DE2120086A1 - Production of photographic dye extract images and their use as dye proofs - Google Patents

Description

AGFA-GE VAERI AG

Leverkusen % April 3, 1971

Production of photographic color separation images and their use

as color proofs.

Priority: Great Britain, June 2, 1970, note no. 26 611 /? O

This invention is concerned with the manufacture of photographic Color separation images that can be used as color proofs

This invention relates particularly, but not exclusively, to a method to produce multicolored photographic line and raster images by registering partial images on a permanent basis Forms the receiving surface serving as a carrier, and on photographic materials that are used for this purpose.

As used herein, the term "register" means that exactly cover two or more monochrome images in relative order, ζ · Β. on a receiver, in such a way that a perfect, well-coordinated multicolored or multicolored image is created. Registering can visibly completed, ζ · Β. through the use of registration marks on the individual transparent colored extracts or on such extracts and a permanent carrier or recipient, or when using pre-punched transparencies that are mounted on holding thorns during exposure and also during Transfer of the color sub-images to a receiving layer, if this Transfer takes place.

The production of multicolored raster images is in the work area the design, e.g. in the production of color models, colored wiring and circuits, cartography, color test prints and in the production of transparent material for slide and large projection of interest. There is a particular desire in the graphic industry

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after a simple and fast technical production of high quality color proofs with good reproducibility it is particularly desirable in the graphic arts industry to have four or more Make color proofs in order to use a color etcher for correction of a set of color copies before he uses them to make color plates and also to reproduce the color quality that should be achieved during the printing process

According to the present invention, a color separation image that is used for the Color proof is usable, made from a colored original on an element with a support that has a photosensitive layer with a color pigment or dye in a photosolubilizable one

^ Owns binder. The method is characterized in that one (A) the photosolubilizable layer is exposed to actinic light through a transparent color separation which is in the photosolubilizable Layer records the distribution of color to be represented by said pigment or dye; and by adding (B) dissolves the exposed parts of such layer and leaves a colored, positive image of the transparent color separation on the support. In order to produce a multicolor image, e.g. a colored raster image from a colored original, the preceding process steps repeated once or more times, in this or in each case a photosensitive element with a photosensitive layer a different color and a different transparent color separation are used,

fc which records the distribution of the associated color in the template. The required multicolor image is created by adding the different colored, positive images of the different, transparent color separations combined. The colored separations produced in this way can be placed on top of one another and brought into register to create a layered one on top of the other To obtain a color image of the original · In this case, the supports of the photosensitive elements should preferably be transparent. As an alternative, it should be said that in the case of suitably composed photosensitive elements, the colored elements formed therein Positive images, can be transferred from their supports to a receiving surface, the multicolor images are produced by the formed individual, colored, positive extract images in the

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Transfers register to such a surface. According to the preferred Embodiments of the present invention are these transmission methods applied. The light-sensitive layers of the various light-sensitive elements and the surface of the receptor material are preferably designed so that after each colored, positive separation image has been transferred to such a surface, the photosolubilizable one Binder can be removed by a solvent while leaving a positive pigment or color image on the surface of the receiving material is left behind.

The present invention thus comprises according to the preceding statements a method for making a photographic multicolor Image of an original, in which a color separation image on a 1 ', Element is produced by a process which includes step e Contains (A) and (B) as defined above by making a photosensitive An element is used in which the photosensitive layer is carried by a temporary support, followed by the "following others Steps to be carried out:

(C) The positive image is transferred by adhesion to a receiving surface in the presence of a solvent or swelling agent for the photorolubilizable binder; (D) The permanent ■ äger is mi ·, washed a solvent of such a binder, Ιε.ε the distance causes such a material while the positive pigment or color image on the rf Er.pfangsobe laugh remains; (E) A different, colored, positive cutout image, or each of two or more different, colored, positive

iven extract images borrowed from the original on different sensitive Elements formed by performing steps corresponding to (A) and (B) are equally applied to the receiving surface in the register with the positive image or positive image already present transfer; this or any further transfer is followed by washing the permanent backing layer with a solvent that has the fotosolubiliäbaren binder that is in the transfer stage to the permanent carrier has been transferred. Advantageously, will the receiving surface prewetted with a solvent or swelling agent for the photos-lubricatable binder before a positive one Image transfers to it.

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By modifying this process, it is possible to use a light-sensitive Element to use that instead of a pigment or dye a Contains color-forming compound which can be converted into a colored compound with a suitable reactant, kan-i; this happens for example after the exposed parts ler photosensitive Layer has dissolved away or even after the transfer of the positive (latent) image on a recipient.

According to a preferred embodiment of the present invention, the photosolubilizable binder is formed from a mixture of an alkali-soluble polymer and a naphthoquinonediazide or a bisphenol which has been modified to a bis (o-quinonediazide), as described in British patents 1,116 (rfK or 1 116 737 are described.

Useful alkali-soluble polymers are the copolymers of unsaturated carboxylic acid, such as acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, itaconic acid and citraconic acid. If the copolymer contains an unsaturated dicarboxylic acid, its half-esters and half-amides can also be used. These unsaturated carboxylic acids are copolymerized with ethylenically unsaturated compounds which are particularly insoluble in an alkaline medium and which are present in the copolymer in such a ratio that the copolymer itself remains soluble in an alkaline medium. Ethylenically unsaturated compounds that can be copolymerized include styrene and its derivatives, vinyl chloride, vinylidene chloride, vinyl esters Ψ such as vinyl acetate, acrylic acid esters, methacrylic acid esters, acrylonitrile., Methacrylonitrile, etc.

However, preferred alkali-soluble polymers are the so-called "novolaks" British Standard 1755-1951 these are "soluble, fusible, synthetic resins made from a phenol and an aldehyde. do not have any reactive groups (e.g. methylol groups) in the molecule and are therefore unable to condense with other novolak molecules when heated without the addition of hardening agents. "

Useful naphthoquinonediazides are naphthoquinone-1,2-diazide (2) -4-sulfofluoride and naphthoquinone-1,2-diazide (2) -5-sulfofluoride. In the British

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Patent specification 1,116,737 lists bis (o-quinonediazides) which are derive from the modification of bisphenols. The most interesting of these BisCo-quinonediazides) are bis (6-diazo-2, ^ -cyclohexadien- ^ t-yl-1-one) phenylmethane, 2,2-bis (2-methyl-6-diazo-2, * t-cyclohexadien-4-yl-1-one) propane, Bis (2-bromo-6-diazo-2, ^ f-cyclohexadiene - ^ - yl-i-onJ-sulfone and 1,1-bis (2-methyl-6-diazo-2, ^ f-cyclohexadien-4-yl-i-one) -cyclohexane.

The amount of alkali-soluble resin that is added to the photosensitive quinonediazides can vary within wide limits. Preferably, however, at least k parts by weight of alkali-soluble resin are present for each part by weight of the photosensitive compound or compounds containing quinonediazide groups.

In a further preferred embodiment, the photosolubilizable Binder formed by a mixture of an alkali-soluble polymer and a compound that contains a diazosulfone group like it in the Belgian patent 7 ^ 0 597 is described.

The alkali-soluble polymers used are the same as them Be described above · A large group of compounds that make up a Diazosulfongruppe is contained in the Belgian patent 740 .597 indicated The most interesting are (p-acetamidophenylsulfonyl) - (p-diethylaminophenyl) -diimide, (p-tolylsulfonyl) - (p-anilinophenyl) -diimide, (p-Tolylsulfonyl) - (p-dimethylaminophenyl) -diimide, (p-Tolylsulfonyl) - (p-diethylaminophenyl) -diimide and (p-Tolylsulfonyl) - ^ - diethylamino-2-methylphenyl) diimide.

As in the case of naphthoquinonediazides and bis (o-quinondiaziie), the The amount of the alkali-soluble resin to be added to the photosensitive compound having a diazosulfone group is within wide limits vary. Preferably, however, at least 4 parts by weight are alkali-soluble Resin present for each part by weight of diazosulfone.

In another preferred form according to the invention, the photosolubilizable Binder formed by a mixture of an alkali-soluble resin such as a novolak and a compound having a diazomethane group contains according to the following formula:

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E.-SO ₀ -C-CO-R ₀
12 ,, 2

^N 2

in which R. and R ₀ (identical or different) denote substituted or unsubstituted aliphatic, aromatic or heterocyclic groups. These compounds have been described in the laid-open Dutch patent application 68/126 ^ 5 · The compounds which contain a diazoraethane group in which R _{0 represents} a dialkyl aminophenyl group are very interesting, ζ · Β. (p-Tolylsulfonyl) - (p-dimethylaminobenzoyl) -diazomethane

A photo-soluble element is made by making solutions of photosolubilizable ones Mixtures of an alkali-soluble polymer and more photosensitive Applying compounds as layers on temporary supports. The photosensitive coating composition can also stabilizers, Contain plasticizers, thinners, dyes and also small amounts of additives that increase the photosensitivity of the mixtures.

The photosensitive Giesszusaramensetaung is applied to the temporary support by spraying, brushing, rolling, with doctor blade, air brush, or by wiping techniques to it, leaving a layer after evaporation of the solvent or solvent mixture containing a starch van O ₅ J? to 20 µ, preferably 1 to 5 U · The photosensitive layer is then ready for exposure to actinic light rays. Usable light sources are carbon arc lamps, xenon lamps, "mercury vapor lamps, fluorescent lamps, argon incandescent lamps, photographic headlights and tungsten lamps.

In the case of samples for graphic work, each one is sensitive to light Layer contain a color additive, i.e. a pigment or a dye, which should be of such a nature that in the case of transfer of the layer on the permanent support, the color value of the layer comes close to that color value that is to be produced by the printing ink used

For reproduction ζ · Β. a three-color template will be any of the three dye-containing photosolubilable elements by a photographic Color separation transparencies exposed ο The exposed parts of the fotosolubili-

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sizable layer are likely to be soluble in an alkaline medium by photolytic conversion of the photosensitive compounds, see above that the development or the removal of the layer exposed on o.en Set by means of an aqueous mixture, preferably by means of an alkaline aqueous solution, can be achieved, which the imagewise quickly dissolves the degradation products obtained. A suitable alkaline developer is an aqueous solution of an alkali metal phosphate, e.g. Sodium phosphate, or an aqueous sodium hydroxide solution, or a mixture of both.

The result of this development is a positive, pigmented image of the original color separation slide on the temporary support. ·

Before use, the receiving surface is treated with a solvent or Wets swelling agent for the photosolubilizable binder. Direct then the temporary support and the receiving surface with the pigmented image between the two are pressed together, z «B. with the help of two roles. As a result of the solvent or swelling agent treatment the pigmented image layer softens the latter on its surface and adheres itself to the receiving surface; if if the temporary support is withdrawn, the pigmented image remains, which is formed by the pigmented, photosolubilizable binder, adhere to the surface of the permanent support.

In the following step of the process, the permanent carrier, the a pigmented image bears that of still photosensitive, photosolubilizable Binder is formed, washed with a solvent for the photosolubilizable binder; the latter becomes thereby washed away surprisingly leaving an exact pigment print of the pigmented image on the surface of the permanent support will.

A second color separation slide is used, with which a further photosolubilizable layer is exposed on a temporary support, which contains a pigment or a dye. Here, too, the exposed parts of the layer are dissolved away in an aqueous alkaline medium, so that a pigmented, positive image of the second color separation

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negative remains on the temporary carrier «As in the case of the first pigmented image becomes the surface of the permanent tag that this first pigmented image already bears, with a solvent or Swelling agent for the photosolubilizable binder wetted, and immediately then the second preliminary support with the pigmented image in between is pressed against it. You have to be very careful work to ensure that the second pigmented image on the surface of the permanent support is in register with the · already existing first pigmented image is attached. After that, the second provisional carrier will be withdrawn "

Then the further steps of the procedure are carried out in order to obtain the still to dissolve photosensitive, photosolubilizable binders, so that a new pigmented image is in register with the first one. will let.

Additional pigment images of other color separation slides can be added printed the same way on the surface of the permanent support

Various dyes, pigments and color couplers can be incorporated into the photosolubilizable binder. The dyes used must be resistant to diffusion and as chemically inert to processing and washing liquids as possible. If they are used in the production of colored test prints, their absorption spectrum must correspond as closely as possible to that of the standard printing inks · L · Details about standard printing inks can be found in HM Cartwright-Ilford Graphic Arts Manual (1962) - Vol. I, pages

There are "cold" and "warm" standard colors. in the USA through the GATF color cards and in the German standards DIN 16508 and 16509. Warm colors are e.g. by the German standard DIN 16538 established.

The cold standard colors are quite pure due to the use of purple pigments marked, mostly insolubilized rhodamine and phloxin dyes, which are characterized by a very low side absorption in the blue Distinguish area of the spectrum.

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The standard warm colors are made insoluble by using them Azo dyes marked. These dyes are against solvents, e.g. alcohol, more stable than the rhodamines and phloxins, but have a much stronger side absorption in the blue region of the spectrum on.

Tests have shown that pigments are insoluble or just very are poorly soluble in water or organic liquids of the alcohol and polyalcohol type, e.g. glycerine, which have the required diffusion resistance. Pigment dyes applied from an aqueous dispersion are preferably used, although the use of direct dyes chemically linked to a colloid or Polymer are bound, can not be ruled out.

For the preparation of colored test prints the photo-solubilizable one contains Binder pigments in such a high concentration that the optical density in the wavelength range corresponding to maximum absorption is at least Is 0.35.

Apart from the use of dyes for making colored ones Test prints whose absorption spectrum must meet certain requirements, all colors are taken into account, e.g. blue-green, light blue-green, Purple, warm purple, black, yellow, green, brown, orange, sot, light blue as well as metal colors such as pale gold, deep gold, copper and silver. With In other words: in the context of this invention, the term "color" is so to understand that it includes all pure and mixed colors, as well as black and white.

The right shade can be very easily found by an average professional be selected by making a series of experiments. as black pigment is commonly used soot.

'The adhesiveness of the photosolubilizable layer on the preliminary Carrier, which is preferably a flexible one, must be oriented in such a way that it can be easily removed from the temporary carrier, after compressing the temporary support and the permanent support with the positive image in between. A relative

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hydrophobic temporary carrier, e.g., an unsubbed cellulose triacetate Sheet, a polystyrene sheet or a sheet made from the copolymer made of vinyl acetate and vinyl chloride and a permanent carrier or receiver that has a hydrophilic surface, e.g. a subotrated one Polyethylene terephthalate carriers, can be used for 3.B. a hydrophobic carrier, subbed, as described in Belgian patent specification 721 ^ 69 · According to a preferred embodiment the photosolubilizable layer is so composed that its adhesion to the provisional support is weaker in the wet state than in the dry state. This can be done by adding hygroscopic Agents, e.g. a water-soluble organic hygroscopic compound, e.g. glycerol, and wetting agents and plasticizers.

The permanent support can be rigid or flexible and should be inherent from good adhesion both in the wet and in the dry state with the transferred photosolubilizable layer or with the aid of one on top secure arranged adhesive layer.

Depending on the use of the multicolor copy, the support is permanent transparent or opaque. So it is possible to use metal layers or foils, glass, ceramic or resin substrates, and for the processing and washing liquids to use impermeable paper.

Resin carriers, which have a high mechanical strength, a very low ψ water absorption and consequently a high dimensional stability in the dry and wet state, can be made of a linear polyester, eg polyethylene terephthalate. Good results in terms of dimensional stability are achieved with aluminum foils that are sandwiched between two sheets of paper with high wet strength; however, this material is quite expensive.

Permanent resin supports can be made opaque by covering them with a matted adhesive layer, or by matting or coloring them in the mass. The matting can be done with known pigments. e.g. Titanium dioxide, zinc oxide and barium sulfate.

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Hydrophobic resin supports with one or more adhesive layers are used as permanent supports according to the invention. Preferred adhesive layers which are used for a hydrophobic resin support as a permanent support, for example for a polyethylene terephthalate support, are described in Belgian patent specification? 21,469. Therein a sheet material is claimed which comprises in sequence; a hydrophobic film support, a layer (A) adhered directly to this hydrophobic film support and containing a copolymer, which to k5 to 99.5 wt -.% of at least one of the chlorine-containing monomers vinylidene chloride and vinyl chloride to 0.5 to 10 wt. - # is made from an ethylenically unsaturated, hydrophilic monomer and from 0 to h5.5 wt .- # from at least one other, copolymerizable, ethylenically unsaturated monomer, and a layer (B) which is a mixture - in a weight ratio between 1: 5 and 1: 0.5 - comprises of gelatin and a copolymer consisting of 30 to 70 wt -% of butadiene has been obtained and at least one copolymerizable, ethylenically unsaturated monomers..

The various color separation transparencies used are made according to known Process made. The multicolor original is photographed twice or more times through different color filters to create a separate Make slides for each filter. With each slide, only those colors are copied which its filter allows to pass through. Even though the abstract slides are usually printed (copied) in the colors yellow, blue-green, purple, and black, others can also be used, like pink, gray or dark blue inks.

When the exposed parts of the imagewise exposed photosolubilizable When the layer on the preliminary support is washed away, the pigment or dye on the washed away parts also disappears. However, the pigment or dye is not intended to be removed from the transferred mixture when the surface of the permanent support washed is used in carrying out the method according to the invention a temporary support whose surface is relatively hydro-. is phobic, while the permanent carrier used has a surface which is relatively hydrophilic or is hydrophilized by the presence of one or more appropriately subbed layers.

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Furthermore, the surface of the permanent support is made prior to the transfer with a solvent or swelling agent for the photosolubilizable layer wetted so that the dye can penetrate into the pores of the surface of the permanent support and remain there after the photosensitive Layer has been washed away. A permanent pigment image has then formed.

example 1

Formation of color images with naphthoquinone-1,2-diazide (2) -5-sulfofluoride

A. Composition of the photosolubilizable layers :

(1) blue-green sheet :

In a mixture of 17.5 ml of ethylene glycol monomethyl ether and 17.5 ml of acetone, 1.4 g of naphthoquinone-1,2-diazide (2) -5-sulfofluoride and 5.6 g of ALVONOL 429 K (registered trademark for a novolak from Chemischen Works Albert) dissolved. The naphthoquinonediazide is prepared as described in Example 1 of British Patent Specification 1 116 67 + ^1.

The resulting solution is then mixed with:

Heliogenblau B Colanyl Dough (CI. 74,16O) (a blue-green pigment dispersion, traded from Badische Anilin- & Soda-Fabrik AG, Ludwigshafen a / Eh) 1.2 g

Ethylene glycol monomethyl ether 10 ml

Methyl glycol acetate 15 ml

The mixture obtained is then for 10 minutes at 30 ° C by means of a high-speed stirrer (20,000 rpm). The emulsion obtained is filtered through a nylon cloth and applied to a temporary support of biaxially stretched polyethylene terephthalate, which has a thickness of approximately 0.1 mm, is applied. The layer is in the ratio of 20 to 30 g of emulsion per m2 applied. The photosensitive layer is dried in a drying oven at 50-60 ° C

(2) yellow layer :

This layer is produced in the same way as (1). However, the cyan paste is replaced with 1.5 g of yellow pigment 16. ( CI.ZO.QkO) (Permanent Yellow NCG Colanyl Dough - registered trademark of Farbwerke Hoechst AG, Frankfurt (M)).

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(3) purple layer :

In the casting composition of (1), the cyan paste is increased by 1.8 g Replaced permanent carmine FBB Colanyl batter (CI. 11,000). (Registered trademark of Farbwerke Hoechst AG, Frankfurt (M)).

( ² O black layer :

In the casting composition of (1), the cyan paste is replaced by 2 g of the black paste: carbon black dispersion P 130 (registered trademark of the Deutsche Gold- und Silber-Scheideanstalt, Frankfurt (M)).

B. Composition of the permanent support

A biaxially stretched 180 μm thick polyethylene terephthalate film is coated on both sides with the following mixture at 25-30 ° C. in a ratio of 1.6 g / m ^2;

Copolymer of vinylidene chloride, N-tert-butyl acrylamide, n-butyl acrylate and N-vinylpyrrolidone (weight ratio 70: 23: 3: ^) 5.5 g

Methylene chloride 65 ml

1,2-dichloroethane 35 ml

The layer obtained is coated with a mixture, the following-

mass is produced:

1350 g of titanium dioxide (average particle size 0.11 u) are in 5 liters of water dispersed containing 25 ml DEQUEST 2006 (registered Trademark of Monsanto Chemical Company, St. Louis, Mo. USA for a Dispersant that corresponds to the following structural formula:

0
t

HO-P-ONa

0 CH_ 0

t T ² t

Na0-P-CH_-N-CH _o -P-0Na, 2 2 ι

ONa ONa

The dispersion is stirred rapidly for 10 minutes at a temperature of 5 to 15 ⁰ C and then warmed to 35 ° C, at which temperature ^ 00 ml of a 10 wt .- # gelatin aqueous solution are added, while the rapid stirring is continued · The following mixture is then added while stirring slowly to avoid foaming:

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10 wt .- ^ ige aqueous gelatin solution 18OO ml Water 130 ml

20 wt -.% Latex of the copolymer of butadiene and methyl methacrylate (50:50 weight ratio) 25OO ml

10 wt -.% Of an aqueous solution of the sodium salt of Oleylmethyltaurids 37.5 ml

Ethylene chlorohydrin 500 ml

The coating is carried out in such a ratio that after a 5 µ thick layer is obtained after drying.

C. Exposure of the photosolubilizable layers

The cyan and purple photosensitive layers are 5 minutes P by their corresponding color separation slide in a vacuum frame from a distance of 15 cm using an 80 watt high pressure mercury vapor lamp exposed. The yellow and black layers are exposed in the same way, but for 10 minutes.

D. Development of the exposed layers

The exposed layers can be developed in different ways:

(1) The developer is a 10 # aqueous sodium phosphate solution

The exposed layers are immersed in the developer bath for 2 minutes, after which the exposed parts are washed away by gently rubbing them with a sponge or cotton ball. The slide image obtained is then removed from the bath, carefully rinsed in water and dried in ψ a stream of hot air *

(2) The developer is a 0.5 # aqueous sodium hydroxide solution. the exposed layers are immersed in this developer bath for 1 minute, after which the exposed parts are cleaned with a sponge or a cotton ball washed away as described in section (1). Then will the image obtained, also as described under (1), rinsed and dried. This gives four color separation transparencies.

E. Creation of a pigment image by transferring it to the permanent carrier

The permanent backing is left in a mixture of 30 seconds to 1 minute

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Ethanol and water (80:20 parts by volume) or immersed in a methanol bath. With the help of a pair of rubber rollers, the temporary support bearing the cyan pigmented image is pressed against the surface of the permanent carrier with the blue-green pigmented image in between. After a contact time of 30 seconds, the temporary carrier peeled off · A positive impression of the blue-green pigmented partial slide remains on the permanent carrier.

The permanent carrier will then turn in for 30 seconds to 1 minute a mixture of ethanol and water (80:20 parts by volume) or immersed in a methanol bath. The unexposed quinonediazide and novolak are pulled out so that only a cyan pigment image remains on the surface of the permanent support. The surface of the permanent The carrier is dried with a stream of hot air.

The same procedure is used with the yellow, purple, and black Repeated excerpt slides, each time being transferred to the register on the same permanent support · Finally, one receives a multicolored image on the permanent support · This image is a exact copy of the original from which the various color separations were made.

The various pigmented images on the temporary supports can also easily get into the register by overlaying. In this way a sharp reproduction of the original is also obtained

Example 2

Formation of color images with compounds containing a diazosulfone group

A. composition of fotosolubilisierbaren layers: (1) cyan layer

0.7 g of (p-tolylsulfonyl) (p-ethylaminophenyl) diimide and 6.3 g of ALNOVOL kZS K (registered trademark) are dissolved in a mixture of 17.5 ml of ethylene glycol monomethyl ether and 17.5 ml of acetone then mixed with:

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Pigment dispersion "Luconyl blue LBGO"

(registered trademark of the Badische

Aniline & Soda Factory, Ludwigshafen a / Eh,

Germany) 1.2 g

Ethylene glycol monomethyl ether 10 ml

Methyl glycol acetate 15 ml

The mixture obtained is treated in the same manner as in Example 1 A (1) described and also applied to a biaxially oriented polyethylene terephthalate film base

(2) yellow layer :

This layer is made in the same way as the cyan layer. The cyan paste, however, becomes imperon yellow with 1.5g pigment dispersion K-GG (highly concentrated) (registered trademark) replaced.

(3) purple layer :

This layer is made in the same way as in section (1), but with the difference that the cyan paste is made up of 1.8g pigment dispersion Permanent carmine FBB Colanyl batter (CI. 11,000) (registered trademark) is replaced.

(^) Black layer :

This layer is formed in the same manner as in section (1) with the difference that the blue-green paste is replaced by 2.5 g of carbon black dispersion P 130 from the Deutsche Gold- und Silberscheideanstalt

B. Exposure of the Photosolubilizable Layers The exposure is carried out in the same way as is described in Example 1C.

C Development of the exposed layers :

The exposed layers are dissolved in a 0.7 # aqueous sodium hydroxide solution submerged. After one minute, the exposed parts are washed away by gently rubbing with a sponge or cotton ball. The slides obtained are removed from the bath, rinsed with water and dried in a stream of hot air.

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D. Formation of a pigment image by transferring it to a permanent carrier

The same carrier film is used here as in Example 1 B. The procedure of Example 1E is repeated. An exact reproduction of the colored original is achieved.

Example 3

Formation of color images with compounds that have a diazomethane group contain

A. Composition of the photosensitive layers

(1) blue-green sheet :

6.3 g novolak and 0.7 g (p-tolylsulfonyl) - (p-dimethylarainobenzoyl) diazomethane are in a mixture of 17 »5 ml of ethylene glycol monomethyl ether and 17.5 ml of acetone dissolved. A mixture of 1.2 g of Luconyl blue LBGO blue-green paste (registered trademark) is added to the solution obtained. added in 10 ml of ethylene glycol monomethyl ether and 15 ml of methyl glycol acetate.

The mixture is stirred for 10 minutes by a high-speed stirrer (20,000 rpm). touched. Then the light-sensitive emulsion is filtered through a nylon cloth and in a ratio of 20-30 g emulsion per m2 on one applied biaxially stretched polyethylene terephthalate film base. The photosensitive film was dried at 50-60 ° C.

(2) yellow layer ;

The process according to (1) is repeated with the difference that the Blue-green paste is replaced by 1.5 g Imperongelb K-GG (highly concentrated) (registered trademark)

(3) purple layer :

The procedure according to (1) is repeated, but with the difference that the blue-green paste with 1.8 g permanent carmine FBB Colanyl paste (CI. 11,000) (registered trademark) is replaced

(**) Black layer :

The procedure according to (1) is repeated, but with the difference that the blue-green paste with 2.5 g rue dispersion P 130 (registered »Trademark) is replaced.

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B. Exposure of the photosensitive layers

In the same way as described in Example 1C.

C. Development of the exposed layer

In the same way as described in Example 1D.

D. Formation of the colored image by transfer onto the surface of the permanent support

The same procedure as described in Example 1E.

The end result is a sharp color image of the original.

Example 4

Formation of color images with a bisphenol that is modified to a bis (oe hinondiazid) .

In Example 2A (1), (p-tolylsulfonyl) - (p-diethylaminophenyl) diimide is used replaced by 0.7 g of bis (2-bromo-6-diazo-2,4-cyclohexadien-4-yl-1-one) sulfone. The further treatments are carried out as described in Example 2. For the development of the exposed layer, a Developer bath used containing 50 g of Iacrium phosphate and 0.5 g of sodium hydroxide per liter of water contains »

A sharp reproduction of the colored original is achieved.

αν.469 109850/1576

Claims (1)

Claims ■ Ί ^ / Process for the production of a colored photographic raster image by actinic exposure of an element that has a preliminary Contains carrier bearing a photosensitive layer made of a color pigment contained in a photosolubilizable binder is dispersed, the method being characterized by the following steps: (A) exposure of the photosolubilizable layer to actinic light through a transparent color separation image, (B) Dissolution of the exposed parts of the layer in an alkaline medium, leaving a pigmented positive image of the original transparent color separation image on the temporary support » (C) Transfer of this positive bid onto the surface of a permanent one Support by pressing the surface of the permanent support and the temporary support with the image in between, after the surface of the permanent support with a solvent or swelling agent for the photosolubilizable binder has pre-wetted, and separation of the temporary support from the surface of the permanent support, leaving the pigmented Image formed by the pigmented photosolubilizable binder is adhered to the surface of the substrate remain, (D) washing the surface of the permanent support and the pigmented one Image with a solvent for the photosolubilizable binder, to dissolve this binder, creating a positive Pigment image remains on the surface of the permanent support, the above-mentioned in the case of a multicolor photographic image Process steps with other transparent color separation images and other pigmented photosolubilizable layers are repeated on temporary supports and at each stage (C) the new positive image on the surface of the permanent support is transferred in the register with the pigaent image already present 109850/1576 2. Process according to which a color separation image is necessary for the production colored proofs can be used., is produced from a colored original on an element that contains a carrier, bearing a photosensitive layer containing a color pigment or dye in a photosolubilizable binder contains, characterized in that (A) the photosolubilizable layer with actinic light through a transparent color separation image that is through the pigment or the color distribution to be represented is recorded in the original, and (B) are dissolved by the exposed parts of this layer, creating a colored positive image of this transparent color separation image is left on the carrier 3 · Process for the production of a multicolor image from a colored one Template, characterized in that a method according to claim is carried out and steps (A) and (B) are carried out one or more times, in this or in each case a photosensitive Element having a photosensitive layer of a different color and a different transparent color separation image used, which records the distribution of the associated color in the original, and in which the required multicolor image by Combination of the different colored positive images of the different transparent color separation images is produced. k. Method according to claim 3, characterized in that the different, colored, positive images on their carriers are combined with one another in register. 5. The method according to claim 3, characterized in that the different, colored ^ positive images by transferring them in the register can be combined onto the surface of a permanent carrier. 109850/1576 2120036 6. The method according to claim 5 _5, characterized in that after the transfer of each colored positive separation image to the surface of the permanent carrier, the photosolubilizable binder, which is transferred to this surface in this transfer step, is removed by a solvent, the positive pigment or a colored image is left on the surface of the permanent support. 7 · The method according to claim 6, characterized in that a method as practiced in claim 2 using a photosensitive element in which the photosensitive layer carried on a preliminary support, after which the following further steps are carried out, (C) the positive image becomes by adhering to the surface of a permanent support in the presence of a solvent or swelling agent for the photosolubilizable Transferring binder, (D) the permanent support is washed with a solvent that will remove such binder causes, while the positive pigment or color image is left on the surface of the permanent support, (E) a different, positive color separation image or any of two or more different positive color separation images obtained from the Original on various photosensitive elements have been formed by performing process steps that (A) and (B) correspond, is applied equally to the surface of the permanent support in register with the positive image or the Positive images that are already present there, transferred, this or each further transfer a washing of the permanent support with a solvent follows to photosolubilizable binder, which in this transfer stage is transferred to the permanent support has been to remove. 8. The method according to any one of the preceding claims, characterized in that that uses a mixture of an alkali-soluble polymer and a naphthoquinonediazide as a photosolubilizable binder will. ^ανΛ69 109850 / 1S76 2120036 9 · Method according to claim 8, characterized in that the alkali-soluble Polymers is a novolak and the naphthoquinonediazide is naphthoquinone-1,2-diazide (2) -4-sulfofluoride or naphthoquinone-1,2-diazide (2) -5-sulfofluoride is. 10. The method according to any one of claims 1 to 7, characterized in that a mixture of an alkali-soluble polymer and a bis (oquinonediazide) which is derived from a modified bisphenol is used as the photosolubilizable material. 11. The method according to claim 10, characterized in that the alkali-soluble polymer is a novolak and the bis (o-quinonediazide), which is derived from a modified bisphenol, bis (2-bromo-6-diazo-2, ⁱ f-cyclohexadiene - ^{z is} f-yl-1-one) sulfone. 12. The method according to any one of claims 1 to 7, characterized in that that a mixture of an alkali-soluble polymer and a compound containing a diazosulfone group as a photosolubilizable one Material is used. 13. The method according to claim 12, characterized in that the alkali-soluble polymers is a novolak and the compound containing a diazosulfone group is (p-tolylsulfonyl) -p-diethylaminophenyl) -diimide is. 1 ^ f. Method according to any one of claims 1 to 7, characterized in that that a mixture of an alkali-soluble polymer and a compound containing a diazomethane group as the photosolubilizable one Material is used. 15. Process according to claim Ik, characterized in that the alkali-soluble polymer is a novolak and the compound which contains a diazomethane group is (^ -Tolylsulfonyl5- (4-dimethylaminobenzoyl) -diazomethane. 16. The method according to any one of the preceding claims, characterized in that that the most exposed parts of the or each photosolubilizable layer with an aqueous sodium phosphate solution or sodium hydroxide solution to be washed away » -: 1QS85Q / 157S 17 · The method according to claim 16, characterized in that the Transfer made to the surface of the permanent support is made with methanol or a mixture of ethanol and water has been wetted. 18. The method according to any one of claims 1 to 17, characterized in that that the photosolubilizable binder from the surface of the permanent support with a mixture of ethanol and Water is washed away. 19 Photographic multicolored raster images, characterized that they have been obtained by a method according to any one of claims 1 to 18. ^{GV 469} 109850/1576 ORIGINAL INSPECTED