JP2001092151A - Plate making method for planographic printing plate, automatic developing machine and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a plate making method for a planographic printing plate which is capable of improving processing efficiency without the possibility of the occurrence of loss by the inadequateness of set temperature conditions and the difference in the set temperature conditions set by an operation error, etc., an automatic developing machine and a recording medium. SOLUTION: A heating control section of the automatic developing machine 16 online acquires various kinds of the set information inputted to a plate setter 14, determines a standard heating capacity from a table of the standard heating capacities meeting the combinations of the kinds, thicknesses and sizes of PS plates in accordance with various kinds of the set information acquired in the manner described above and further corrects the determined standard heating capacity in accordance with a temperature signal Vt inputted from a temperature detecting sensor for detecting the temperature in an exposure region of the plate setter, thereby controlling the heater of a heating section 20 and a transporting mechanism in such a manner that the corrected heating capacity may be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for making a lithographic printing plate, an automatic processor, and a recording medium.

[0002]

2. Description of the Related Art In general, a photosensitive lithographic printing plate (hereinafter referred to as "PS
Plate) is a photosensitive lithographic printing plate processing apparatus (hereinafter referred to as “P”).
S "processor").
In this PS plate processor, the developing process is carried out by immersing the PS plate on which the image is recorded in the developing solution stored in the developing solution while transporting the PS plate into the developing solution, and rubbing with a rubbing means such as a rotary brush roller provided in the developing solution. This is performed by removing the photosensitive layer in the non-image portion of the PS plate. In this PS plate processor, the PS plate that has been processed with the developer is washed with washing water in a washing section (washing treatment), and then subjected to a desensitizing process by applying a gum solution in a desensitizing section. Is performed, processing such as plate surface protection is continuously performed.

Generally, a diazo resin, a photocrosslinking type, or a photopolymerization type is used as a photosensitive layer of a PS plate. Since the photopolymerizable photosensitive layer is radical polymerization, the reaction tends to proceed due to radicals present in the photosensitive layer even after the exposure is completed. As a result, the reaction may be uneven due to the atmosphere and time difference after the exposure, and the printing durability of the photosensitive layer and the size of a halftone dot for forming an image formed on the PS plate may be changed, resulting in deterioration of the obtained image quality. Has been a problem.

[0004] Therefore, before the development of the PS plate, the PS plate is heated by a heating device (preheating) to make the surface temperature of the PS plate uniform, thereby preventing the reaction from becoming uneven.
It has been proposed to make the image quality constant.

The heating conditions vary depending on the thickness and size of the PS plate and the type of PS plate (hereinafter referred to as the plate type).
Before developing the PS plate, the conditions such as the thickness of the PS plate to be developed, the size of the plate, the type of the plate, and the like are manually input to the PS plate processor before developing the PS plate, so that suitable heating conditions are obtained. It is controlled so that heating and development are started after waiting till.

[0006]

However, if the set temperature conditions are inappropriate or the set temperature conditions are different due to an operation error or the like, a plate having a desired image quality cannot be obtained. There is a problem that a large loss must be re-started. In addition, since the heating conditions are generally manually input by the user into the PS plate processor, it is difficult to provide appropriate heating conditions to the exposure area, and operation errors such as forgetting to change or inputting errors may occur. Is inevitable.

Further, in recent years, there has been an increasing demand for energy saving, and reducing the running cost of the apparatus has become an important issue.

As described above, according to the present invention, a lithographic printing plate capable of improving the processing efficiency can be provided without the risk that the set temperature condition is inappropriate or that the set temperature condition is different due to an operation error or the like, thereby causing no loss. An object is to obtain a plate making method, an automatic developing machine, and a recording medium. It is another object of the present invention to provide a method for making a lithographic printing plate, an automatic developing machine, and a recording medium that can suppress power consumption without lowering image quality.

[0009]

In order to achieve the above object, a method of making a lithographic printing plate according to the invention of claim 1 is an exposure step of exposing a lithographic printing plate having a photopolymerizable photosensitive layer based on image data. Before or after the exposure step, based on the plate information used in the previous step, a heating condition determining step of determining a heating condition when heating the lithographic printing plate exposed in the exposure step, the heating condition A heating step of heating the lithographic printing plate on which the exposure image is formed so that the heating conditions determined in the determining step are satisfied; and a developing step of guiding the lithographic printing plate heated in the heating step into a developing tank to develop the lithographic printing plate. And a step.

That is, in the method of making a lithographic printing plate according to the first aspect of the present invention, the lithographic printing plate having an exposed photopolymerizable photosensitive layer exposed in the exposure step is developed before the exposure step. Alternatively, a heating condition is determined based on plate information input to a device provided in a preceding stage later (heating condition determining step).
Then, the lithographic printing plate is heated (heating step) under the determined heating conditions. Thereafter, the plate is obtained by developing (developing step).

The plate information includes at least one of a plate thickness, a plate size, and a plate type. According to the first aspect of the present invention, the user does not manually input such plate information. Since the heating conditions are determined based on the plate information input as information necessary for performing the processing on the lithographic printing plate in the preceding apparatus, operation errors such as forgetting to change or input errors do not occur. In addition, the lithographic printing plate to be heated can always be reliably heated under optimal heating conditions.

The plate type includes, for example, a PS plate for newspapers, a PS plate for high printing durability, a PS plate for high image quality, and the like. The plate thickness is, for example, 0.12 mm, 0.15 mm, 0.2 m
m, 0.24 mm, 0.3 mm, 0.4 mm, etc., and the plate size is, for example, 254 mm
× 391 mm, the medium version is, for example, 650 mm × height × width
550mm, large version, for example, length × width 1030mm ×
There are 800 mm, 1130 mm × 930 mm, and the like.

A typical example of the plate size and thickness is a plate size of 254 mm × 391 mm and a thickness of 0.1 mm.
12mm lithographic printing plate or plate size 650mm x 55
A flat printing plate with a thickness of 0 mm and a thickness of 0.24 mm, or a plate size of 1030 mm x 800 mm or 1130 mm x 930 m
and a flat printed board having a thickness of 0.3 mm. Of course, it is not limited to these plate sizes and thicknesses.

When the thickness of the lithographic printing plate is inputted as the plate information, if the thickness of the lithographic printing plate is large, the thickness of the aluminum plate as the support is also large. The heating capacity is controlled to be large. Also, when the thickness of the lithographic printing plate is thin, the thickness of the aluminum plate as the support is also thin, so that the heat capacity is smaller than when the thickness of the aluminum plate is thick. The heating capacity to be controlled is controlled to be smaller than when the thickness of the lithographic printing plate is large. Thereby, the surface temperature of the lithographic printing plate can be made uniform regardless of the thickness. In addition,
The heating capacity is a value determined by the product of the heating temperature and the heating time.

When a plate size is input as plate information, if the planographic printing plate has a large width and a long length (hereinafter, referred to as an L size), the area of the aluminum plate is small. As the heat capacity increases, the heat capacity is large, and the heating capacity applied to the lithographic printing plate from the heating means is controlled to be large.
It is called S size. In the case of the planographic printing plate of (1), since the heat capacity is small, the heating capacity applied to the planographic printing plate is controlled to be smaller than that of the L-sized planographic printing plate.

Further, when a plate type is input as plate information, for example, when the plate type is a newspaper PS plate, the heating conditions are determined so that the heating temperature is increased and the heating time is shortened. The heating capacity is controlled so as to provide a sufficiently large heating capacity to improve the printing durability. When the plate type is a PS plate for high printing durability, sufficient heating is required to improve the printing durability. However, when the heating temperature is increased, the solubility of the protective layer is reduced, Because of the possibility of thermal polymerization of the product and development failure, the heating conditions are determined so as to secure the required heating capacity by increasing the heating time without increasing the heating temperature so as to improve the printing durability. The heating is controlled so that a sufficiently large heating capacity is provided.

For example, for plate type A, the required heating capacity is 8
Assuming that the temperature is 0 ° C. or more and 130 ° C. or less for 10 seconds, the minimum heat amount actually required is 80 ° C. for 10 seconds or 100 ° C. for 5 seconds. As described above, if the heating temperature is increased, the solubility of the protective layer may be reduced, or thermal polymerization of the photosensitive layer may occur, resulting in poor development. Therefore, it is necessary to adjust the heating temperature not to be so high. In some cases, 10 seconds at 80 ° C,
When the heating temperature may be increased, the temperature is set to 100 ° C. for 5 seconds.

The upper limit temperature at which the solubility of the protective layer is reduced or the thermal polymerization of the photosensitive layer occurs to cause defective development varies depending on the type of plate, but is generally 130 ° C.
It is about 145 ° C. or less. Therefore, 70 ° C or more
At a heating temperature of 40 ° C. or less, a heating time of 3 seconds or more and 60 seconds or less is within an appropriate range, and more preferably 80 ° C. or more and 13 seconds or less.
At about 0 ° C. or less, the time is 5 seconds or more and 30 seconds or less. Of course, the temperature is not limited to the above value since there is an appropriate temperature range depending on the type of plate type.

Further, when the plate type is a PS plate for high image quality, the heating temperature and the heating time are determined so as to have a medium heating capacity, and the entire surface is uniformly heated so that the halftone dot is obtained. Control to make the quality uniform. There are various plate types other than the above-described PS plate for newspapers, PS plate for high printing durability, PS plate for high image quality, and the like, and control is performed so that optimal heating conditions are obtained for each. Is done.

Further, when all the information of the thickness, plate size, and plate type of the lithographic printing plate has been input as plate information,
The heating conditions are determined so as to be optimal according to the combination of each thickness, plate size and plate type. For example, a typical example in which the thickness, plate size, and plate type of a lithographic printing plate are input as plate information will be briefly described.

For example, in the case of a large-format high-durability PS plate having a plate thickness of 0.4 mm and a plate size of 1130 mm × 930 mm, the heating conditions are set so that the heating capacity is maximized in order to increase the degree of polymerization (curing rate). To determine. Further, for example, in the case of a PS plate for medium format and high printing durability having a plate thickness of 0.24 mm and a plate size of 650 mm × 550 mm, heating is performed uniformly for emphasizing image quality and halftone dot quality is uniform. The heating conditions are determined so as to be about the same. Further, for example, a PS plate which is a line drawing and does not require much printing durability (a PS plate which the user has determined to be unnecessary for high printing durability for a high printing durability or high image quality plate type)
Also, the plate thickness is 0.12mm and the plate size is 254mm x 3
In the case of a 91 mm oval PS plate for high printing durability, the heating conditions are determined so that the heating capacity is minimized (including the case where heating is not performed).

According to a second aspect of the present invention, there is provided an automatic developing machine for realizing a pre-development method of an exposed lithographic printing plate having a photopolymerizable photosensitive layer according to the first aspect of the invention. Before developing the exposed lithographic printing plate having a polymerizable photosensitive layer, heating means for heating the lithographic printing plate, and the exposed lithographic printing plate having the photopolymerizable photosensitive layer by the heating means When heating, heating control means to determine the heating conditions based on the plate information input from the device provided in the previous stage, and to control the heating means so as to meet the determined heating conditions, I have.

That is, in the invention of claim 2, the heating control means of the automatic developing machine determines the heating condition to be given to the lithographic printing plate based on the plate information inputted from the apparatus provided at the preceding stage, and the heating condition is determined. Since the heating means heats the lithographic printing plate under the heating conditions, the thickness of the plate of the lithographic printing plate to be actually heated, the plate size, and appropriate heating conditions can be set according to the plate type, The heating process can be performed without an operation error such as forgetting to change or an input error.

Further, at a point before plate information is inputted to the preceding apparatus and before the preceding apparatus starts processing, the heating control means acquires the plate information and determines an optimal heating condition for the planographic printing plate. With such a configuration, the heating conditions of the automatic developing machine are set so that the heating conditions suitable for the next plate to be processed immediately after the heating process of the currently heated plate is completed. Can be changed, so that the time until the next heating condition is achieved can be shortened, and the processing efficiency can be improved. This is particularly advantageous when different types of plates are subsequently set and the heating conditions are significantly changed.

As described in claim 3, the heating distribution is controlled by an input device provided before the development of an exposed lithographic printing plate having a photopolymerizable photosensitive layer. Heating conditions are determined based on the obtained plate information, and the program is performed by heating the lithographic printing plate so that the lithographic printing plate is heated under the determined heating conditions. This program may be recorded in advance on a recording medium of the automatic developing machine, or may be stored on a recording medium separate from the automatic developing machine and installed from the recording medium.

The plate information for determining the heating conditions is as follows:
What has been obtained or input online or offline from a device provided before the heating means for heating the lithographic printing plate can be used.

Further, the lithographic printing plate having a photopolymerizable photosensitive layer used in the present invention comprises, on a support, a photopolymerizable photosensitive layer,
A photosensitive lithographic printing plate in which a protective layer for protecting the photosensitive layer is sequentially laminated is preferable.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the present embodiment,
As shown in FIG. 1, a personal computer 10, a workstation 1
2. A case where the present invention is applied to a plate making system including a plate setter (exposure device) 14 and a PS plate processor (automatic developing device) 16 will be described.

The photosensitive lithographic printing plate (hereinafter, referred to as PS plate) used in the present embodiment includes an organic undercoat layer on the surface of an aluminum support provided with a back coat layer on the back surface, and a photopolymerization. And a layer in which a photosensitive layer and an overcoat layer are sequentially provided. The details of the PS plate will be described later.

The plate making system according to the present embodiment comprises a personal computer 10, a work station 12, a plate setter 1
4 and the PS plate processor 16 are all connected online, and various setting information such as image data, plate thickness, plate size and PS plate type (plate type) input to the personal computer 10 are online. Can be output up to

The personal computer 10 includes, for example, an application that edits an image read from image reading means such as a scanner while displaying the image on a display, creates a new character or image on the display, and creates an image to be printed. Is installed.

This application outputs the image created by the user to the workstation 12 as vector-format image data such as an outline, a drawing command for designating the area ratio of the filled area, the transmittance of the filled area, and the like. I do. Further, various setting information such as the type, thickness and size of the PS plate to be exposed, which is input by the user from the keyboard at the same time as the creation of the image, is converted into text data together with the vector format image data. Output to the workstation 12.

The workstation 12 has a raster image processor (hereinafter referred to as RIP) and driver software for the platesetter 14 installed therein.

The RIP interprets vector-format image data and develops it as an array of dots having gradations.
FF format file (hereinafter referred to as TIFF file)
In this embodiment, the image data is converted from a vector format image data into a TIFF file including a tag format header portion and an image data portion.

The driver software of the plate setter 14 is a TIFF file and a PS version in a text format.
This is software that converts various setting information such as plate thickness and plate size into an image format that can be analyzed by the platesetter 14, and outputs the image format to the platesetter 14.

Therefore, the workstation 12 converts the vector-format image data such as the drawing command input from the personal computer 10 into a TIFF file, and then converts the TIFF file and the PS plate into a plate type, a plate thickness, a plate size, and the like. Various setting information of the plate setter 1
4 is converted into an image format that can be analyzed by the platesetter 14, and then output to the platesetter 14.

The plate setter 14 includes a ROM and a RAM.
And a setter control section 18 composed of a CPU.
Various programs for controlling the plate setter 14 are stored in the ROM, and a TIFF in an image format that can be analyzed by the plate setter 14 is stored in the RAM.
The file and various setting information are temporarily stored.

The CPU calls various programs from the ROM, and reads T from the RAM based on the programs.
Based on the IFF file and the various kinds of setting information described above, for example, a control signal for controlling a transport speed of a transport unit (not shown) of the plate setter 14, an on / off drive signal of a laser light source (not shown), and a light amount A variety of control signals such as a laser drive signal for performing the adjustment are generated, and the driving of the platesetter 14 is controlled by the various control signals. As a result, the plate setter 14 can use the personal computer 1
PS version 11 under optimal conditions according to the image selected on
0 exposure processing is performed. In addition, since the exposure processing of the plate setter 14 is publicly known, detailed description is omitted here.

Further, the driver software of the PS plate processor 16 is installed in the ROM of the setter control unit 18, and various setting information such as plate type, plate thickness, and plate size are stored in the driver software of the PS plate processor 16. Is converted to a format that can be analyzed by the PS version processor 16 and then output to the PS version processor 16.

As shown in FIG. 2, the PS plate processor 16 is roughly divided into a heating section 20, a first washing section 22, a developing section 24, a second washing section 26, a finisher section 28, a drying section 29, and a processor control section. The PS plate is heated from the heating unit 20 to the first rinsing unit 22, the developing unit 24, the second rinsing unit 26, the finisher unit 28, and the drying unit 29 in this order by a transport mechanism composed of a plurality of pairs of transport rollers. It is a configuration to be transported.

The heating unit 20 rotates the PS plate with the pair of rollers sandwiching the PS plate, thereby rotating the exposed PS plate 1.
An image forming area in the photopolymerizable photosensitive layer of the PS plate 110 is constituted by a pair of draw-in rollers 31 for pulling the PS plate 10 into the interior of the PS plate processor 16 and a heating device 32. (I.e., accelerate the curing of the exposed areas).

As shown in FIG. 2, the heating device 32 includes a heating means 34, a plurality of transport rollers 36 for transporting the PS plate 110 on the lower surface side of the PS plate 110, a heating control unit 38, and a temperature detection sensor 40 (see FIG. 2). 1).

The temperature detecting sensor 40 detects the temperature in the exposure section of the plate setter 14 provided in the preceding stage of the PS plate processor 16 or the temperature of the PS plate 110 before the heat treatment. It is possible to use a warming element or the like that converts the temperature into a level change and outputs it as a temperature signal Vt.

The heating control unit 38 includes a RAM, a ROM, and a C
When a detection result is output from the temperature detection sensor 40 and the above-described various setting information is input to the plate setter 14, the various setting information is acquired online before starting the heating control.

Various setting information acquired from the plate setter 14 is stored in the RAM. The ROM has a standard heating capacity (product of heater output and heating time) given to the PS plate according to the combination of the plate type, plate thickness, and plate size of the PS plate.
Is stored. As a table of the standard heating capacity, for example, as shown in Tables 1 and 2, the table is divided into a short run (Table 1) and a long run (Table 2) according to the combination of thickness and size. Standard heating capacity is defined.

[0046]

[Table 1]

[0047]

[Table 2]

In Tables 1 and 2, the relationship between the heating capacities is as follows. That is, in Table 1, since the larger the size, the larger the heat capacity and the larger the heating, the larger the size, the larger the Q1 <Q2 <Q3, Q4 <
Q5 <Q6, Q7 <Q8 <Q9, and since the heat capacity increases as the thickness increases, Q1 <Q4 <Q
7, Q2 <Q5 <Q8, Q3 <Q6 <Q9. Table 2
For the same reason, Q11 <Q12 <Q13, Q14
<Q15 <Q16, Q17 <Q18 <Q19, and Q11 <Q14 <Q17, Q12 <Q15 <Q1
8, Q13 <Q16 <Q19.

Further, since it is necessary to apply a larger amount of heat to the long run than to the short run, there is a relationship that Q11 which is the smallest amount of heat in Table 2 is larger than Q9 which is the largest amount of heat in Table 1. ing.

In the ROM, based on the various setting information stored in the RAM, for example, a standard heating capacity optimum for the read setting information is selected from the standard heating capacity table as described above. , And a temperature detection sensor 40
When the temperature signal Vt is large, that is, when the detected temperature is high, the temperature of the PS plate itself is also high, so that the standard heating capacity is given to the PS plate less than the standard heating capacity. When the heating capacity is corrected and the temperature signal Vt from the temperature detection sensor 40 is small, that is, when the detected temperature is low, the temperature of the PS plate itself is also low, so that the heating capacity is larger than the standard heating capacity. The heating capacity determination program shown in FIG. 3 for correcting the standard heating capacity so as to give the PS plate with the correction value and generating a control signal Vc for controlling the heater driving voltage based on the corrected heating capacity is stored.

Here, the control of the drive voltage executed by the CPU of the heating control unit 38 will be described with reference to the flowchart of FIG. In step 200, first,
The various setting information stored in the RAM is read.

In the next step 202, a standard heating capacity is selected from a standard heating capacity table based on various setting information read from the RAM. For example, when the standard heating capacity table described above is used, if the plate type is short run, the plate size is M size, and the thickness is d2, Table 1 is used.
From Q5.

In the next step 204, in accordance with the temperature signal Vt input from the temperature detection sensor 40, the standard heating capacity is set to be larger, smaller, or one of the standard heating capacities. Correct heating capacity of.

In the next step 206, a control signal Vc to be supplied to a heater drive circuit (not shown) and a transport control signal for controlling the transport speed of the PS plate 110 by the transport mechanism are generated so that the adjusted heating conditions are obtained. Then, this routine ends. The control signal Vc controls the heater output and the transport speed of the heating device 32 so that the heating conditions are adjusted.

For example, black-coated 500
The two halogen lamp heaters of W
mm high-quality PS plate having an aluminum substrate of 0.3 mm thickness was used as the PS plate, and the transport speed of the PS plate was 19 m.
The case of m / sec will be described.

In the above conditions, the standard temperature condition is that the temperature detected by the temperature detection sensor 40 is 25 ° C.
(Ie, room temperature), the output of the heating device 32 is 470 W
If the temperature is lower than 25 ° C., the output of the heating device 32 is set to be larger than that at 25 ° C., and the PS plate 110
The heat output to the PS plate 110 is increased by increasing the amount of heat applied to the PS plate 110 when the temperature is higher than 25 ° C.
Reduce the amount of heat given to

Specifically, when the temperature detected by the temperature detection sensor 40 is 10 ° C., the output of the heating device 32 is
0 W, when the temperature is 15 ° C., the output of the heating device 32 is set to 5
When the temperature is 30 W, the output of the heating device 32 is 500 W when the temperature is 20 ° C., and when the temperature is 30 ° C., the output of the heating device 32 is 440 W.

Instead of storing the standard heating capacity table, a heating capacity conversion characteristic graph table individually determined according to various setting information is stored, and the heating capacity corresponding to the read various setting information is stored. It is also possible to read the conversion characteristic graph and calculate the heating capacity corresponding to the temperature detected by the temperature detection sensor 40 from the graph.

As described above, the heating means of the present embodiment determines the heating condition based on various setting information inputted online from the plate setter 14, thereby reducing the surface temperature of the PS plate and the type of the PS plate 110. Heating conditions that are optimal for the combination of plate thickness, plate size, and plate setter 14
Irrespective of the temperature in the exposed portion or the temperature of the PS plate 110 before the heat treatment, it is possible to eliminate inconveniences such as insufficient heat treatment and over heat treatment, and to perform favorable heat treatment.

Further, since there is no need for the user to input various setting information, it is possible to avoid the occurrence of loss due to operation mistakes and the like, and it is possible to efficiently switch to the next heating condition. The processing efficiency over the processing can also be improved.

In the heating section 20, the PS plate 110 that has been subjected to the heat treatment is supplied to the first washing section 2 provided in the subsequent stage.
2 is transferred.

As shown in FIG. 2, the first washing section 22 includes, in the first washing tank 60, a drawing roller pair 62 and a first washing water supply nozzle in order from the upstream side along the transport direction of the PS plate 110. 64b, a first rotating brush roller 66 and a backup roller 67, a second cleaning water supply nozzle 64b, and a pair of delivery rollers 68. The overcoat layer formed on the outermost surface of the PS plate 110 is removed by washing with water before development. I do.

Further, a first overflow pipe 61 is provided in the first washing tank 60, and when the liquid level of the washing water accumulated in the first washing tank 60 exceeds a predetermined level, the first washing pipe is used. It is adjusted so that it flows into the overflow pipe 61 and is guided to the washing water tank 63 so that a constant amount of washing water is always held in the first washing tank 60.

The cleaning water tank 63 is provided with a pump P. The cleaning water is pumped up by the pump P, and the first cleaning water supply nozzle 64a and the second cleaning water supply nozzle 6 are pumped.
4b.

The first washing section 2 is driven by the pull-in roller pair 62.
The heated PS plate 110 drawn into 2 is sandwiched between the first first rotating brush roller 66 and the backup roller 67 with the cleaning water supplied to the surface by the first cleaning water supply nozzle 64a. When transported, the surface is polished by the first rotating brush roller 66, and the uppermost overcoat layer of the PS plate 110 is removed.

A second stage is provided after the first rotating brush roller 66.
A cleaning water supply nozzle 64b is provided, and the cleaning water supplied from the second cleaning water supply nozzle 64b to the surface of the PS plate 110 is removed by the first rotating brush roller 66 attached to the surface of the PS plate 110. The residue of the overcoat layer is removed. Thereby, the overcoat layer is removed from the surface of the PS plate 110, and the PS plate 110
The toner is sent out to the developing unit 24 provided at the subsequent stage of the first washing unit 22 by the sending roller pair 68.

As shown in FIG. 2, the developing section 24 includes, in the developing tank 70, a drawing roller pair 72, a developer injection nozzle 74,
Dilution water injection nozzle 76, first spray pipe 78, first
Rotating brush roller 71a, second rotating brush roller 71b
And a delivery roller pair 75, and performs development processing by immersing the PS plate 110 in a developer.

The pull-in roller pair 72 is connected to the first washing section 22.
Is drawn into the developing unit 24 at an angle in the range of about 15 ° to 31 ° with respect to the horizontal direction. The developer injection nozzle 74 injects the developer pumped up from the developer storage tank 82 by the pump P into the developer tank 70. The drive of the pump P is controlled by the processor control unit 30. Similarly, the dilution water injection nozzle 76 injects the dilution water pumped up from the water storage tank 84 by the pump P into the development tank 70. The drive of the pump P is also controlled by the processor control unit 30.

The processor control unit 30 controls the amount of the developing solution and the amount of the dilution water to be supplied according to the area ratio of the image forming area. In other words, the larger the developing area, the faster the deterioration of the developing solution. Therefore, the dilution water is reduced and the developing solution is supplied so as to increase, and the smaller the developing area, the slower the deterioration of the developing solution. The concentration of the developing solution is adjusted by reducing the dilution water and supplying the developing solution so as to increase.

A second overflow pipe 79 for collecting the developing solution overflowing from the developing tank 70 is provided in the developing tank 70 so that the liquid level of the developing solution accumulated in the developing tank 70 is maintained at a predetermined level. Is exceeded, the developer flows into the second overflow pipe 79 and the waste liquid tank 8
The developing tank 70 is adjusted so that a constant amount of the developing solution is always held in the developing tank 70.

The developer used in the present invention contains the following components.

(Alkali agent) The developing solution and the developing replenisher used in the developing method of the present invention have a pH of 9.0 to 13.5.
More preferably, it is an alkaline aqueous solution of 10.0 to 13.3.

As such a developing solution and a developing replenishing solution, conventionally known alkaline aqueous solutions can be used. For example, sodium silicate, potassium, tribasic sodium, potassium, ammonium, dibasic sodium phosphate, potassium, ammonium, sodium bicarbonate, potassium, ammonium, sodium carbonate, potassium, potassium Inorganic alkaline agents such as ammonium, sodium bicarbonate, potassium, ammonium, sodium borate, potassium, ammonium, sodium hydroxide, ammonium, potassium, and lithium. Also, monomethylamine, dimethylamine, trimethylamine, monoethylamine, diethylamine, triethylamine, monoisopropylamine, diisopropylamine, triisopropylamine, n-butylamine, monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, Organic alkali agents such as ethyleneimine, ethylenediamine and pyridine are also used.

Preferred among these alkaline agents are aqueous silicate solutions such as sodium silicate and potassium silicate. The reason is that silicon oxide Si
The ratio of O ₂ to alkali metal oxide M ₂ O (generally [SiO 2
₂ ] / [M ₂ O] molar ratio) and the concentration allow adjustment of pH and developability. For example, Si
When the molar ratio of O ₂ / Na ₂ O is 1.0 to 1.5 (that is, [Si
O ₂ ] / [Na ₂ O] is 1.0 to 1.5), and Si
An alkali metal silicate composed of an aqueous solution of sodium silicate having an O ₂ content of 1 to 4% by weight is suitably used in the present invention.

Still another preferred alkaline agent is a buffer comprising a weak acid and a strong base. Weak acids used as such buffers include an acid dissociation constant (pKa) of 1
Those having a pKa of from 10.0 to 13.3 are preferred, and those having a pKa of from 11.0 to 13.1 are particularly preferred. For example, in the case of sulfosalicylic acid, the third dissociation constant is 11.7,
It can be suitably used in the present invention. That is, in the case of a polybasic acid, it can be used in the present invention if at least one acid dissociation constant is within the above range.

[0076] Such weak acids include Pergamo.
IONISATION CON issued by nPress
STANTS OF ORGANIC ACIDS I
Selected from those described in NAQUEOUS SOLUTION, etc., for example, 2,2,3,3-tetrafluoropropanol-1 (pKa 12.74), trifluoroethanol (12.37), and trichloroethanol (12 .24), aldehydes such as pyridine-2-aldehyde (12.68) and pyridine-4-aldehyde (12.05), sorbitol (13.0), and saccharose (12.7). ), 2
-Deoxyribose (12.61), 2-deoxyglucose (12.51), glucose (12.4)
6), galactose (12.35), arabinose (12.34), xylose (12.29), fructose (12.27), ribose (12.22), mannose (12.08) , L-ascorbic acid (1)
Saccharides such as 1.34), salicylic acid (13.0), 3-
Hydroxy-2-naphthoic acid (12.84), catechol (12.6), gallic acid (12.4), sulfosalicylic acid (11.7), 3,4-dihydroxysulfonic acid (12.84) 2), 3,4-dihydroxybenzoic acid (11.94), 1,2,4-trihydroxybenzene (11.82), hydroquinone (11.56), pyrogallol (11.34) and resorcinol Compounds having a phenolic hydroxyl group such as (11.27), 2-butanone oxime (12.45), acetoxime (12.42), 1,2-cycloheptanediondioxime (12.3), 2-hydroxybenzaldehyde oxime (12.10), dimethylglyoxime (11.9), ethanediamide dioxime (11.1)
37), oximes such as acetophenone oxime (11.35), 2-quinolone (11.76), 2-pyridone (11.65) and 4-quinolone (11.2)
8), 4-pyridone (11.12), 5-aminovaleric acid (10.77), 2-mercaptoquinoline (10.77)
25), amino acids such as 3-aminopropionic acid (10.24), fluorouracil (13.0), guanosine (12.6), uridine (12.6), adenosine (12.56) , Inosine (12.5), guanine (12.3), citidine (12.2), cytosine (12.2), hypoxanthine (12.1), xanthine (11.9), etc. In addition, diethylaminomethylphosphonic acid (12.32), 1-amino-3,3,3-trifluorobenzoic acid (12.2)
9), isopropylidene diphosphonic acid (12.1)
0), 1,1, -ethylidene diphosphonic acid (11.5)
4), 1-hydroxy 1,1-ethylidene diphosphonic acid (11.52) and benzimidazole (12.8).
6), thiobenzamide (12.8), picoline thioamide (12.55), barbituric acid (12.5) and the like.

As the strong base to be combined with these weak acids, sodium hydroxide, ammonium hydroxide, potassium and lithium are used.

These alkaline agents are used alone or in combination of two or more.

Preferred among these alkaline buffers are those obtained by combining sulfosalicylic acid, salicylic acid, saccharose and sorbitol with sodium hydroxide and potassium hydroxide. Among them, a preferred combination is sorbitol and potassium hydroxide or sodium hydroxide.

The above-mentioned various alkaline agents are used by adjusting the pH within a preferred range depending on the concentration and combination.

(Surfactant) The developer and replenisher used in the present invention may contain various surfactants as necessary for the purpose of accelerating developability, dispersing developed scum, and increasing the ink affinity of the printing plate image area. Agents and organic solvents can be added. Preferred surfactants include anionic, cationic, nonionic and amphoteric surfactants.

Preferred examples of the surfactant include polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene polystyryl phenyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, and glycerin fatty acid partial esters. , Sorbitan fatty acid partial esters,
Pentaerythritol fatty acid partial esters, propylene glycol monofatty acid esters, sucrose fatty acid partial esters, polyoxyethylene sorbitan fatty acid partial esters, polyoxyethylene sorbitol fatty acid partial esters, polyethylene glycol fatty acid esters, polyglycerin fatty acid partial esters , Polyoxyethylenated castor oils, polyoxyethylene glycerin fatty acid partial esters, fatty acid diethanolamides,
Nonionic surfactants such as N, N-bis-2-hydroxyalkylamines, polyoxyethylene alkylamines, triethanolamine fatty acid esters, and trialkylamine oxides, fatty acid salts, abietic acid salts,
Hydroxyalkanesulfonates, alkanesulfonates, dialkylsulfosuccinates, linear alkylbenzenesulfonates, branched alkylbenzenesulfonates, alkylnaphthalenesulfonates, alkylphenoxypolyoxyethylenepropylsulfonates, polyoxy Ethylene alkyl sulfophenyl ether salts, N-methyl-N-oleyltaurine sodium salt, N-alkyl sulfosuccinic acid monoamide disodium salt, petroleum sulfonates, sulfated tallow oil, sulfate salts of fatty acid alkyl esters, alkyl sulfates Salts, polyoxyethylene alkyl ether sulfates, fatty acid monoglyceride sulfates, polyoxyethylene alkyl phenyl ether sulfates, Oxyethylene styryl phenyl ether sulfates, alkyl phosphates, polyoxyethylene alkyl ether phosphates, polyoxyethylene alkyl phenyl ether phosphates, partially saponified styrene / maleic anhydride copolymers, Partially saponified olefin / maleic anhydride copolymers, anionic surfactants such as naphthalene sulfonate formalin condensates, quaternary ammonium salts such as alkylamine salts, tetrabutylammonium bromide, polyoxyethylene alkylamine Salts, cationic surfactants such as polyethylene polyamine derivatives, amphoteric surfactants such as carboxybetaines, aminocarboxylic acids, sulfobetaines, aminosulfates, and imidazolines. . Among the surfactants listed above, those with polyoxyethylene,
It can be read as a polyoxyalkylene such as polyoxymethylene, polyoxypropylene, polyoxybutylene, and their surfactants are also included.

Further preferred surfactants are fluorine-based surfactants containing a perfluoroalkyl group in the molecule. Such fluorosurfactants include perfluoroalkyl carboxylate, perfluoroalkyl sulfonate, anionic type such as perfluoroalkyl phosphate, amphoteric type such as perfluoroalkyl betaine,
Cationic and perfluoroalkylamine oxides such as perfluoroalkyltrimethylammonium salts, perfluoroalkylethylene oxide adducts, oligomers containing perfluoroalkyl and hydrophilic groups,
Non-ionic forms such as oligomers containing perfluoroalkyl groups and lipophilic groups, oligomers containing perfluoroalkyl groups, hydrophilic groups and lipophilic groups, and urethanes containing perfluoroalkyl groups and lipophilic groups.

The above-mentioned surfactants can be used alone or in combination of two or more.
001 to 10% by weight, more preferably 0.01 to 5% by weight.

(Development Stabilizer) Various development stabilizers are used in the developer and replenisher used in the present invention.
Preferred examples thereof include polyethylene glycol adducts of sugar alcohols described in JP-A-6-282079, tetraalkylammonium salts such as tetrabutylammonium hydroxide, phosphonium salts such as tetrabutylphosphonium bromide, and iodonium such as diphenyliodonium chloride. Salts are mentioned as preferred examples.

Further, anionic or amphoteric surfactants described in JP-A-50-51324, water-soluble cationic polymers described in JP-A-55-95946, and JP-A-56-142528 are disclosed. There is a water-soluble amphoteric polyelectrolyte described in the gazette.

Further, an organic boron compound to which an alkylene glycol has been added described in JP-A-59-84241, and a polyoxyethylene / polyoxypropylene block polymerization type water-soluble surfactant described in JP-A-60-111246. Japanese Patent Application Laid-Open No. Sho 60-129750, polyoxyethylene / polyoxypropylene-substituted alkylenediamine compounds, Japanese Patent Application Laid-Open No. Sho 61-215554, polyethylene glycol having a weight average molecular weight of 300 or more, and Japanese Patent Application Laid-Open No. Sho 63-175858. JP-A-2-39157 discloses a fluorine-containing surfactant having a cationic group, a water-soluble ethylene oxide addition compound obtained by adding 4 mol or more of ethylene oxide to an acid or alcohol, and a water-soluble polyalkylene compound. No.

(Organic Solvent) An organic solvent is further added to the developing solution and the developing replenisher, if necessary. As such an organic solvent, those having a solubility in water of about 10% by weight or less are suitable, and preferably selected from those having a solubility of 5% by weight or less. For example, 1-phenylethanol, 2-phenylethanol, 3-phenyl-1-propanol, 4-phenyl-1-butanol, 4-phenyl-2-butanol, 2-phenyl-1-butanol, 2-phenoxyethanol, 2-phenoxyethanol, Benzyloxyethanol, o-methoxybenzyl alcohol, m-methoxybenzyl alcohol, p-methoxybenzyl alcohol, benzyl alcohol, cyclohexanol, 2-methylcyclohexanol, 3-methylcyclohexanol and 4-methylcyclohexanol, N-phenylethanol Examples include amines and N-phenyldiethanolamine. The content of the organic solvent is 0.1 to 5% by weight based on the total weight of the used solution. The amount used is closely related to the amount of surfactant used, and as the amount of organic solvent increases,
Preferably, the amount of surfactant is increased. This is because when the amount of the surfactant is small and the amount of the organic solvent is large, the organic solvent is not completely dissolved, and therefore, it is impossible to expect good developing property.

(Reducing Agent) A reducing agent is further added to the developer and replenisher used in the present invention. This is to prevent stains on the printing plate, and is particularly effective when developing a negative photosensitive lithographic printing plate containing a photosensitive diazonium salt compound. Preferred organic reducing agents include phenolic compounds such as thiosalicylic acid, hydroquinone, methol, methoxyquinone, resorcin, and 2-methylresorcin; and amine compounds such as phenylenediamine and phenylhydrazine. Further preferred inorganic reducing agents include sodium salts, potassium salts, and ammonium salts of inorganic acids such as sulfurous acid, bisulfite, phosphorous acid, bisulfite, diphosphite, thiosulfate and dithionite. Salts and the like can be mentioned. Among these reducing agents, sulfites are particularly excellent in the stain prevention effect. These reducing agents are preferably used in the developer during use,
It is contained in the range of 0.05 to 5% by weight.

(Organic carboxylic acid) The developing solution and replenisher used in the present invention may further contain an organic carboxylic acid. Preferred organic carboxylic acids are those having 6 to 2 carbon atoms.
0 aliphatic carboxylic acids and aromatic carboxylic acids.
Specific examples of aliphatic carboxylic acids include caproic acid,
Examples include enanthylic acid, caprylic acid, lauric acid, myristic acid, palmitic acid and stearic acid, and particularly preferred are alkanoic acids having 8 to 12 carbon atoms. Further, unsaturated fatty acids having a double bond in the carbon chain or branched fatty acids may be used.

The aromatic carboxylic acid is a compound in which a carboxyl group is substituted on a benzene ring, a naphthalene ring, an anthracene ring or the like, and specifically, o-chlorobenzoic acid,
p-chlorobenzoic acid, o-hydroxybenzoic acid, p-hydroxybenzoic acid, o-aminobenzoic acid, p-aminobenzoic acid, 2,4-dihydroxybenzoic acid, 2,5-dihydroxybenzoic acid, 2,6- Dihydroxybenzoic acid,
2,3-dihydroxybenzoic acid, 3,5-dihydroxybenzoic acid, gallic acid, 1-hydroxy-2-naphthoic acid, 3-hydroxy-2-naphthoic acid, 2-hydroxy-1-naphthoic acid, 1-naphthoic acid And 2-naphthoic acid, and hydroxynaphthoic acid is particularly effective.

The above aliphatic and aromatic carboxylic acids are preferably used as a sodium salt, a potassium salt or an ammonium salt in order to enhance water solubility. The content of the organic carboxylic acid in the developer used in the present invention is not particularly limited, but if the content is less than 0.1% by weight, the effect is not sufficient.
If it is 0% by weight or more, not only the effect cannot be further improved but also dissolution may be hindered when another additive is used in combination. Therefore, the preferred amount of addition is 0.1 to 10% by weight, more preferably 0.5 to 10% by weight, based on the developer used.
4% by weight.

(Others) The developer and replenisher used in the present invention may further contain an antifoaming agent and a water softener, if necessary. Examples of water softeners include polyphosphoric acid and its sodium, potassium, and ammonium salts, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid, hydroxyethylethylenediaminetriacetic acid, nitrilotriacetic acid, 1,2-diaminocyclohexanetetraacetic acid. Aminopolycarboxylic acids such as acetic acid and 1,3-diamino-2-propanoltetraacetic acid and their sodium, potassium and ammonium salts, aminotri (methylenephosphonic acid), ethylenediaminetetra (methylenephosphonic acid), diethylenetriaminepenta (methylene Phosphonic acid), triethylenetetraminehexa (methylenephosphonic acid), hydroxyethylethylenediaminetri (methylenephosphonic acid) and 1-hydroxyethane-1,1-diphosphonic acid and their sodium salts, potassium salts and ammonium salts.

The optimum value of such a water softener varies depending on the chelating power thereof, the hardness of the hard water used and the amount of the hard water. 01 to 5% by weight, more preferably 0.01 to 5% by weight
It is in the range of 0.5% by weight. If the added amount is less than this range, the intended purpose is not sufficiently achieved, and if the added amount is larger than this range, an adverse effect on an image portion such as color omission appears.

The remaining component of the developer and replenisher is water, but may further contain various additives known in the art, if necessary.

It is advantageous from the viewpoint of transportation that the developing solution and the replenishing solution used in the present invention are concentrated solutions having a smaller water content than at the time of use, and are diluted with water at the time of use. The degree of concentration in this case is suitably such that each component does not cause separation or precipitation.

The temperature of the developer is preferably from 15 to 40 ° C., more preferably from 20 to 35 ° C. Development time is 5-60
Seconds are preferred, and more preferably 7 to 40 seconds.

A liquid surface cover 73 is disposed on the developer liquid surface of the developing section 24. The liquid surface cover 73 is arranged so that the lower surface is lower than the liquid surface of the developer stored in the developing tank 70. The liquid level cover 73 allows the developing tank 70
The area where the liquid level of the developing solution in the inside comes into contact with air is narrowed, thereby suppressing the deterioration of the developing solution and the evaporation of moisture in the developing solution due to carbon dioxide in the air.

In the developing solution inside the developing tank 70,
A guide plate 77 having a substantially inverted mountain shape is formed on the inner surface of which the bottom center portion projects downward. The guide plate 77 has a configuration in which a plurality of freely rotating rollers (small rollers; not shown) are arranged with their rotating shafts arranged in parallel in a direction orthogonal to the transport direction of the PS plate 110. PS sent
The plate 110 is transported while being guided by rollers. At this time, since the rollers rotate, the PS plate 110 is not damaged by sliding.

A first spray pipe 78 is provided in the developing solution on the way to the lowest position of the guide plate 77. The first spray pipe 78 is composed of a plurality of spray pipes arranged along a direction orthogonal to the transport direction of the PS plate 110, and sprays a developer from each spray pipe onto the surface of the PS plate 110, thereby forming a PS. Edition 11
In addition to promoting the development process of No. 0, it plays a role of circulating the developer in the developing tank 70.

Along the downstream side from the lowest position of the guide plate 77, the first rotary brush roller 71a and the second rotary brush roller 71 are located at positions corresponding to the upper surface of the PS plate 110.
The first rotating brush roller 71a and the second rotating brush roller 71b are driven by driving means (not shown) to rotate in the transport direction of the PS plate 110.

At the final stage position of the developing section 24, there is provided a delivery roller pair 75 in which a holding section is disposed at a position above the liquid level of the developing solution.
, Sandwiches the PS plate 110 conveyed along the guide plate 77 provided in the developing solution and sends it out from the developing unit 24.
At this time, the developer adhering to the surface of the PS plate 110 is squeezed.

That is, the PS plate 110 sent out from the first rinsing section 22 is supplied to the draw roller pair 72 of the developing section 24.
Is drawn into the developing unit 24 at an angle in the range of about 15 ° to 31 ° with respect to the horizontal direction, and is conveyed along the surface of the guide plate 77 provided in the developing solution. At this time, PS
The plate 110 is immersed in the developing solution, and then the undeveloped portion of the photopolymerizable photosensitive layer is reliably swollen by the developing solution sprayed by the first spray pipe 78 provided on the way to the lowest position of the guide plate 77. (Ie, developed).

When the PS plate 110 moves downstream from the lowest position of the guide plate 77, the first rotating brush roller 71a,
The surface is rubbed in the order of the second rotating brush roller 71b, and the undeveloped portion of the swollen photopolymerizable photosensitive layer is rubbed off. Further, the PS plate 110 is pulled out from the developing solution by being held by the feed roller pair 75 from the final end position of the guide plate 77, and the developing solution attached to the front and back surfaces when being sent to the feed roller pair 75 is squeezed. And the developing unit 24
To the second washing section 26 provided at the subsequent stage.

As shown in FIG. 2, the second washing section 26 includes a second washing tank 90, two pairs of conveying rollers 92 and 94, a second spray pipe 96, and a third spray pipe 98. The PS plate 110 thus washed is washed with washing water to completely remove the developer adhering to the PS plate 110.

The two transport roller pairs 92 and 94 are located above the second washing tank 90 and in the PS plate 11 of the second washing section 26.
It is provided at the zero retract position and the feed position. The transport roller pairs 92 and 94 form a transport path for the PS plate 110, rotate by receiving a driving force of a driving unit (not shown), and pinch and transport the PS plate 110 sent from the developing unit 24.

Between the two pairs of conveying rollers 92 and 94,
A second spray pipe 96 and a third spray pipe 98 are provided above and below the PS plate 110 conveyance path, respectively.
Are arranged.

[0108] The second spray pipe 96 pumps up water from the water storage tank 84 by the pump P, and replenishes the water in the second washing tank 90. The third spray pipe 98
It is constituted by a plurality of spray pipes arranged along a direction orthogonal to the transport direction of the PS plate 110,
By injecting the cleaning water onto the surface of the PS plate 110 in synchronization with the transport of the S plate 110, the cleaning water is jetted across the width of the PS plate 110.

The third spray pipe 98 injects washing water pumped up by a pump P from a storage tank 93 described later toward the surface of the PS plate 110. As a result, the PS plate 110 is washed with water, and the developer is completely removed.

The washing water sprayed from the third spray pipe 98 spreads quickly on the surface of the PS plate 110, and when the PS plate 110 is washed with water, the PS plate 110 is sent out to the finisher section at the subsequent stage by the conveying roller 94. At the same time, it is squeezed from the PS plate 110.

The second washing tank 90 is provided with a third overflow pipe 91. The third overflow pipe 91 guides the washing water flowing into the pipe by raising the water level in the second washing tank 90 to the storage tank 93,
The water level in the second washing tank 90 is always kept constant. The storage tank 93 is provided with a pump P, and the stored cleaning water is pumped up by the pump P and supplied to the third spray pipe 98.

That is, the P sent from the developing unit 24
The S plate 110 is drawn into the second washing unit 26 by the pair of conveying rollers 92 provided at the position where the second washing unit 26 is drawn in, and passes through the conveying path formed in the upper layer of the second washing tank. 2 spray pipe 96 and third spray pipe 9
8 is washed on both sides by the washing water sprayed from the second washing unit 26, and a pair of transport rollers 94 provided at the delivery position of the second washing unit 26.
The washing water that adheres to the second washing section 26
Sent out from.

A finisher section 28 is provided at a stage subsequent to the second washing section 26. This finisher section 28
Are a gum solution tank 100 and a gum solution spray nozzle 102 for spraying the gum solution onto the surface of the PS plate 110;
The gum solution is applied to the PS plate 110 after washing with water to desensitize it. The gum solution tank 100 is provided with an overflow pipe similarly to the other tanks, and is adjusted so that the water level in the tank is always kept constant.

The PS plate 1 sent from the second washing section 26
Reference numeral 10 denotes a gum that is ejected from the gum solution ejecting nozzle 102 to the image forming side of the surface when passing through the finisher unit 28, and then adheres to the conveying roller pair 104 provided at the delivery position of the finisher unit 28. The liquid is squeezed and sent out from the finisher unit 28.

A drying section 29 is provided downstream of the finisher section 28. When the PS plate 110 passes through the drying section 29, the PS plate 110 is dried and discharged to the outside. In addition,
Since a known configuration can be applied to the drying unit 29, the description is omitted here.

The PS plate used in the plate making system of the present embodiment may be any as long as it includes a photopolymerizable photosensitive layer and an overcoat layer (protective layer) for protecting the photosensitive layer.
Preferably, a compound having an addition-polymerizable ethylenic double bond, a photopolymerization initiation system activated by light having a wavelength of 450 nm or more, and a crosslinkable group are provided on a support obtained by subjecting an aluminum plate to a hydrophilic treatment. It is preferable to use a material having a photopolymerizable photosensitive layer containing the polymer having the above.

Hereinafter, a preferred PS plate will be described in detail. [Aluminum Support] First, the aluminum support of the PS plate is a dimensionally stable metal containing aluminum as a main component, and is made of aluminum or an aluminum alloy. In addition to a pure aluminum plate, it is selected from an alloy plate containing aluminum as a main component and containing a trace amount of a different element, or a plastic film or paper on which aluminum (alloy) is laminated or evaporated. Furthermore, Japanese Patent Publication No. 48-18
No. 327, a composite sheet in which an aluminum sheet is bonded on a polyethylene terephthalate film may be used.

In the following description, the above-mentioned substrates made of aluminum or aluminum alloy are collectively used as aluminum substrates. The foreign elements contained in the aluminum alloy include silicon, iron, manganese, copper, magnesium, chromium, zinc, bismuth, nickel and titanium, and the content of the foreign elements in the alloy is 10% by weight or less. In the present invention, a pure aluminum plate is preferable, but completely pure aluminum is difficult to produce due to refining technology, and therefore may contain a slightly different element. As described above, the composition of the aluminum plate applied to the present invention is not specified, and any of conventionally known and used materials such as JIS A 1050 and JISA 110 can be used.
0, JIS A 3103, JIS A 3005, and the like can be used as appropriate.

The thickness of the aluminum substrate used in the present invention is about 0.1 mm to 0.6 mm. This thickness can be appropriately changed according to the size of the printing press, the size of the printing plate, and the user's request. [Hydrophilic treatment] The above-mentioned aluminum substrate is appropriately subjected to a treatment such as graining described later, and then the surface of the substrate is subjected to a hydrophilic treatment with silicate or polyvinylphosphonic acid or the like. The film has a Si or P element content of 2 to
40 mg / m ^2, more preferably from 4 to 30 mg / m ² formed. In addition, the coating amount can be measured by a fluorescent X-ray analysis method.

In the above-mentioned hydrophilization treatment, the alkali metal silicate or polyvinylphosphonic acid is 1 to 30% by weight, preferably 2 to 15% by weight, and the pH at 25 ° C. is 10 to 10% by weight.
The aluminum substrate on which the anodized film is formed is immersed in the aqueous solution of No. 13 at, for example, 15 to 80 ° C. for 0.5 to 120 seconds.

As the alkali metal silicate, sodium silicate, potassium silicate, lithium silicate and the like can be used. Hydroxides used to increase the pH of the aqueous alkali metal silicate solution include sodium hydroxide, potassium hydroxide, and lithium hydroxide.

Incidentally, an alkaline earth metal salt or a Group IVB metal salt may be added to the above-mentioned treatment liquid. Alkaline earth metal salts include nitrates such as calcium nitrate, strolentium nitrate, magnesium nitrate and barium nitrate, and aqueous solutions such as sulfates, hydrochlorides, phosphates, acetates, oxalates and borates. Salts.

As the Group IVB metal salt, titanium tetrachloride,
Examples thereof include titanium trichloride, potassium titanium fluoride, potassium potassium oxalate, titanium sulfate, titanium tetraiodide, zirconium chloride, zirconium dioxide, zirconium oxychloride, and zirconium tetrachloride.

The alkaline earth metal salts or Group IVB metal salts can be used alone or in combination of two or more. The preferred range of these metal salts is 0.01 to 10
% By weight, and a more preferred range is 0.05 to 5.0% by weight.

Electrodeposition of silicate as described in US Pat. No. 3,658,662 is also effective. Further, JP-B-46-27481 and JP-A-52-5
No. 8602 and Japanese Patent Application Laid-Open No. 52-30503 are also useful in combination with a support provided with electrolytic grains and a surface treatment combining the above-described anodic oxidation treatment and hydrophilic treatment. [Hydrophilic undercoat layer] The following hydrophilic undercoat layer can be provided on the silicate-treated aluminum substrate as needed.

Water-soluble resins, for example, polyvinylphosphonic acid, polymers and copolymers having a sulfonic acid group in the side chain, polyacrylic acid, water-soluble metal salts (for example, zinc borate)
Alternatively, a primer coated with a yellow dye, an amine salt or the like is also suitable.

Examples of the organic compound used in the organic (resin) undercoat layer include carboxymethyl cellulose and
Dextrin, gum arabic, phosphonic acids having an amino group such as 2-aminoethylphosphonic acid, phenylphosphonic acid which may have a substituent, naphthylphosphonic acid,
Organic phosphonic acids such as alkyl phosphonic acid, glycerophosphonic acid, methylene diphosphonic acid and ethylene diphosphonic acid, phenylphosphoric acid which may have a substituent, naphthyl phosphoric acid, organic phosphoric acid such as alkyl phosphoric acid and glycerophosphoric acid, Organic phosphines such as phenylphosphinic acid, naphthylphosphinic acid, alkylphosphinic acid and glycerophosphinic acid which may have a substituent, amino acids such as glycine and β-alanine, and hydroquinol such as triethanolamine hydrochloride It is selected from hydrochlorides of amines having a group, but may be used as a mixture of two or more kinds.

The organic undercoat layer can be provided by the following method. That is, a method in which a solution obtained by dissolving the above organic compound in water or an organic solvent such as methanol, ethanol, or methyl ethyl ketone or a mixed solvent thereof is applied to an aluminum substrate and dried to form a solution, and water or methanol, ethanol, methyl ethyl ketone, or the like. An aluminum substrate is immersed in a solution obtained by dissolving the above organic compound in an organic solvent or a mixed solvent thereof to adsorb the organic compound, and then washed with water and dried to form an organic undercoat layer. Is the way. In the former method, a solution of the above organic compound having a concentration of 0.005 to 10% by weight can be applied by various methods. For example, any method such as bar coater coating, spin coating, spray coating, and curtain coating may be used. In the latter method, the concentration of the solution is 0.01 to 20% by weight, preferably 0.05 to 5% by weight, and the immersion temperature is 20 to 90 ° C.
Preferably, the temperature is 25 to 50 ° C., and the immersion time is 0.1 second to
20 minutes, preferably 2 seconds to 1 minute.

The solution used here may be a basic substance such as ammonia, triethylamine or potassium hydroxide, hydrochloric acid,
The pH is adjusted with an acidic substance such as phosphoric acid,
2 can be used. Further, a yellow dye can be added for improving the tone reproducibility of the photopolymerizable lithographic printing plate.

The coating amount of the organic undercoat layer after drying is from 2 to 20.
0 mg / m ² is suitable, preferably 5 to 100 mg.
/ M ² . If the coating amount is less than 2 mg / m ² , sufficient printing durability cannot be obtained. The same is true even if it is larger than 200 mg / m ² .

The aluminum support may be further subjected to a surface treatment such as immersion in an aqueous solution of potassium fluorozirconate, phosphate or the like. (Photopolymerizable photosensitive layer) The main components of the photopolymerizable photosensitive layer used in the present invention is a compound containing an addition-polymerizable ethylenic double bond, a photopolymerization initiator, an organic polymer binder and the like,
If necessary, various compounds such as a coloring agent, a plasticizer, and a thermal polymerization inhibitor are added.

The compound containing a double bond capable of addition polymerization is
It can be arbitrarily selected from compounds having at least one, preferably two or more terminal ethylenically unsaturated bonds.

For example, those having a chemical form such as a monomer, a prepolymer, ie, a dimer, a trimer and an oligomer, or a mixture thereof and a copolymer thereof.

Examples of monomers and copolymers thereof include esters of unsaturated carboxylic acids (eg, acrylic acid, methacrylic acid, itaconic acid, crotonic acid, isocrotonic acid, maleic acid, etc.) and aliphatic polyhydric alcohol compounds. And amides of unsaturated carboxylic acids and aliphatic polyamine compounds.

Specific examples of the ester monomer of the aliphatic polyhydric alcohol compound and the unsaturated carboxylic acid include acrylic acid esters such as ethylene glycol diacrylate, triethylene glycol diacrylate, and 1,3.
-Butanediol diacrylate, tetramethylene glycol diacrylate, propylene glycol diacrylate, neopentyl glycol diacrylate, trimethylolpropane triacrylate, trimethylolpropane tri (acryloyloxypropyl) ether, trimethylolethane triacrylate, hexanediol diacrylate 1,4-cyclohexanediol diacrylate, tetraethylene glycol diacrylate, pentaerythritol diacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol diacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, sorbitol Triacry Over DOO, sorbitol tetraacrylate, sorbitol pentaacrylate, sorbitol hexaacrylate, tri (acryloyloxyethyl) isocyanurate, polyester acrylate oligomer.

Examples of methacrylic acid esters include tetramethylene glycol dimethacrylate, triethylene glycol dimethacrylate, neopentyl glycol dimethacrylate, trimethylolpropane trimethacrylate, trimethylolethane trimethacrylate, ethylene glycol dimethacrylate, and 1,3-butanediol. Dimethacrylate, hexanediol dimethacrylate, pentaerythritol dimethacrylate, pentaerythritol trimethacrylate, pentaerythritol tetramethacrylate, dipesitaerythritol dimethacrylate, dipentaerythritol hexamethacrylate, dipentaerythritol pentamethacrylate, sorbitol trimethacrylate, sorbitol natramethacrylate , There is bis [p- (3--methacryloxy-2-hydroxypropoxy) phenyl] dimethyl methane, bis [p- (methacryloxyethoxy) phenyl] dimethyl methane.

Examples of itaconic acid esters include ethylene glycol diitaconate, propylene glycol diitaconate, 1,3-butanediol diitaconate,
There are 1,4-butanediol diitaconate, tetramethylene glycol diitaconate, pentaerythritol diitaconate, sorbitol tetritaconate and the like.

The crotonates include ethylene glycol dicrotonate, tetramethylene glycol dicrotonate, pentaerythritol dicrotonate,
Sorbitol tetradicrotonate and the like.

Examples of the isocrotonic acid ester include ethylene glycol diisocrotonate, pentaerythritol diisocrotonate, and sorbitol tetraisocrotonate.

Examples of the maleic acid ester include ethylene glycol dimaleate, triethylene glycol dimaleate, pentaerythritol dimaleate, and sorbitol tetramaleate.

Furthermore, a mixture of the above-mentioned ester monomers can also be mentioned.

Specific examples of the amide monomer of the aliphatic polyamine compound and the unsaturated carboxylic acid include methylene bis-acrylamide, methylene bis-methacrylamide, 1,6-hexamethylene bis-acrylamide, 1,6- Hexamethylene bis-methacrylamide,
Examples include diethylenetriaminetrisacrylamide, xylylenebisacrylamide, xylylenebismethacrylamide, and the like.

Another example is described in JP-B-48-417.
08 polyisocyanate compound having two or more isocyanate groups in one molecule described in
A bierurethane compound containing two or more polymerizable vinyl groups in one molecule to which a hydroxyl group-containing vinyl monomer represented by the following general formula (A) is added is exemplified.

CH ₂ ＣC (R ⁵ ) COO ₂ CH (R ⁶ ) OH (A) (where R ⁵ and R ⁶ represent H or CH ₃ ). Urethane acrylates described in JP-A-48-64183.
No., JP-B-49-43191, JP-B-52-3049
Polyfunctional acrylates and methacrylates such as polyester acrylates and epoxy acrylates obtained by reacting an epoxy resin with (meth) acrylic acid as described in JP-A Nos. 0-104, and 2005-112, respectively. Further, the Journal of the Adhesion Society of Japan vol. 20, no. 7, pages 300 to 308 (1984) as photocurable monomers and oligomers can also be used. In addition, the amount of these used is 5-70 weight% with respect to all components.
(Hereinafter abbreviated as%), preferably 10 to 50%.

Examples of the photopolymerization initiator include various photoinitiators known in patents and literatures, depending on the wavelength of the light source used.
Alternatively, a combination system (photoinitiating system) of two or more photoinitiators can be appropriately selected and used.

Various light-initiating systems have been proposed when using visible light of 450 nm or more, an Ar laser, the second harmonic of a semiconductor laser, or an SHG-YAG laser as a light source. For example, US Pat. No. 2,850. Certain photoreducing dyes, for example, rose bengal, eosin, erythrosine, and the like, or a system using a combination of a dye and an initiator, for example, a complex starting system of a dye and an amine (Japanese Patent Publication No. 44-20189). ), A combination of hexaarylbiimidazole, a radical generator and a dye (Japanese Patent Publication No. Sho 4)
5-37377), a system of hexaarylbiimidazole and p-dialkylaminobenzylidene ketone (JP-B-47-2528, JP-A-54-155292), and a system of a cyclic cis-α-dicarbonyl compound and a dye ( Kaisho 4
8-84183), a system of a cyclic triazine and a merocyanine dye (JP-A-54-151024), a system of 3-ketocoumarin and an activator (Tokikai Sho 52-112681, JP-A 58-15503), A system of imidazole, a styrene derivative, and a thiol (JP-A-59-140203);

A system of an organic peroxide and a dye (Japanese Unexamined Patent Publication No.
No. 504, JP-A-59-140203, JP-A-59-140203
No. 189340, JP-A-62-174203, JP-B-62-1641, U.S. Pat. No. 4,766,055), a system of a dye and an active halogen compound (JP-A-63-17181).
No. 05, JP-A-63-258903, Japanese Patent Application No. 2-63
No. 054), a system of a dye and a borate compound (JP-A-6
2-143044, JP-A-62-150242, JP-A-64-13140, JP-A-64-13141,
JP-A-64-13142, JP-A-64-13143
JP-A-64-13144, JP-A-64-1704
8, JP-A-1-229003, JP-A-1-2983
No. 48, JP-A-1-138204, etc., and a system of a dye having a rhodanine ring and a radical generator (JP-A No. 2-17)
No. 9643, JP-A-2-244050), a system of titanocene and 3-ketocoumarin dye (JP-A-63-22111).
No. 0), a system in which a titanocene is combined with a xanthene dye and an addition-polymerizable ethylenically unsaturated compound containing an amino group or a urethane group (JP-A-4-221958)
JP-A-4-219756), a system of titanocene and a specific merocyanine dye (JP-A-6-295061),
A dye system having a titanocene and a benzopyran ring (Japanese Patent Application No. Hei 7-164585) can be exemplified.

The titanocene compound used as a photopolymerizable initiation system in the present invention may be any titanocene compound capable of generating an active radical when irradiated with light in the presence of the above-mentioned sensitizing dye. For example, JP-A-59-152396, JP-A-61-151197
A known compound described in JP-A No. 5-211 can be appropriately selected and used.

More specifically, di-cyclopentadienyl-Ti-di-chloride, di-cyclopentadienyl-Ti-bis-phenyl, di-cyclopentadienyl-Ti-bis-2,3,3 4,5,6-pentafluorophenyl-1-yl (hereinafter also referred to as “A-1”), di-cyclopentadienyl-Ti-bis-2,3,5,6-tetrafluorophenyl-1- Yl, di-cyclopentadienyl-Ti-bis-2,4,6-trifluorophenyl
1-yl, di-cyclopentadiphenyl-Ti-bis-
2,6-difluorophenyl-1-yl, di-cyclopentadienyl-Ti-bis-2,4-difluorophenyl
1-yl, di-methylcyclopentadienyl-Ti-bis-2,3,4,5,6-pentafluorophenyl-1-
Yl (hereinafter also referred to as “A-2”), di-methylcyclopentadienyl-Ti-bis-2,3,5,6-tetrafluorophenyl-1-yl, di-methylcyclopentadienyl-Ti -Bis-2,4-difluorophenyl-1-
Il, bis (cyclopentadieel) -bis (2,6-
And difluoro-3- (pyrid-1-yl) phenyl) titanium (hereinafter also referred to as “A-3”).

The titanocene compounds used in the photopolymerizable composition can be used alone or in combination of two or more.

The amount of the photopolymerization initiator used is 0.05 to 10 parts by weight based on 100 parts by weight of the ethylenically unsaturated compound.
0 parts by weight, preferably 0.1 to 70 parts by weight, and more preferably 0.2 to 50 parts by weight.

The photopolymerizable composition usually contains an organic polymer as a binder. In the present invention, a polymer having a crosslinkable group in a side chain is used. Such an organic high molecular polymer (hereinafter also simply referred to as a polymer) itself has a crosslinkable group (also referred to as an unsaturated group) and a carboxyl group in a side chain, and the crosslinkable group has the following general formula: [I]

[0153]

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[Wherein R _{1 to} R ₅ are hydrogen, halogeno, carboxyl, sulfo, nitro, cyano, amide, amino, alkyl, aryl, each of which may have a substituent,
Alcoquin, aryloquin, alkylamino, arylamino, cyclic alkyl, alkylsulfonyl, arylsulfonyl, wherein Z is oxygen, sulfur, N
H or NR (R is an alkyl group)].

Further, polymers having a crosslinkable group in a side chain used as a binder for the photopolymerizable photosensitive layer are described in US Pat. Nos. 3,376,138 and 3,556,792.
No. 3,556,793, the disclosed polymer is a polymer itself,
It is used as a photocrosslinkable resist, and has a clear difference from the method of using the photopolymerizable composition described in this embodiment as a binder.

The methods for synthesizing the above polymers are roughly classified into the following two methods.

(Method A): A compound represented by the following general formula [Ia] is subjected to a polymer reaction with a backbone polymer having a carboxylic acid, a carboxylic acid halide, and a carboxylic anhydride group as a side chain,

[0158]

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(Wherein, R _{1 to} R ₅ have the same meanings as in the case of the general formula [I]): -COO-, -COS
-, -CONH- or -CONR- a method of introducing via each connecting group.

(Method B): A monomer having a crosslinkable group represented by the above general formula [I] and an ethylenically unsaturated group having a higher addition polymerization reactivity than the crosslinkable group is converted into an unsaturated carboxylic acid. A method of obtaining a polymer by copolymerization.

[0161]

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[Wherein, R _{1 to} R ₅ have the same meanings as in the case of the general formula [I], and Y represents OH, —SH, —NH ₂ , —NHR
(R is an alkyl group) or a halogen atom. The alkyl group of R _{1 to} R _{5 in} the general formula [Ia] is
It may be linear, branched, or cyclic, and has 1 to 7 carbon atoms.
Preferably has, even in these alkyl group, an alkoxy group having from 1 to 2 carbon atoms, an alkoxycarbonyl group having 1 to 3 carbon atoms, a phenyl group may have a substituent such as hydroxy group, R ₁ As the aryl group represented by R ₅ to R _5, a phenyl group and a furyl group are preferable, including a halogeno group (eg, chloro, bromo, etc.), a hydroxy group,
May have a substituent such as an alkyl group, an aryl group (e.g., phenyl and methkinphenyl), an alkoxy group having 1 to 7 carbon atoms, a nitro group, an amino group, and an N, N-dialkylamino group. . The alkoxy group of R _{1 to} R ₅ is preferably a group having 1 to 7 carbon atoms, and the aryloxy group is preferably a phenyl okine group, which has a substituent such as an alkyl or alkoxy group having 1 to 7 carbon atoms. May be. The alkylamino group of R _{1 to} R ₅ is preferably a group having 1 to 15 carbon atoms, and the arylamino group is preferably a phenylamino group or a naphthylamino group. The alkylsulfonyl group represented by R _{1 to} R ₅ is preferably a group having 1 to 15 carbon atoms, and the arylsulfonyl group is preferably a phenylsulfonyl group. May have a substituent such as an alkoxy group and an amino group.

When the method A is described in more detail, examples of the backbone polymer include a copolymer of acrylic acid or methacrylic acid and a copolymer in which the copolymer is an acid halide obtained by a polymer reaction. Further, copolymers such as maleic anhydride and itaconic anhydride can be used. Examples of the comonomer to be copolymerized include styrene or an alkyl-substituted derivative thereof, an alkyl acrylate, an aryl acrylate, an alkyl methacrylate, an aryl methacrylate, or an aliphatic vinyl ester. Preferably acrylic acid or methacrylic acid and methyl acrylate, ethyl acrylate, butyl acrylate, benzyl acrylate, methyl methacrylate,
Copolymers with ethyl methacrylate, butyl methacrylate, and benzyl methacrylate are exemplified. In order to introduce a crosslinkable group into these copolymers, a crosslinkable alcohol, an amine, a thiol, or a halide represented by the general formula [Ia] is reacted with the above copolymer in a reaction solvent under predetermined reaction conditions. It is obtained by mixing and dissolving, adding a reaction catalyst and a polymerization inhibitor, and heating. Specifically, a copolymer of methacrylic acid and benzyl methacrylate is shown below as an example.

Poly (methacrylic acid / benzyl methacrylate = 27/73) was placed in a 300 ml three-necked flask equipped with a stirring rod and stirring blades, a reflux condenser and a thermometer.
19.8 g), 40.2 g of ethylene glycol monomethyl ether acetate as a reaction solvent, 6.0 g of allyl bromide as a reagent containing a crosslinkable group, and 10.4 g of trimethylbenzylammonium hydroxide as a catalyst.
g of paramethoxyphenol and 0.1 g of paramethoxyphenol as a polymerization inhibitor.
And mixed and dissolved at 70 ° C. in a nitrogen atmosphere.
Heating and stirring were performed for hours. After cooling, methyl ethyl ketone is added to remove free quaternary salts. Further, the mixture is diluted with methanol and poured into dilute hydrochloric acid to precipitate. After washing with water, suction filtration and vacuum drying, the yield of polymer obtained is 1
It was 3.6 g. Allyl groups were introduced at 35% relative to the carboxylic acid of the backbone polymer.

[0165]

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A synthesis example in which the crosslinkable group is introduced into a copolymer of maleic anhydride can be carried out by the method described in US Pat. No. 2,047,398, whereby the maleic anhydride moiety is formed. A ring-opened unsaturated ester, amide, thioester or the like is introduced. As a method for introducing a crosslinkable group into a maleic anhydride copolymer, JP-A-48-82
A similar example described in Japanese Patent Application Laid-Open No. 902/1990 is mentioned, but the crosslinkable group by this method is bonded to the nitrogen atom of maleic imide, and is clearly a compound different from the above-mentioned polymer, and is used in the present invention. Polymer having a crosslinkable group in the side chain.

On the other hand, when the method B is described in more detail, the monomer containing at least two or more carbon-carbon double bonds having a crosslinkable group can be prepared by a known synthesis method using an alcohol, an amine or a thiol having the crosslinkable group. And unsaturated carboxylic acids,
Preferably, it is synthesized by a condensation reaction with acrylic acid or methacrylic acid. By copolymerizing the monomer containing at least two or more unsaturated groups with an unsaturated carboxylic acid, preferably acrylic acid or methacrylic acid, a copolymer having the crosslinkable group is obtained. The monomer to be copolymerized may further be copolymerized with another monomer in addition to the unsaturated carboxylic acid, for example, alkyl acrylate, alkyl methacrylate, benzyl methacrylate, 2-hydroquinethyl methacrylate, acrylonitrile, and the like. No.

The following is an example of copolymerization of allyl methacrylate and methacrylic acid. As a similar synthesis method, a method described in US Pat. No. 2,047,398 can be mentioned.

1.68 liters of 1,2-dichloroethane as a reaction solvent was placed in a 3 liter four-necked flask equipped with a stirring rod and a stirring blade, a reflux condenser, a dropping funnel and a thermometer, and heated to 70 ° C. while purging with nitrogen. did. 100.8 g of allyl methacrylate, 7.6 g of methacrylic acid, and 1.68 g of 2,2′-azobis (2,4-dimethylvaleronitrile) as a polymerization initiator were added to a dropping funnel in an amount of 0.1 g.
The mixture was dissolved in 44 liters of 1,2-dichloroethane, and the mixed solution was dropped into the flask over 2 hours with stirring.

After completion of the dropwise addition, the mixture was further stirred at a reaction temperature of 70 ° C. for 5 hours to complete the reaction. After the completion of heating, 0.04 g of paramethokine phenol was added as a polymerization inhibitor, and the reaction solution was added to 50 parts.
The solution was concentrated to 0 ml, and the concentrated solution was added to 4 liters of hexane to precipitate. After vacuum drying, 61 g (yield 56%) of a copolymer was obtained. At this time, the viscosity was [η] = 0.068 for methyl ethyl ketone at 80 ° C.

Representative compounds represented by the above formula [Ia] include allyl alcohol, 2-methylallyl alcohol, crotyl alcohol, 3-chloro-2-propen-1-ol, and 3-phenyl-2. -Propen-1-ol, 3- (hydroquinphenyl) -2-propen-1-
All, 3- (2-hydroxyphenyl) -2-propen-1-ol, 3- (3.4-dihydroxyphenyl) -2-propen-1-ol, 3- (2.4-dihydroxyphenyl-2-ol Propen-1-ol, 3-
(3,4-5-trihydroquinphenyl) -2-propen-1-ol, 3- (3-methoxy-4-hydroquinphenyl) -2-propen-1-ol, 3- (3.4
-Dihydroxy-5-methoxyphenyl) -2-propen-1-ol, 3- (3.5-dimethoxy-4-hydroxyphenyl) -2-propen-1-ol, 3-
(2-hydroxy-4-methylphenyl) -2-propen-1-ol, 3- (4-methoxyphenyl) -2-
Propen-1-ol, 3- (4-ethoxyquinphenyl)
-2-propen-1-ol, 3- (2-methoxyphenyl) -2-propen-1-ol, 3- (3-4-dimethoxyphenyl) -2-propen-1-ol, 3-
(3-methoxy-4-propoxyphenyl) -2-propen-1-ol,

3- (2-4,6-trimethoxyphenyl) -2-propen-1-ol, 3- (3-methoxy-4-benzyloxyphenyl) -2-propen-1-
All, 3-1- (3′-methokinphenyl) -4-benzyloxyphenyl) -2-propen-1-ol,
3-phenoxy-3-phenyl-2-propen-1-ol, 3- (3.4.5-trimethoxyphenyl) -2
-Propen-1-ol, 3- (4-methylphenyl)
-2-propen-1-ol, 3-phenyl-3- (2
* 4,6-trimethylphenyl) -2-propene-1-
All, 3,3- {di- (2,4,6-trimethylphenyl)}-2-propen-1-ol, 3-phenyl-
3- (4-methylphenyl) -2-propen-1-ol, 3,3-diphenyl-2-propen-1-ol,
3- (2-chlorophenyl) -2-propen-1-ol, 3- (3-chlorophenyl) -2-propen-1-
All, 3- (4-chlorophenyl) -2-propene-
1-ol, 3- (2.4-dichlorophenyl) -2-
Propen-1-ol, 3- (2-bromophenyl)-
2-propen-1-ol, 3-bromo-3-phenyl-2-propen-1-ol, 3-chloro-3-phenyl-2-propen-1-ol, 3- (4-nitrophenyl) -2 -Propen-1-ol,

3- (2-nitrophenyl) -2-propen-1-ol, 3- (3-nitrophenyl) -2-propen-1-ol, 2-methyl-3-phenyl-2-
Propen-1-ol, 2-methyl-3- (4-chlorophenyl) -2-propen-1-ol, 2-methyl-
3- (4-nitrophenyl) -2-propen-1-ol, 2-methyl-3- (4-aminophenyl) -2-propen-1-ol, 2-methyl-3-3.3-diphenyl-2- Propen-1-ol, 2-ethyl-1 / 3-diphenyl-2-propen-1-ol, 2-ethoxymethylene-3-phenyl-2-propen-1-ol, 2
-Phenoxy-3-phenyl-2-propen-1-ol, 2-methyl-3- (4-methoxyphenyl) -2-
Propen-1-ol, 2,3-diphenyl-2-propen-1-ol, 1,2,3-triphenyl-2-propen-1-ol, 2,3,3-triphenyl-2-
Propen-1-ol, 2-ethoxy-3-phenyl-
2-propen-1-ol, 1.3-diphenyl-2-
Propen-1-ol, 1- (4-methylphenyl)-
3-phenyl-2-propen-1-ol, 1-phenyl-3- (4-methylphenyl) -2-propen-1-
All, 1-phenyl-3- (4-methoxyphenyl)
-2-propen-1-ol, 1- (4-methoxyphenyl) -3-phenyl-2-propen-1-ol,

1,3-di (4-chlorophenyl) -2-
Propen-1-ol, 1- (4-bromophenyl)-
3-phenyl-2-propen-1-ol, 1-phenyl-3- (4-nitrophenyl) -2-propen-1-
All, 1,3-di (2-nitrophenyl) -2-propen-1-ol, 1- (4-dimethylaminophenyl) -3-phenyl-2-propen-1-ol, 1-
Phenyl-3- (4-dimethylaminophenyl) -2-
Propen-1-ol, 1,1-di (4-dimethylaminophenyl) -3-phenyl-2-propen-1-ol, 1.1,3-triphenyl-2-propen-1-ol, 1. 1,3,3-tetraphenyl-2-propen-1-ol, 1- (4-methylphenyl) -3-phenyl-2-propen-1-ol, 1- (dodecylsulfonyl) -3-phenyl-2 -Propen-1-ol,
1-phenyl-2-propen-1-ol, 1,2-diphenyl-2-propen-1-ol, 1-phenyl-
2-methyl-2-propen-1-ol, 1-cyclohexyl-2-propen-1-ol, 1-phenoxy-
2-propen-1-ol, 2-benzyl-2-propen-1-ol, 1.1-di (4-chlorophenyl)-
2-propen-1-ol, 1-carboxy-2-propen-1-ol,

1-carboxamido-2-propene-1
-Ol, 1-cyano-2-propen-1-ol, 1
-Sulfo-2-propen-1-ol, 2-ethoxy-
2-propen-1-ol, 2-amino-2-propen-1-ol, 3- (3-amino-4-methoxyphenylsulfonyl) -2-propen-1-ol, 3- (4
-Methylphenylsulfonyl) -2-propen-1-ol, 3-phenylsulfonyl-2-propen-1-ol, 3-benzylsulfonyl-2-propen-1-ol, 3-anilinosulfonyl-2-propene- 1-ol, 3- (4-methoxyanilinosulfonyl) -2-
Propen-1-ol, 8-anilino-2-propene-
1-ol, 3-naphthylamino-2-propene-1-
All, 3-phenoxy-2-propen-1-ol,
3- (2-methylphenyl) -2-propen-1-ol, 3- (3-methylphenokine) -2-propen-1
-Ol, 3- (2,4-dimethylphenyl) -2-propen-1-ol, 1-methyl-3-carboxy-2
-Propen-1-ol, 3-carboxy-2-propen-1-ol, 3-bromo-3-carboxy-2-propen-1-ol, 1-carboxy-3-chloro-3
-Methyl-2-propen-1-ol, 1-carboxy-3-methyl-2-propen-1-ol,

1- (2-carbethoxyisopropyl)-
3-methyl-2-propen-1-ol, 1- (1-carbethoxypropyl) -2-propen-1-ol,
-(1-carbethoxyethyl) -3-methyl-2-propen-1-ol, 1-carbethoxy-3-chloro-3
-Methyl-2-propen-1-ol, 1-carbethoxymethylene-3-methyl-2-propen-1-ol,
1-amido-2 / 3-dimethyl-2-propen-1-ol, 1-cyano-3-methyl-2-propen-1-ol, 3-sulfo-2-propen-1-ol, 3-butoxy- 2-propen-1-ol, 1-cyclohexyl-3- (2-hydroxycyclohexyl) -2-propen-1-ol, 3-cyclobenzyl-2-propen-1-ol, 3-furyl-2- Propen-1-ol, 3-chrom-2-propen-1-ol, 3-bromo-2-propen-1-ol, 2-methyl-3-chloro-2-propen-1-ol, 2-methyl- 3-bromo-2-propen-1-ol, 1-carboisobutoxy-3-chloro-3-methyl-2-propen-1-ol, 2-chloro-3-phenyl-2-propen-1-ol ( 2-chlorosi Cinnamyl alcohol), 2-bromo-3-phenyl-2-propen-1-ol (2-bromo cinnamyl alcohol),

2-bromo-3- (4-nitrophenyl)
-2-propen-1-ol, 2-fluoro-3-phenyl-2-propen-1-ol (2-fluorocinnamyl alcohol), 2-fluoro-3- (4-methoxyphenyl) -2-propene- 1-ol, 2-nitro-
3-chloro-3-phenyl-2-propen-1-ol, 2-nitro-3-phenyl-2-propen-1-ol (2-nitrocinnamyl alcohol), 2-cyano-3-phenyl-2-ol Propen-1-ol (2-cyanocinnamyl alcohol), 2-chloro-2-propen-1-ol (2-chloroallyl alcohol), 2-bromo-2-propen-1-ol (2-bromoallyl alcohol) ), 2-carboxy-2-propen-1-ol (2-carboxyallyl alcohol), 2-carbethoxy-2-propen-1-ol (2-carbethoxyallyl alcohol), 2-sulfonic acid-2-propene- 1
-Ol (2-allyl alcohol sulfonate), 2-nitro-2-propen-1-ol (2-nitroallyl alcohol), 2-bromo-3 / 3-difluoro-2-propen-1-ol, 2- Chlor-3-3-difluoro-2-propen-1-ol, 2-fluoro-3-chloro-2-propen-1-ol, 2,3-dibromo-3
-Carboxy-2-propen-1-ol,

2,3-diiodo-3-carboxy-2-
Propen-1-ol, 2,3-dibromo-2-propen-1-ol, 2-chloro-3-methyl-2-propen-1-ol. In the above specific examples, a compound in which the alcohol at the 1-position is replaced with a thioalcohol, an amine or a halogen can of course be used.

The preferable range of the crosslinkable group content in the polymer is 10 to 90 mol%,
60 mol%, a more preferable range is 20 to 70 mol%,
0 to 40 mol%.

Similarly, there are acidic cellulose derivatives having a carboxylic acid group in the side chain. In addition, those obtained by adding a cyclic acid anhydride to an addition polymer having a hydroxyl group are useful. In particular, among these, [benzyl (meth) acrylate / (meth) acrylic acid / optionally other addition-polymerizable vinyl monomers] copolymer and [allyl (meth) acrylate (meth) acrylic acid / optionally Other addition-polymerizable vinyl monomers) copolymers are preferred. In addition, as the water-soluble organic polymer, polybierpyrrolidone, polyethylene oxide and the like are useful. In order to increase the strength of the cured film, alcohol-soluble polyamides and polyethers of 2,2-bis- (4-hydroquinphenyl) -propane and epichlorohydrin are also useful.
These organic high-molecular polymers can be mixed in an arbitrary amount in the entire composition. However, if it exceeds 90% by weight, no favorable result is obtained in view of the strength of the formed image and the like. Preferably 10 to 90%, more preferably 30 to 8
0%. The weight ratio of the photopolymerizable ethylenically unsaturated compound and the organic high molecular weight polymer is preferably in the range of 1/9 to 9/1. A more preferred range is 2/8 to 8 /
2, more preferably 3/7 to 7/3.

In the present invention, in addition to the above basic components, a small amount of thermal polymerization is inhibited to prevent unnecessary thermal polymerization of a polymerizable ethylenically unsaturated compound during the production or storage of the photosensitive composition. It is desirable to add an agent. Suitable thermal polymerization inhibitors include haloid quinone, p-
Methkinphenol, di-t-butyl-p-cresol, pyrogallol, t-butylcatechol, benzoquinone, 4,4'-thiobis (3-methyl-6-t-butylphenol), 2,2'-methylenebis (4- Methyl-
6-t-butylphenol), cerium N-nitrosophenylhydroxylamine, aluminum aluminum N-nitrosophenylhydroxylamine and the like.
The addition amount of the thermal polymerization inhibitor is preferably from about 0.01% to about 5% based on the weight of the whole composition. Further, if necessary, a higher fatty acid derivative such as behenic acid or behenic acid amide may be added to prevent polymerization inhibition by oxygen, and may be unevenly distributed on the surface of the photosensitive layer in a drying process after coating. . The amount of the higher fatty acid derivative added is about 0.5% to about 1% of the total composition.
0% is preferred.

Further, a coloring agent may be added for the purpose of coloring the photosensitive layer. As the colorant, for example, a phthalocyanine-based pigment (CI Pigment Blue 15:
3, 15: 4, 15: 6), azo pigments, carbon black, pigments such as titanium oxide, ethyl violet, crystal violet, azo dyes, anthraquinone dyes, and cyanine dyes. The amount of dye and pigment added is preferably about 0.5% to about 20% of the total composition.

In addition, additives such as inorganic fillers and plasticizers such as dioctyl phthalate, dimethyl phthalate and tricresyl phosphate may be added in order to improve the physical properties of the cured film.

The amount of these additives is preferably 10% or less of the total composition.

When the photopolymerizable composition is coated on a support, it is used after being dissolved in various organic solvents. As the solvent used here, acetone, methyl ethyl ketone,
Cyclohexane, ethyl acetate, ethylene dichloride,
Tetrahydrofuran, toluene, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol dimethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, acetylacetone, cyclohexanone, diacetone alcohol, ethylene glycol monomethyl ether acetate, ethylene glycol ethyl ether acetate, Ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether acetate, 3-methoxypropanol, methoxymethoxyethanol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether Ether, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, 3-meth Kin-propyl acetate, N, N- dimethylformamide, dimethyl sulfoxide, .gamma.-butyrolactone, methyl lactate and ethyl lactate. These solvents can be used alone or as a mixture. The appropriate concentration of the solid content in the coating solution is 1 to 50% by weight.

A surfactant can be added to the photopolymerizable composition of the present invention in order to improve the coated surface quality.

The coating amount is about 0. lg /
range of m ² ~ about 10 g / m ² are suitable. More preferably, it is 0.3 to 5 g / m ² . More preferably 0.5 to
3 g / m ² . [Overcoat layer] The overcoat layer of the present invention (C) is an oxygen-blocking overcoat layer, and this overcoat layer contains a water-soluble vinyl polymer. The water-soluble vinyl polymer contained in the overcoat layer contains polyvinyl alcohol and its partial esters, ethers and acetal, or a substantial amount of terminally substituted vinyl alcohol units that have the necessary water solubility. The copolymer is mentioned. Polyvinyl alcohol is hydrolyzed by 71 to 100% and has a degree of polymerization of 3
Those having a range of from 00 to 2400 are exemplified. Specifically, Kuraray Co., Ltd. PVA-105, PvA-110, P
VA-117, PVA-117H, PVA-120, P
VA-124, PVA-124H, PVA-CS, PV
A-CST, PVA-HC, PVA-203, PVA-
204, PVA-205, PVA-210, PVA-2
17, PVA-220, PVA-224, PVA-21
7EE, PVA-220, PVA-224, PVA-2
17EE, PVA-217E, PVA-220E, PV
A-224, PVA-405, PVA-420, PVA
-613, L-8 and the like. The above-mentioned copolymers include polyvinyl acetate chloroacetate or propionate, polybierformal and polybieracetal hydrolyzed 88 to 100%, and copolymers thereof. Other useful polymers include polyvinylpyrrolidone, gelatin and gum arabic, which may be used alone or in combination.

The solvent used for applying the overcoat layer is preferably pure water, but alcohols such as methanol and ethanol, and ketones such as acetone and methyl ethyl ketone may be mixed with the pure water. The concentration of the solid content in the coating solution is suitably from 1 to 20% by weight.

Further, known additives such as a surfactant for improving coating properties and a water-soluble plasticizer for improving physical properties of the film may be added to the overcoat layer. Examples of the water-soluble plasticizer include propionamide, cyclohexanediol, glycerin, and sorbitol. Further, a water-soluble (meth) acrylic polymer or the like may be added.

The amount of the coating is about 0.1 / m 2 after drying.
A range from ² to about 15 / m ² is suitable. More preferably, it is 1.0 / m ² to about 5.0 / m ² .

In this embodiment, one personal computer is connected online to the workstation 12 for the sake of explanation. However, the number of personal computers is not limited to one, and a plurality of personal computers can be connected online. Similarly,
In the present embodiment, for the sake of explanation, one PS plate processor 16 is connected online to the plate setter 14, but the present invention is not limited to one, and a plurality of personal computers can be connected online to the plate setter 14.

When a plurality of personal computers are connected online to the plate setter 14, conditions such as changing heating conditions can be set more efficiently, so that the loss time can be reduced and the efficiency is improved.

In this embodiment, the image data output from the workstation is a TIFF file. Of course, the present invention is not limited to a TIFF file. A standard PPF file containing image data such as a PPF file composed of transfer characteristic curves, types of registration marks, color density information for quality control of position data, and information of trimming marks and cutting. Formatted image data can be used.

In the present embodiment, the plate setter 14 and the PS plate processor 16 are connected online. However, the present invention is not limited to the online connection, and the plate setter 14 and the PS plate processor 16 may be connected via a communication line. The information of the plate setter 14 may be stored on the medium as setter information, and the storage medium may be read by the PS version processor 16 to transfer the setter information.

In this embodiment, the case where the ROM stores the standard heating capacity table corresponding to the combination of the plate type, plate thickness, and plate size has been described. At least one of a heating capacity table, a standard heating capacity table according to the plate thickness, and a standard heating capacity table according to the plate size is stored, and the standard heating capacity is stored based on the stored table. It may be determined.

For example, when using a halogen lamp heater having a diameter of 2.50 mm coated with black as the heating device 32 and transporting the PS plate 110 at 19 mm / sec, a table having a standard heating capacity according to the plate thickness is used. 98V, 0.24mm when thickness is 0.15mm
Is 137 V, 0.3 mm is 165 V, 0.
In the case of 4 mm, a table is used in which the drive voltage is increased as the thickness of the aluminum substrate increases, such as 200 V, according to the plate thickness.

In the present embodiment, the heating capacity determination program is stored in the ROM of the setter control unit 18. However, the present invention is not limited to this, and the heating capacity determination program may be stored on a floppy disk. Alternatively, the computer may be provided with a hard disk, and the program may be read from a floppy disk and installed on the hard disk. Further, the heating capacity determination program may be transmitted to a wired or wireless network by a transmission means such as a telephone line and installed.

The heating capacity determination program is not limited to being stored on a floppy disk, but may be a CD-R.
OM, the program is stored on a magnetic tape, and the CD-R
It may be installed on the hard disk of the personal computer from OM or magnetic tape. Further, a hard disk storing the heating capacity determination program may be provided. Further, the heating capacity determination program may be directly written in the hard disk or RAM of the personal computer. As described above, the heating capacity determination program can be distributed by at least one of a tangible recording medium and a transmission unit.

In the above description, an example in which the heating condition is controlled by controlling the driving voltage of the heater has been described. However, the heating condition is controlled by controlling the transport speed of the PS plate while keeping the driving voltage of the heater constant. May be controlled,
The heating condition may be controlled by a shutter mechanism that provides a heat insulating plate and shuts off heat from the heater.

[0200]

As described above, according to the present invention, there is no danger that a set temperature condition is inappropriate or a loss due to a difference in the set temperature condition due to an operation error or the like does not occur, and the processing efficiency is improved. There is an effect that it can be done.

Further, the time until the temperature in the heating device reaches an appropriate temperature can be switched efficiently, so that
There is an effect that the processing efficiency can be increased by shortening the loss time, and thereby energy saving can be achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a schematic flow of a plate making system according to an embodiment.

FIG. 2 is an explanatory diagram showing a schematic configuration of the automatic developing machine shown in FIG.

FIG. 3 is a flowchart illustrating an operation of a CPU of a heating control unit illustrated in FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Personal computer 12 Workstation 14 Plate setter 16 PS plate processor 18 Setter control part 20 Heating part 22 Washing part 24 Developing part 26 Washing part 28 Finisher part 29 Drying part 30 Processor control part 31, 62, 68, 72, 75, 92, 94, 104
Roller pair 32 Heating device 34 Heating means 36 Conveying roller 38 Heating control unit 60 Washing tank 61, 79, 91 Overflow pipe 63 Washing water tank 64a, 64b Washing water supply nozzle 66, 71a, 71b Rotary brush roller 67 Backup roller 70 Developing tank 73 Liquid surface cover 74 Developer injection nozzle 76 Dilution water injection nozzle 77 Guide plate 78, 96, 98 Spray pipe 80 Waste liquid tank 82 Developer storage tank 84 Water storage tank 90 Rinse tank 93 Storage tank 100 Gum liquid tank 102 Gum liquid injection Nozzle 110 PS version

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H096 AA07 BA05 CA03 CA12 CA20 EA04 FA01 FA05 GA08 GA26 GA27 GB02 HA02 2H097 AB05 CA17 DB07 DB13 FA02 HA05 HB03 HB05 JA03 LA03

Claims (3)

[Claims] An exposure step of exposing a lithographic printing plate having a photopolymerizable photosensitive layer based on image data; and before or after the exposure step, based on the plate information used in the preceding step, the exposure step. A heating condition determining step of determining a heating condition for heating the exposed lithographic printing plate; and heating the lithographic printing plate on which the exposed image is formed so as to satisfy the heating condition determined in the heating condition determining step. And a developing step of introducing the lithographic printing plate heated in the heating step into a developing tank to develop the lithographic printing plate. 2. A heating means for heating the lithographic printing plate before development of an exposed lithographic printing plate having a photopolymerizable photosensitive layer, and an exposure comprising the photopolymerizable photosensitive layer by the heating means. When heating the processed lithographic printing plate, heating control is performed based on plate information input from a device provided in the preceding stage, and heating control is performed so as to satisfy the determined heating condition. And an automatic developing machine comprising: 3. Prior to development of an exposed lithographic printing plate having a photopolymerizable photosensitive layer, heating conditions are determined based on plate information input from an apparatus provided at a preceding stage, and the determined heating conditions are determined. A computer-readable recording medium recording a program for heating the lithographic printing plate so that the lithographic printing plate is heated under heating conditions.