JPH06100817B2 - Method for making original film for plain net - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an area in a printed matter where color and density are constant,
The present invention relates to an apparatus for producing a so-called solid mesh portion film original plate.

(Prior Art) A large number of plain net parts are present in a color printed matter, but the plate making process of this plain net part is carried out in a special process different from the general color part, so-called tone making plate making process.
The conventional process will be described below with reference to the drawings.

FIG. 9 shows an example of a printed matter composed of a plain mesh portion. In the figure, printed matter 250 is person 251, mark 25
2, 252 and a character portion 253, the areas A1, A2, the areas B1 to B6, the area C1, the areas D1 to D3, the areas E1 and E2, and the contour line S and the character W have a constant color and density, respectively. ing. The plate making of such a printed matter 250 is performed as follows.

First, a block copy document 260 as shown in FIG. 10 is created. This is a drawing in which only the contour lines appearing in the printed matter 250 shown in FIG. 14 are drawn. Based on this block copy document 260, a color instruction sheet 265 as shown in FIG. 11 is created. This color instructions 2
A contour line corresponding to the contour line drawn on the block copy manuscript 260 is roughly drawn on the area 65, and an area A to be surrounded by the rough contour is drawn.
E has a color instruction as shown in the figure. Here, Y10, M50, and C20 in the area A are the halftone dot area ratio (hereinafter referred to as "halftone dot%") of the yellow plate when the decomposed plate is created, 10% of the halftone dot of the magenta plate, and the cyan plate. The net% of the black plate is 20%, and the net% of the black plate is 0%.

Next, a camera image of the block original 260 shown in FIG.
2 A positive 271 and a negative 272 as shown in FIGS. Positive 271 is the area A to E shown in the color instruction sheet 265.
Used to create the mask corresponding to. The mask is a laminate of a colorless transparent base film and a light-shielding film, and the light-shielding film can be easily peeled off from the base film, and only the portion where the light-shielding film is peeled off transmits light. Therefore, a desired mask can be produced by cutting the light-shielding film along the contour line of the positive 271 and cutting the light-shielding film by overlapping the positive 271 and the mask.

FIGS. 13 (a), (b), (c), (d), and (e) show the prepared mask, and the area without diagonal lines is the portion where the light-shielding film is peeled off. In the figure masks 281-2
Reference numerals 85 correspond to the areas A to E, respectively. That is, the mask 281 hides areas other than the areas A1 and A2 of the printed matter 250 shown in FIG. 9, the mask 282 hides areas other than the areas B1 to B6 of the printed matter 250, and the mask 283 hides areas other than the area C1 of the printed matter 250. The mask 284 hides areas other than the areas D1 to D3 of the printed matter 250, and the mask 28
Reference numeral 5 hides areas other than the areas E1 and E2 of the printed matter 250.

Next, a transparent film having halftone dots uniformly provided at a predetermined halftone percentage (hereinafter referred to as "flat halftone") and the above masks 281-2.
A film master for each color is prepared by using 85 and this is done by overlaying a mask and a flat screen onto the film master and printing it to form halftone dots only on desired portions of the film master.

FIG. 14 shows an outline of the steps from the block copy original 260 to the production of the printed matter 250, which is 291, 292, 293, 294,
295 and 296 are flat nets, and the net percentages are 100%, 20% and 1 respectively.
It is 0%, 50%, 30%, 8%. Incidentally, these various flat screens are prepared in advance. As shown, block copy manuscript 26
As described above, the positive 271 and the negative 272 are created from 0, and the masks 281-285 are created from the positive 271.

Here, the method for producing the yellow plate 241 will be described. For this production, the masks 281, 282, 283, 284 and the flat net 29 are used.
1,292,293 are used. First, mask 281 and flat net 291
And 10 are overlapped with each other and baked on the film original plate to form 10% halftone dots in the area A. Then, the mask 282 and the flat screen 292 are printed on top of each other, the mask 283 and the flat screen 292 are further printed on top of each other, and finally the mask 284 and the flat screen 291 are stacked on top of each other and printed on the same region B, C of the same film original plate, A yellow plate 241 is prepared by forming halftone dots of 20%, 20%, and 100% on D, respectively. Similarly, from the masks 281, 282, 283 and the flat nets 294, 295, 293, the magenta plate 242, the masks 281, 282, 283, 285 and the flat net 292,
Cyan version 243 is created from 293 and 296.

Further, since the black plate 244 is composed only of the contour lines or ruled lines drawn on the block copy document 260 shown in FIG. 10, no mask is used and the negative 272 and the flat net 291 shown in FIG. Created. That is, by overlaying the negative 272 and the flat net 291 and baking it on the film original plate,
100% halftone dots are formed, and the black plate 244 is created.

Yellow version 241, magenta version 2 created in this way
A printing plate is created from 42, cyan plate 243, and black plate 244, and overprinted using ink and paper, and printed matter 50
Is created.

As described above, the conventional plate making process of the plain net part is a complicated process using various masks and flat screens, and all of it is done manually, so it takes a long time to make the final film original plate of each color. In addition to the above, there is a problem that an error in the position of the pattern is likely to occur in the work of forming the mask and the overprinting, and it is difficult to obtain a desired printed matter. This problem was more remarkable as the design became more complicated. Then, the applicant of the present invention has proposed an apparatus for performing all the plate-making process of the solid mesh portion which is manually performed by using a computer, thereby improving the efficiency of the plate-making process. There is.

Here, in the apparatus for performing the plate making process of the plain net portion using the computer, when reading the line image of the block copy document from the scanner, it is read at a considerably coarse resolution,
After coloring by the computer, the resolution of the image data read by the scanner is increased to the resolution for making the film original plate by the interpolation process, and the smoothing process is performed to remove the roughness of the ruled line part caused by this interpolation process. ing.

(Problems of the prior art) However, the smoothing process described above not only requires a long time, but cannot completely remove the roughness of the ruled line portion, which is not suitable for printed matter requiring high quality. It was happening.

(Object of the Invention) The present invention has been made in view of the above problems, and a line image drawn on a block original is read by a scanner or the like, and a computer is used based on the read image data. From the device that directly produces the film originals of each color by performing the coloring process, the halftone original of the part excluding the ruled lines is created, and the ruled lines are created directly from the negative or positive of the block copy manuscript. It is an object of the present invention to provide a method for synthesizing original plates to produce a film original plate for plain netting.

(Summary of the Invention) To achieve this object, the present invention provides an image reading unit that reads a line image drawn on a document, and an image data storage unit that stores the image read by the image image reading unit.
An image display means for reading the data stored in the image data storage means to display the line image, a color designating means for designating a color to be colored, and an area to be colored in the image displayed on the image display means. Colored area designating means for designating an arbitrary point within the colored area, coloring means for coloring the area designated by the colored area designating means with a color designated by the color designating means, and colored image data obtained by the coloring means. Color image data registration means for registering only the color image data stored in the image data storage means, and resolution changing means for changing the color image data stored in the image data storage means to an output resolution.
Colored image data converting means for converting the coloring data changed by the resolution changing means into yellow, magenta, cyan, and black halftone data, and outputting the halftone data converted by the colored image data converting means onto a film. A mesh original plate excluding the ruled line portion obtained from a film original production device for a plain net comprising an original plate output means for producing an original plate and a ruled line portion obtained directly from the negative or positive of the line image drawn on the original document. There is provided a method for producing a film original plate for a plain net, which is made by synthesizing a line plate forming a film with an original plate.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an example of the method of the present invention. In the figure, reference numeral 1 denotes an input scanner which serves as an image reading means of the present invention, and a line image drawn on a block original 260 can be read by scanning a scanning head. The read line element density of the input scanner 1 is preferably about 18 mm / line or more. An interface 2 transfers image data read by an input scanner via a data bus 3 to a magnetic disk device 4 serving as image data storage means of the present invention.

Reference numeral 5 denotes a host computer, which has a pixel scanning means 5a and a pixel color replacing means 5b, a colored image data registration means 5c, a colored image data conversion means 5d, a resolution changing means 5e, etc., which constitute the coloring means of the present invention. , Controls all parts as a whole.

Reference numeral 6 denotes a display which is an image display means of the present invention,
The image data stored in the magnetic disk device 4 can be read to display the line image of the block copy document 260. Reference numeral 7 denotes a coloring designating section which serves as a color designating means and a coloring area designating means of the present invention, and has a tablet 7a and a stylus pen 7b. A color memory 8 stores a plurality of colors to be colored in advance. The stored color is displayed on the display 6 as a color scale, and the color to be colored is designated by the tablet 7a and the stylus pen 7b. Then, the pixel scanning means 5a and the pixel color replacing means 5b are operated by the display 6 based on the designation from the coloring instruction section 7.
The colored image data other than the contour line displayed on the screen, that is, the ruled line portion of the block copy original is created, and the created colored image data is registered in the magnetic disk device 4 by the colored image data registration means 5c, and then the resolution changing means. 5e is changed to the output resolution, and the colored image data conversion means 5d changes the color to yellow,
Converted to magenta, cyan, and black halftone data.

Reference numeral 10 is an output scanner which is the original output means of the present invention,
The halftone dot data of yellow, magenta, cyan, and black converted by the coloring image data converting means 5d is the data bus 3
And an interface 11 are applied, the halftone original 12 of each color other than the ruled line portion is based on these data.
Create (Y ', M', C ', K').

13 is a line plate (Y ″, M ″, C ″, which forms the ruled line portion,
K ″), which is directly produced by stacking a negative or positive of the block original 260, these masks and a predetermined flat screen and printing it on the film original plate.
It is a final film original plate (Y, M, C, K) for plain net obtained by synthesizing and for each color by a printer. In the figure, the ruled line portion slab 13 is created for all four colors, but it goes without saying that the ruled line portion stencil 13 is created only for the necessary colors.

Reference numeral 20 denotes an auxiliary manuscript, which is not drawn on the block copy manuscript 260 but is drawn on the transparent film as an auxiliary line which is necessary for creating the colored image data. This auxiliary document 20 is used as needed. When it is used, the line image on the block copy document 260 and the auxiliary document 20 are used.
A color scanner or the like that can distinguish and read the above auxiliary lines is used as the input scanner 1, and a display 6 that can distinguish and display the line image and the auxiliary lines is used.

FIG. 2 shows the auxiliary document 20 shown in FIG.
As shown in the figure, the auxiliary document 20 has an auxiliary line 2 on the transparent film 21.
2, 23 and 24 are drawn in a color different from that of the block copy document 260, for example, red. The auxiliary lines 22 and 23 connect the discontinuous portions of the line drawings 261 and 262 drawn on the block copy document 260, and the auxiliary lines 24 are not drawn on the block copy document 260, but are added to the color instruction sheet 260. Is a drawing of the portion represented by the color boundary line 266. The auxiliary manuscript 20 is mainly used when the line image on the block copy manuscript 260 has many discontinuities, and is not necessarily used.

It should be noted that the line image and the auxiliary line image read by the scanner 1 are not limited to those drawn on the block copy document 260 and the auxiliary document 20 as described above, and may be a color different from the copied image when copying the block copy document or the like. You may use what draws the auxiliary line directly in.

Next, the operation of the film original production apparatus for a plain net shown in FIG.

First, the original document 260 on which the auxiliary document 20 is superposed is set at a predetermined position of the scanner 1, and the scanning head of the scanner 1 is scanned to display the line images drawn on the original document 260 and the auxiliary document 20. The image data is read separately, and the read image data is sent to the data bus 3 via the interface 2. The pixel density of the image data captured by the scanner 1 is 18
/ mm, which is considerably rougher than the pixel density of the original film, but this is to reduce the amount of image data. The image data sent to the data bus 3 is temporarily stored in the memory (not shown) of the host computer 5,
After being appropriately processed, it is sent again to the data bus 3 and stored in the magnetic disk 4.

FIG. 3 is a flow chart showing the processing of the image data captured by the scanner 1. First, when a start signal is given by operating the keyboard 9 or the like connected to the host computer 5, scanner input of image data is performed (S1), and the captured image data is binarized (S2). , Stored in the memory of the host computer 5. The binarization process may be performed after the image data captured by the scanner is stored in the memory of the host computer 5. The stored image data is read out every several lines, and dust removal processing and notch removal processing are performed (S3). The dust removal process is a process that automatically removes pixels of a few pixels or less as dust.
The notch removal process is a process for removing the irregularities of the contour line.
Next, the image data is compressed (S4). This data compression is a process of replacing one line of the binarized image data with address data at a point where white changes to black or black changes to white. , So-called run length data is created. The image data compressed in this way is sent to the data bus 3 by the host computer 5 and stored in the magnetic disk device 4 (S5).

Next, a description will be given of a process of performing coloring processing on the image data stored in the magnetic disk device 4 to create colored image data, and creating a halftone original plate excluding ruled line portions based on the colored image data. To do.

FIG. 4 is a flow chart for explaining the coloring process control operation by the host computer 5, and FIGS. 5 and 6 are explanatory diagrams showing the state of the image displayed on the display 6.

First, the keyboard 9 is operated to give a start signal to read the image data stored in the magnetic disk device 4 (S11) and display it on the display 6 (S12). On the display 6, as shown in FIG. 5, a line image is displayed in the image display area 60, and a color scale 61 is displayed in the menu area 61.
a, a border line creation menu 61b and a coloring menu 61c are displayed. The line image displayed in the image display area 60 is
Line image of block copy document 260 shown by solid lines and auxiliary document 2 shown by broken lines
The auxiliary line image is 0, and the line image and the auxiliary line image are displayed separately by changing the colors to be displayed. The color scale 61a displays the color data stored in the color memory 8. This color data is selected from colors that can be displayed on the display 6, and the color instruction sheet 265 shown in FIG.
The color selected is close to the color specified in. In addition,
Color data stored in the color memory 8 and the color instruction sheet 26
The color designated in 5 is associated with the color table (described later).

Then, it is determined whether or not to create a boundary line (S1
3). In this case, the area to be colored in the image displayed on the display 6 by the line image and the auxiliary line image.
a1, a2, b1, b2, b3, b4, b5, b6, c1, d1, d2, d3, d
Since the boundary lines have been created for all of 4, d5, e1, and e2, the next boundary line creating process (S14) is not performed, and the process proceeds to step S15 and waits for color designation. And
When the color designation is made, it waits until the coloring area is designated (S16), and when the coloring area is designated, the next coloring process is performed (S17). Here, the color designation in step S16 is
This is performed by operating the tablet 7a and the stylus pen 7b to select a color to be colored from the color scale 61a.
By operating the stylus pen 7b, the respective regions a1, a2, b1, b2, b of the image displayed on the display 6 to be colored.
This is done by designating any point in 3, b4, b5, b6, c1, d1, d2, d3, d4, d5, e1, e2. Further, in the coloring process of step S17, the pixel scanning means 5a sequentially scans the pixels around the pixel in the area designated in step S16 as a starting point, and with respect to the scanned pixels, The pixel color replacement means 5b replaces only the pixel of the same color as the pixel of the point designated in step S16 with the color selected from the color scale 61a in step S15.

Then, it is determined whether or not the coloring process is completed (S1
8) If not completed, the process returns to step S13, and the process from step S13 onward is performed on the next area.

In this manner, the respective areas a1, a2, b1, b2, b3, b4, b5, b6 of the image displayed on the display 6 in step S12,
c1, d1, d2, d3, d4, d5, e1 and e2 are colored with a designated color, and when this coloring process is completed, the colored image data registration means 5c magnetically colors the colored image data on the display 6. It is registered in the disk device 4 (S19). in this case,
Since the line image portion of the block copy document 260 indicated by the solid line, that is, the ruled line portion is not colored, the magnetic disk device 4
The coloring data registered in is the data of the area excluding this ruled line portion. Further, the auxiliary line image of the auxiliary manuscript 20, that is, the portion indicated by the broken line, may be colored with a desired color by a coloring process of the line image portion described later, if necessary, and only when coloring is performed by the colored image data registration means 5c. Coloring data is registered in the magnetic disk device 4.

If the auxiliary document 20 shown in FIG. 1 is not used, YES is selected in step S13 and boundary lines of colors corresponding to various auxiliary lines on the auxiliary document 20 are created (S14).

FIG. 6 is a schematic diagram for explaining a process when a color boundary line is created and a coloring process is performed.

Now, the image data of the block copy document stored in the magnetic disk device 4 is only a circular contour line as shown by the solid line in FIG. 6 (a), and the inside thereof is displayed on the display 6 in FIG.
In the case of coloring with a plurality of colors as shown in FIG.

First, similarly to the above, the image data stored in the magnetic disk device 4 is read (S11) and displayed on the display 6 (S12). In this case, on the display 6, as shown in FIG. 6A, only the outline 60k indicated by the solid line is displayed in the image display area 60, and the color to be colored is read from the color memory 8 on the color scale 61a. Has been displayed.

In the determination of whether to create the boundary line in step S13, YES is selected and the next boundary line is created (S14).
In creating the boundary line, the tablet 7a and the stylus pen 7b are operated to select the boundary line creation menu 61b, and the color of the boundary line is selected from the color scale 61a. ) Create a boundary line indicated by broken line 60L. As shown in the figure, the inside of the contour line 60K is divided into regions 60A to 60E by the creation of this boundary line.

Then, for each of the regions 60A to 60E, the color designation and the designation of the colored region are performed in the same manner as described above, and the coloring process is performed. At this time, in the coloring process of step S17, the pixel scanning means 5a sequentially scans the surrounding pixels from the pixel of the point in the area designated in step S16 as a starting point,
For this scanned pixel, the pixel color replacement means 5b replaces only the pixel of the same color as the pixel of the point designated in step S16 with the color selected from the color scale 61a in step S15, so that the area already exists. Even if the coloring process is completed from 30A to 30D and the region 30E is colored, the general border color is not protected and the color and the region to be colored are simply The area 30E is immediately colored only by instructing. Incidentally, the coloring treatment in this case is not limited to the above embodiment,
The designated color may be used together with a protection process of not coloring.

In this way, the areas 60A to 60E of the image displayed on the display 6 in step S12 are colored in the designated color as shown in FIG. 6 (b). Then, when this coloring process is completed, the colored image data registration means 5c is executed as described above.
However, the colored image data on the colored display 6 excluding the contour 60K, that is, the ruled line portion is registered in the magnetic disk device 4 (S19).

FIG. 7 is a flow chart for explaining a control operation for making a film original for each color based on the color image data registered in the magnetic disk device 4, and FIG. 8 is for converting the color image data during this control operation. FIG. 3 is an explanatory view of a color table used for the above, and the operation of making a film original plate for each color will be described below based on the drawing.

First, the keyboard 9 is operated to give a start signal, the colored image data stored in the magnetic disk device 4 is read (S31), and the double processing is performed (S32). The dubbing process is a process for sloping the boundary between colors, and in the case of the printed matter 250 shown in FIG. 9, the above areas a1, a2, b1, b2, b3, b
4, b5, b6, d1, d2, d3, d4, d5, e1, e2 may be slightly covered with the contour line.

Next, the resolution changing means 5e changes the resolution of the coloring data (S33). This change in resolution changes the image to the output resolution by interpolation or the like with respect to the colored image data. Here, since the colored image data does not include the ruled line portion, the smoothing process for removing the roughness of the contour line is not performed on the image whose resolution has been changed.

After this, data conversion processing is performed (S34). The data conversion process is performed by enlarging the regions a1, a2, b1, b2, b3, b4, b5, b6, c1, d1, d2, d of the enlarged image created in step S33.
Colored image data of 3, d4, d5, and e1 are shown in FIG.
The color table shown in (b) is used to convert halftone data of yellow, magenta, cyan, and black specified in the color specification sheet. In this color table, as shown in the drawing, a color number is given to each combination of halftone percentages of yellow (Y), magenta (M), cyan (C), and black (K), and FIG. Color table 28
Is the color table 29 of the image shown in FIG.
Shows a color table of the image shown in FIG. The color numbers of the color tables 28 and 29 are associated with the color data stored in the color memory 8 and registered in the host computer 5. Therefore, the step
The colored image data colored with the color of the color scale 61a shown in FIGS. 5 and 6 by the data conversion processing in S34 is displayed in the color tables 28 and 29 as yellow, magenta, cyan, and black halftone data, that is, color. Converted to decomposed data.

Next, the color separation data created by the data conversion in step S34 is sent to the data bus 3 shown in FIG. 1, and is output to the film original plate set on the scanner 10 through the interface 11 and the part other than the ruled line part is output. Net original plate 12 of each color
(Y ', M', C ', K') are created (S35).

Line plate 13 (Y ″, M ″, C ″, K ″) for ruled lines
Is directly produced by stacking a negative or a positive of the block original document 260, these masks and a predetermined screen, and printing them on the film original plate. In this embodiment, since the ruled line portion shown in FIG. 10 is a solid black color, the plate 13 is shown in FIG. 12 (b).
Only the black plate is prepared by stacking the negative 272 shown in FIG. 8 and the flat screen 291 shown in FIG. 14 and printing it on the film original plate.

After that, the net original plate 12 and the line original plate 13 are composited for each color by a printer and printed on one film original plate to prepare a final film original plate 14 (Y, M, C, K) for plain net. To be done.

(Effects of the Invention) As described above, in the present invention, after the line image drawn on the block copy document is read by the scanner or the like, and the coloring process is performed using the computer based on the read image data. , Change the image resolution and directly create a film original for each color.Make a halftone original of the part excluding the ruled line part from the device, and make a halftone original directly from the negative or positive of the original for the ruled line part. In order to synthesize the two types of halftone originals to form a film original for a plain net, in a device for directly making an original for each color using a computer, a ruled line portion generated by changing the resolution of image data after coloring is generated. It is not necessary to perform a smoothing process to remove roughness, a net original plate excluding ruled lines can be created in an extremely short time, and the device itself can be manufactured relatively inexpensively. As a result, there is an effect that a high-quality original film for a plain net film can be efficiently produced at low cost.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of the method of the present invention, FIG. 2 is an explanatory view of the auxiliary document 20 shown in FIG. 1, and FIG. 3 is a scanner 1.
FIG. 4 is a flowchart showing the processing of image data captured by the computer, FIG. 4 is a flowchart for explaining the coloring processing control operation by the host computer 5, and FIGS. 5 and 6 are the states of the images displayed on the display 6. FIG. 7 is a flow chart for explaining the control operation for making a film original for each color based on the coloring image data registered in the magnetic disk device 4, and FIG. 8 is a coloring image data for yellow and magenta. FIG. 9 is an explanatory view of a color table used for converting halftone data of cyan, cyan, and black, FIG. 9 is an explanatory view showing an example of a plain halftone portion of a printed matter, and FIG. 10 is a printed matter 250 shown in FIG. Fig. 11 is an explanatory view showing an example of a block used in the plate making process of Fig. 11, Fig. 11 is an explanatory view showing an example of a color instruction sheet used in the plate making process of the printed matter 250 shown in Fig. 9, Fig. 12 ( a , (B) the layout paper as shown in FIG. 10
FIGS. 13 (a), 13 (b), 13 (c), 13 (d) and 13 (e) are illustrations of positives and negatives obtained by photographing 260 with a camera, and the printed matter 250 shown in FIG. FIG. 14 is an explanatory diagram showing an example of a mask used in this case, and FIG. 14 is an explanatory diagram of a process for producing the printed matter 250 shown in FIG. 9 by a conventional plate making process. 1 ... Input scanner, 2 ... Interface 3 ... Data bus, 4 ... Magnetic disk device 5 ... Host computer 5a ... Pixel scanning means, 5b ... Pixel color replacement means 5c ... Colored image data registration means 5d …… Colored image data conversion means 5e …… Enlarged image creation means 6 …… Display, 7 …… Coloring instruction section 7a …… Tablet, 7b …… Stylus pen 8 …… Color memory, 9 …… Keyboard 10 …… Output Scanner, 11 ...... Interface 12 ...... Mesh original other than ruled line 13 ...... Ruled line part 14 …… Plain mesh film master 40 …… Auxiliary manuscript, 260 …… Master copy manuscript

Claims (1)

[Claims] 1. An image reading means for reading a line image drawn on an original, an image data storing means for storing the image read by the image image reading means, and a data stored in the image data storing means for reading. Image display means for displaying the line image, color designating means for designating a color to be colored, and colored area designating means for designating an arbitrary point in the area to be colored of the image displayed on the image display means. Coloring means for coloring the area designated by the coloring area designating means with a color designated by the color designating means, and colored image data for registering only the colored image data obtained by the coloring means in the image data storing means. A registration unit, a resolution changing unit that changes the colored image data stored in the image data storage unit to an output resolution, and a resolution changing unit that is created by the resolution changing unit. Yellow coloring data, magenta,
For a plain mesh composed of colored image data conversion means for converting into halftone data of cyan and black, and original plate output means for producing the original plate by outputting the above-mentioned halftone data converted by the colored image data conversion means onto a film. A master plate is prepared by synthesizing a halftone plate excluding the ruled line part obtained from the film master plate making device and a line plate forming a ruled line part obtained directly from the negative or positive of the line image drawn on the original. A method for making an original plate for a solid-colored film.