JPH02309361A - Transferred color image forming method - Google Patents

Abstract

PURPOSE:To form an image having finish quality comparable to that of printed matter even when used for proofreading by exposing and developing a color image forming material, sticking a toner to the unexposed part and transferring the resulting color image. CONSTITUTION:A color image forming material obtd. by forming a positive type photosensitive layer (A) on a substrate is imagewise exposed and developed, a color toner is stuck to the sticky surface of the unexposed part and the resulting color image is transferred to a transfer material such as paper for printing to form a transferred color image. The layer A may be made of a compsn. contg. a photosensitive compd. such as t-butylphenol-naphthoquinone-1, 2-diazidosulfonic ester and a binder such as a copolymer represented by the formula (where l-n expresses the ratio among units). A releasing layer may be interposed between the substrate and the layer A or the layer A may be coated with an overcoat layer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to photosensitive imaging materials. The present invention can be used, for example, as a color proof for color proofing in color printing, and in this case, in particular,
It is possible to transfer only a color image to a transfer material such as printing paper, and thereby it is possible to provide a color proof that provides a transferred image that is similar to a printed matter.

[Conventional technology]

Conventional techniques of this kind, for example, the conventional color transfer image forming method for obtaining transfer-type color proofs, have insufficient proximity of the resulting transfer image to the printed matter, resulting in a visual sensation and impression different from that of the printed matter. There is a problem that it is not suitable for calibration. That is, as a conventional technique, Japanese Patent Application Laid-Open No. 47-4
No. 1830, JP-A-59-97140, Special Publication No. 198-
Various types of colored image forming methods are disclosed in Japanese Patent Publication No. 501217 and Japanese Patent Publication No. 48-31323, but the transferred images obtained by these methods are all formed on a transfer material (for example, printing paper). The non-image area of the colored image is covered with a polymer film, and the finish quality is different from the actual print (the printed paper surface is exposed in the non-image area), making it problematic to use as a sample of the print. .

[Promise of invention]

The present invention solves the above-mentioned problems of the prior art, makes it possible to obtain a transferred image that is not covered with a polymer film, etc. Therefore, even when used as a color proof for proofing, it is possible to obtain an image that is extremely similar to the actual printed matter. An object of the present invention is to provide a method for forming a colored transfer image.

[Means for solving problems]

The object of the present invention is to (a) imagewise expose a colored image forming material having a positive photosensitive layer on a support, (b) elute the exposed areas with an alkaline eluent, and (c) unexpose areas. This is achieved by a colored transfer image forming method characterized by developing with colored toner and (d) transferring the obtained colored image to a transfer material.

According to the above configuration of the present invention, only a colored image can be transferred to a transfer material without coating with a polymer or the like. Therefore, even when used as an image forming means for proofing printed matter, it is possible to obtain the same finished quality as that of printed matter. Therefore, it is extremely effective when used as a means for forming a color proof for proofreading.

The colored image forming material used in the present invention has a positive photosensitive layer on a support, and this photosensitive layer can be a positive photosensitive resin film layer.

When the present invention is adopted, the transfer temperature during transfer image formation can also be reduced.
The temperature can be relatively low. That is, by using a positive photosensitive resin layer having adhesive properties as the photosensitive layer, it is possible to adhere colored toners well, and therefore the transfer temperature does not necessarily have to be high.

The present invention will be explained in further detail below.

First, a colored image forming material (hereinafter also referred to as "image forming material according to the present invention") to which the colored transfer image forming method of the present invention is applied will be described.

The image forming material according to the present invention has a positive photosensitive layer on a support.

The positive photosensitive layer included in the image forming material according to the present invention can be composed of a photosensitive composition containing a positive photosensitive compound and a suitable binder. This positive photosensitive layer can be a positive photosensitive resin layer containing a positive photosensitive compound and a resin. In this case, the resin (which functions as a binder) can be used at room temperature (the normal atmospheric temperature when forming a transferred image) to 50°C.
Those having a softening point of 20°C to 80°C are preferred.

When such a resin is used, when developing unexposed areas with colored toner, the resin can act as a resin that has adhesiveness to the toner, resulting in good developability (image formation by toner development). become.

As such a resin, any resin that exhibits the above-mentioned adhesiveness can be preferably used, and for example, the following novolac resins and acrylic resins can be preferably used.

That is, when forming a positive photosensitive resin layer as a positive photosensitive layer, a novolac resin obtained by polycondensation of at least one type of phenol and an active carbonyl compound can be used.

These phenols include all compounds in which at least one hydrogen atom bonded to an aromatic ring is substituted with a hydroxyl group, and specifically, for example, phenol, 0-cresol, m-cresol, p-cresol. , 3.5-xylenol, 2,4-xylenol, 2.5-xylenol, carvacrol, thymol, catechol, resorcinol, hydroquinone, pyrogallol, phloroglucin,
Examples include phenols substituted with alkyl groups (preferably having 1 to 8 carbon atoms).

Active carbonyl compounds include, for example, aldehydes and ketones, and specific examples include formaldehyde, acetaldehyde, benzaldehyde, acrolein, furfural, and acetone.

Examples of polycondensation resins include phenol formaldehyde novolac resin, m-talesol formaldehyde novolac resin, phenol/m-cresol/formaldehyde copolycondensate resin, phenol/p-cresol/formaldehyde copolycondensate resin, m-cresol/p -Cresol/formaldehyde copolycondensate resin, 0-cresol/p-cresol/formaldehyde copolycondensate resin, phenol/0-cresol/m-cresol/
Examples include formaldehyde copolycondensate resin, phenol/0-cresol/p-cresol/formaldehyde copolycondensate resin, and phenol/m-cresol/p-cresol/formaldehyde copolycondensate resin.

A preferred novolac resin has a weight average molecular weight MW of 10
00 and/or the residual content of phenol and cresol (active carbonyl compound) is 10 to 20 wt%. In addition, phenol formaldehyde novolafuku resin can be preferably used, but in that case, the weight average molecular weight MW is 3500 to 500. It is preferable that the number average molecular weight MN is in the range of 1000 to 200.

The molecular weight of the resin was measured by GPC (gel permeation chromatography)6.
Calculation of number average molecular weight MN and weight average molecular weight MW is based on Morio Tsuge, Tatsuya Miyabayashi, and Masayuki Tanaka, “Journal of the Chemical Society of Japan,” 800.
The method described on pages 805 to 805 (1972) is used to level out the peaks of the oligomer region (connecting the centers of the peaks and valleys).

In addition, in the novolanc resin, pyrolysis gas chromatography (PGC) can be used as a method for determining the quantitative ratio of different phenols used in the synthesis. Regarding pyrolysis gas chromatography, its principles, equipment, and experimental conditions are described, for example, in the Journal of the Chemical Society of Japan, "New Experimental Chemistry Course" by Arata Tsuge, Volume 19,
The method for qualitative analysis of novolac resins using pyrolysis gas chromatography is described in Polymer Chemistry (1) pp. 474-485 (Maruzen, 1978), and Morio Tsuge,
Takashi Tanaka, Masayuki Tanaka, “Analytical Chemistry” Volume 18, 47-52
(1969).

Furthermore, acrylic resin can be used as the resin for forming the positive photosensitive resin layer.

In this case, it is preferable to use an alkyl acrylate as the monomer, and n-butyl acrylate and 2-ethylhexyl acrylate can be preferably used as the alkyl acrylate.

In particular, an acrylic resin containing a structural unit having an aromatic hydroxyl group represented by the following general formula (1) in its molecular structure can be preferably used. For example, a preferred acrylic resin includes 5 to 20 mol% of a monomer that provides the structure represented by the following general formula (1), 60 to 95 mol% of an alkyl acrylate, and a monomer having an alcoholic hydroxyl group as other components ( For example, it is a resin obtained from a monomer system containing 0 to 10 mol% of acrylic acids (eg, hydroxyethyl acrylate, 2-hydroxyethyl acrylate) and acrylic acids.

General Formula (1) In General Formula (1), RI 1 and RI 2 each independently represent a hydrogen atom, an alkyl group, or a carboxylic acid group.

R11 is a hydrogen atom, a halogen atom, or an alkyl group, R
Eyes represent hydrogen atoms, alkyl groups, phenyl groups or aralkyl groups. X represents a divalent organic group that connects to a nitrogen atom and an aromatic carbon atom. n is 0 or 1. Y represents a phenylene group which may have a substituent or a naphthylene group which may have a substituent.

Specifically, examples of monomers forming the structural unit represented by the above general formula (1) include N-(4-hydroxyphenyl)-(meth)acrylamide, N-(2-hydroxyphenyl)-(meth) ) acrylamide, N-(4
(meth)acrylamide monomers such as -hydroxynaphthyl)-(meth)acrylamide; o-, m- or p-hydroxyphenyl (meth)acrylate monomers: o-, m- or p-hydroxystyrene monomers, etc. . Preferably o-, m- or p-hydroxyphenyl (meth)acrylate monomers, N-
(4-hydroxyphenyl)-(meth)acrylamide monomer, more preferably N-(4-hydroxyphenyl)-(meth)acrylamide monomer.

When using an acrylic resin, its preferable weight average molecular weight is 1,000 to 1 in terms of developability or resolution when a low alkaline aqueous solution is used as a developer.
00.000, more preferably 1,0
A range of 0.00 to 30.000 is preferred.

These can be synthesized by well-known copolymerization methods.

Specific examples of such polymer compounds include copolymers having the following structure.

C-r CH:l (Weight average molecular weight: 1,000-30.000)
j! :m:n=(1-25):(5-40):(50
~95) Furthermore, as a resin when constituting the colored transfer image forming material according to the present invention, a carboxylic acid vinyl ester polymerized unit, preferably R" C00cll = CHz
A polymer compound having a polymerized unit represented by (R'' represents an alkyl group having 1 to 17 carbon atoms) in its molecular structure can be used.

The positive photosensitive layer of the transfer image forming material according to the present invention can contain various positive photosensitive compounds.

For example, typically, an O-quinone azide compound that functions as a photosensitizer can be used.

Specifically, for example, 1,2-benzoquinonediazide-4
- Condensation of sulfonyl chloride, 1,2-naphthoquinonediazide-4-sulfonyl chloride, 1,2-naphthoquinonediazide-5-sulfonyl chloride, 1,2-naphthoquinonediazide-6-sulfonyl chloride and a compound containing a hydroxyl group and/or an amino group. Compounds that have been used are preferably used.

Examples of the hydroxyl group-containing compound include trihydroxybenzophenone, dihydroxyanthraquinone, bisphenol A1 phenol novolak resin, resorcin benzaldehyde condensation resin, and pyrogallol acetone condensation resin. Examples of amino group-containing compounds include aniline, p-aminodiphenylamine, p-aminobenzophenone, 4,4'-diaminodiphenylamine,
゜4“-diaminobenzophenone and the like.

Regarding quinonediazide compounds, including those described here, please refer to "Light Sensitive Systems J" by J. Kosar.
-tive System) (-'-New York City,
7”) Illy & Sons, published in 1965),
and Ken Nagamatsu, “Photosensitive Polymers” (Kodansha, 1977)
2009, published).

When carrying out the present invention, a tackifier, a plasticizer (which can function as a softening point and tackiness modifier), a coating property agent, etc. may be added to the photosensitive layer as necessary. .

Tackifiers include tackifying resins such as rosin, dammar, copal, hydrogenated rosin, hydrogenated rosin ester, coumaron indene, polyterpene, phenolic resin, alkyd resin, petroleum hydrocarbon resin, xylene resin, and epoxy resin. , fucuric acid esters, phosphoric acid esters, chlorinated fluorine, animal/vegetable fats and oils, and mineral oils.

By using such a tackifier, it is possible to improve the tackiness of the photosensitive layer.

Examples of the plasticizer include various low-molecular compounds, such as phthalic acid esters, triphenylphosphini 1, and maleic acid esters.

Such a plasticizer can adjust the softening point and tackiness of the photosensitive layer.

Examples of the coating property improving agent include surfactants such as fluorine-based surfactants, nonionic surfactants typified by ethyl cellulose polyalkylene ether, and the like.

The transfer image forming material according to the present invention can be provided with an overcoat layer above the colored photosensitive layer (layer on the opposite side from the support). Thereby, for example, it is possible to prevent scratches during exposure.

The overcoat I layer can be matte. This overcoat layer may be a mechanically capped layer or a resin layer containing a matting agent. Mantle agents include silicon dioxide, zinc oxide,
titanium oxide, zirconium oxide, glass particles, alumina, starch, polymer particles (e.g. particles of polymethyl methacrylate, polystyrene, phenolic resin, etc.), and U.S. Pat.
The cloak agents described in each specification of No. 101 are included. The resin used in the overcoat layer containing the matting agent may be selected as appropriate. Specifically, for example, gum arabic, glue, gelatin, casein, celluloses (such as viscose, methylcellulose, ethylcellulose,
hydroxyethyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose, etc.), starch starch (e.g. soluble starch, modified starch, etc.), polyvinyl alcohol, polyethylene oxide, polyacrylic acid, polyacrylamide, polyvinyl methyl ether,
Examples include polyvinylpyrrolidone and polyamide. Two or more of these can also be used in combination.

Although the support for the image forming material according to the present invention is arbitrary, a transparent support is preferably used. As a transparent support,
A polyester film, particularly a two-wheel stretched polyethylene terephthalate film, is preferred in terms of dimensional stability against water and heat. In addition, acetate film, polyvinyl chloride film, polyethylene film, polypropylene film, etc. can be used.

In the transfer image forming method of the present invention, a colored image obtained by development is transferred to a transfer material, but at this time, only the image area from the image obtained on the support is directly transferred onto the transfer material. , type B in which layers are stacked can be used. That is, one preferred embodiment is that only the colored image M that substantially forms an image is transferred and laminated. in this case,
In order to efficiently transfer the image onto the transfer surface and to make it easier to remove the support after image transfer, an appropriate f is applied to the surface of the support.
8. It is preferable to perform mold release treatment using an oily substance or to provide a female mold layer on the support.

As such a T8 oily substance, for example, silicone resin, fluororesin, fluorine surfactant, polyolefin, polyamide, etc. can be used, and as a release layer, for example, alcohol-soluble polyamide, alcohol and maleic anhydride can be used. Blends of partially esterified resins of copolymers with methoxymethylated nylon, polyvinyl acetate, polyacrylates, copolymers of polymethyl methacrylate and acrylates, polyvinyl chloride, copolymers of vinyl chloride and vinyl acetate Polymer, polyvinyl butyrald,
cellulose acetate phthalate, methyl cellulose,
Ethylcellulose, cellulose diacetate, cellulose triacetate, polyvinyl alcohol, butylcellulose, hydroxyethylcellulose, carboxymethylcellulose,
Cyanoethyl cellulose, cellulose acetate, cellulose triacetate, cellulose acetate butyrate, hydroxypropyl methylcellulose phthalate,
Hydroxypropyl methylcellulose hexahydrophthalate, a mixture thereof, etc. can be used.

The thickness of the release layer is preferably in the range of 0.01 μm to 10 μm, particularly preferably in the range of 0.1 μm to 5 μm.

In order to improve mold releasability, a particularly preferred embodiment includes providing a polypropylene layer or a polyethylene layer that is thinner than the thickness of the support.

Methods for forming a polypropylene layer or a polyethylene layer on a support include (1) gluing a solution of polyvinyl acetate, polyvinyl chloride, epoxy resin, polyurethane resin, natural rubber, synthetic rubber, etc. dissolved in a organic solvent; After applying these adhesives on a support and drying them with hot air or heating, a polypropylene film or a polyethylene film is overlapped and laminated by pressing under heat.
So-called dry lamination method; (2) Using a copolymer of ethylene and vinyl acetate, a copolymer of ethylene and acrylic ester, polyamide resin, petroleum resin, rosin, wax, or a mixture thereof as an adhesive, these adhesives After applying the material onto a support by a doctor blade method, roll coating method, gravure method, reverse roll method, etc. while keeping it in a molten state by heating it as it is,
The so-called hot-melt lamination method, in which polypropylene or polyethylene films are immediately laminated together and laminated by heating at a high temperature if necessary and then cooling; (3) The polypropylene or polyethylene is kept in a molten state and laminated using an extruder. This is the so-called extrusion lamination method, in which the film is extruded into a film, and while it is still in a molten state, a support is bonded and laminated; Examples include a so-called coextrusion method in which a polypropylene layer or a polyethylene layer is formed on a support film by multiple moldings using polypropylene or polyethylene in a molten state.

Next, in the colored image forming method of the present invention, the transfer image forming material according to the present invention is imagewise exposed, and the exposed areas are subjected to alkali elution and
The unexposed areas are eluted and the unexposed areas are developed with toner.

Various types of exposure means can be used as desired depending on the image to be formed. For example, a method of imagewise exposure through a color separation mask or the like can be used.

The exposed part? The alkaline eluent used for the weighting can be arbitrarily selected depending on the structure of the photosensitive layer used. Preferably, an alkaline eluent containing an alkaline agent and an anionic surfactant is used.

Usable alkaline agents include (1) sodium silicate, potassium silicate, potassium hydroxide, sodium hydroxide, lithium hydroxide, dibasic or tribasic sodium or ammonium phosphate, sodium metasilicate, sodium carbonate, ammonia; (2) mono-, di-, or trimethylamine;
Mono-, di-, or triethylamine, mono- or diisopropylamine, n-butylamine, mono.

Examples include organic amine compounds such as di- or triethanolamine, mono-di- or triisopropanolamine, ethyleneimine, and ethylenediimine.

In addition, as anionic surfactants that can be used, (1)
Higher alcohol sulfate esters (e.g., sodium salt of lauryl alcohol sulfate, ammonium salt of octyl alcohol sulfate, ammonium salt of lauryl alcohol sulfate, disodium alkyl sulfate, etc.), (2) Aliphatic alcohol phosphate ester salts (e.g. ,
(3) Alkylaryl sulfonate salts (eg, sodium dodecylbenzenesulfonate, sodium isopropylnaphthalenesulfonate, etc.).

dinaphthalene sulfone sulfonic acid sodium salt, metanitrobenzene sulfonic acid sodium salt, etc.) (4) Alkylamide sulfonate salts (C+?HffsCON CIIzCHzSOaN
a) C1,1 (5) Sulfonic acid salts of dibasic aliphatic esters (e.g. sodium sulfosuccinate dioctyl ester, sodium dihexyl sulfosuccinate, etc.) (6) Formaldehyde condensates of alkylnaphthalene sulfonates (e.g. dibutylnaphthalene) formaldehyde condensate of sodium sulfonate, etc.).

The alkaline agent and anionic surfactant can be used in any combination.

In the present invention, any toner for developing the unexposed area can be used as long as it has the effect of toner development. For example, colored powder can be preferably used.

As the colored powder that can be used, colored particles consisting of pigments, dyes, or mixtures thereof can be used, and furthermore, colorless polymer particles added to the colored particles can be used. can.

Various types of colored particles can be used as desired, and when used as proofreading particles, -S should be added to the ordinary colors required for the color composition, that is, yellow, magenta, cyan, and black. Pigments and dyes of matching tone are used. In particular, it is suitable to use pigments of each color used in printing ink to obtain a color image that resembles a printed matter. The following examples are some of the many pigments and dyes known in the art. (C, I mean color index) Victoria Pure Blue (C, I 42595) Orami 7 (C, I 41000) Cachilon Brilliant Flavin (C, I Basic 13
) Rhodamine 6GCP (C, I 45160) Rhodamine B (C, I 45170) Safranin 0K70:1
00 (C,I 50240) Erioglaucine X (C
, I 42080) First blank) IB (C,
126150) No, 1201 Lionor Yellow
(C,I 21090) Lionor Yellow GRO (C
, I 21090) Shimla Fast Yellow 8GF
(C, I 21105) 'Benzidine Yellow 4T-5640 (C, + 21095) Zimler Firth Trend 4015 (C, I 12355) Lionol Rethod 7B4401 (C, I 15830) First Gen Blue TGII-L (C, r 74160
) Lionor Blue-SM (C, I 26150) Mitsubishi Carbon Black MA-100 Mitsubishi Carbon Black +130.140.1150 Such pigments and dyes may be used as colored particles as they are, but they may be used by surface treatment with polysiloxane etc. Alternatively, it is preferable to use colored particles by grinding a fraction or kneading in a resin such as polyvinyl chloride, cellulose acetate, cellulose acetate butyrate, polystyrene, polymethacrylate, etc. to an appropriate effective particle size. You can also get it. The effective particle diameter of the colored particles is suitably 0.2 to 50 μmφ, particularly 0.5 to 30 μmφ.
μmφ is preferred.

As the colorless polymer particles, 5 to 60 μm of high molecular weight polymers such as polymethyl methacrylate, polyethyl methacrylate, polyethylene, polyvinyl chloride, α-olefin/(anhydrous) maleic acid copolymer, and cellulose acetate are used.
Atomized particles with a particle size of mφ can be used. Such colorless polymer particles can be mixed with the above-mentioned colored particles at a ratio of 1=3 to 3:1, and thereby,
Colored particles can be more uniformly attached to the unexposed portion of the photosensitive layer (for example, photosensitive resin layer) after alkali elution.

During development with toner, it is preferable to heat the colored image forming material (for example, heating at 40 to 80° C.).

In the colored transfer image forming method of the present invention, a colored image obtained by development is transferred to a transfer material. In this transfer, preferably, as described above, only the formed image is transferred. The material to be transferred is arbitrary, and for example, printing paper can be used. As a transfer method, for example, a means for transferring an image by combining an image forming material and a transfer material under heat and/or pressure can be used. A method such as sandwiching both materials between rollers and allowing them to pass may be adopted as appropriate.

(Example〕 Examples of the present invention and comparative examples will be described below.

It should be noted that, as a matter of course, the present invention is not limited to the embodiments described below (and can take various forms).

Example 1 A photosensitive liquid having the following composition was applied with a wire bar onto the polypropylene surface of a support made by dry laminating a 20 μm thick polypropylene film on a 50 μm thick polyethylene terephthalate film.
It was dried for 5 minutes in a hot air dryer at 60° C. to obtain a photo-soluble bad light layer with a thickness of 1 μm.

<Photosensitive liquid> L-butylphenol-naphthoquinone-1,2-diazide sulfonic acid ester 0.616 g The following binder polymer 4.384 g Ethyl cellosolve 39.6 g (binder polymer) H3 □ (1: m: n = 10: 85 :5, MW
= 17, ooo) Next, an overcoat liquid having the following composition was applied to the surface of the photo-soluble photosensitive layer using a wire bar so that the film thickness after application and drying was 1 μm, and a colored transfer image forming material was applied. A certain photosensitive sheet was obtained.

Overcoat; Night> Polyvinyl alcohol (Product name: GOHSENOL GL-05, Nippon Gohsen Kagaku@
) 10g water 10
0g A decomposition positive film was closely attached to the polyethylene terephthalate film surface of this photosensitive sheet, and it was heated with a high-pressure mercury lamp for 1 hour.
An exposure of 00 mJ/c++l was given.

Next, by immersing it in the following developer for 30 seconds, an adhesive image corresponding to a decomposed positive film was obtained.

Developer solution> NazC0 315g Surfactant (Perex NBL manufactured by Kao Atlas Co., Ltd.) 50g Water
1000 g Next, a carbon brush was applied to the surface of the exposed photosensitive layer.

A black powder obtained by mixing 1:1 of black particles obtained by dispersing silica in cellulose acetate and cellulose acetate particles is provided, and the surface of the photosensitive layer is lightly rubbed using a cotton band to remove excess black powder. As a result, the black powder adhered only to the unexposed portions of the surface of the photosensitive layer.

Next, place the image surface of the black color image and the art paper in close contact, and
5 kg between a pair of nip rolls heated to 0°C
After passing at a speed of 50 cm/min under pressurized conditions of /cJ, the support was peeled off. Peeling is easy;
Only the black image area was transferred onto the art paper.

Example 2 Four photosensitive sheets obtained in the same manner as described in Example 1 were arranged in an exposure device, and four separated positive films corresponding to each color were placed on the polyethylene terephthalate film surface of each photosensitive sheet using a bin system. After using and superimposing them, they were vacuum-adhered and exposed to light of 100 mJ/cot using a high-pressure mercury lamp. Next, the four image-exposed photosensitive sheets were developed in the same manner as in Example 1 to obtain adhesive images corresponding to each color separation positive film.

Next, in the same manner as in Example 1, the following colored powders were used to adhere the corresponding colored powders to the four adhesive image sheets.

(Black powder) Carbon black particles/cellulose acetate particles = 1/1 (Yellow powder) Benzidine Yellow 4T-564-D/cellulose acetate≠1. / 1 (I color powder) phthalocyanine blue/cellulose acetate) = 1/1 (red powder) quinacridone magenta/cellulose acetate = 1/1 (the mixing ratio of each powder is a weight/weight ratio).

First, place the image surface of the black color image and the art paper in close contact, and
5 kg / between a pair of nip rolls heated to 0℃
After passing through cnT at a speed of 50 cm/min under pressurized conditions, the support was peeled off. Peeling is easy;
Only the black image area was transferred onto the art paper.

Subsequently, colored images were transferred in the order of cyan, magenta, and yellow, thereby obtaining a color proofing image consisting of four colors on the art paper.

Only the image area was transferred, and the finish was very similar to the actual printed matter.

Example 3 A photosensitive solution having the following composition was coated with a wire bar on a polypropylene support made by laminating a 20 μm thick polypropylene film on a 50 μm thick polyethylene terephthalate film by a dry lamination method.
It was dried for 5 minutes in a hot air dryer at .degree. C. to obtain a photo-soluble photosensitive layer with a thickness of 1 .mu.m.

<Photosensitive liquid> t-Butylphenol-naphthoquinone-1,2-diazide sulfonic acid ester 0.616 g Phenol formaldehyde novolac resin (MW: 1500, MN: 700)
4.334 g petroleum resin (Picolite A-115
J Rika Vercules') 0.219
g Ethyl cellosolve 39.6g A decomposed positive film was closely attached to the polyethylene terephthalate film surface of the photosensitive sheet, which is the colored transfer image forming material thus obtained, and heated to 100 mJ/c++ with a high-pressure mercury lamp.
1 exposure was given.

Next, by immersing it in the following developer for 30 seconds, an L adhesive image corresponding to the decomposed positive film was obtained.

<Developer> NazCO 315g Surfactant (Perex NBL manufactured by Kao Atlas Co., Ltd.) 50g Water
Next, the polyethylene terephthalate film side of this adhesive image film was placed on a hot plate heated to 50°C, and black particles prepared by dispersing carbon blank in cellulose acetate and cellulose acetate particles were placed on the exposed photosensitive layer surface. When the black powder obtained by mixing 1=1 was applied and the surface of the photosensitive layer was lightly rubbed using a cotton pad to remove excess black powder, black powder was found only on the unexposed part of the surface of the photosensitive layer. was sticky.

Next, place the image surface of the black color image and the art paper in close contact, and
5 kg / between a pair of nip rolls heated to 0℃
After passing at a speed of 50 cm/min under cll heating conditions, the support was peeled off. Peeling is easy;
Only the blank color image area was transferred onto the art paper.

Comparative Example 1 A release layer solution having the following composition was applied onto a polyethylene terephthalate film having a thickness of 75 μm so that the dry film thickness was 0.5 μm to prepare a support having a releasable surface.

(Release layer solution) Torezin F-30 (alcohol-soluble nylon, manufactured by Toshi) 10 g methanol 90 g Next, four colored photosensitive composition dispersions having the following composition were prepared, and the dry film thickness was 1.
It was coated on the release layer so as to have a thickness of .mu.m, thereby producing four-color image forming materials.

(Colored photosensitive composition dispersion) t-butylphenol-naphthoquinone-1,2°-diazide sulfonic acid ester 0.616 g phenol m
-Cresol・p-Cresol (molar ratio 20:48:32)・
Formaldehyde novolac resin 4.384g (weight average molecule MW: 6635, number average molecule iMN: 12
33) The following pigment ethyl cellosolve 36.9 g
Fluorine surfactant (manufactured by 3M Company, FC-430) 0.
25 g (pigment) Black: Carbon black MA'-100 (manufactured by Mitsubishi Kasei) 0.99 g Cyan Nidianin Blue 4920 (manufactured by Dainichiseika) 0.55 g Magenta: Seika First Carmine 1483 (manufactured by Dainichiseika) 0 .68 g Yellow: Seika First Yellow H-7055 (manufactured by Dainichiseika) 0.68 g A color separation mesh positive film of each color was superimposed on the colored photosensitive layer surface of the obtained four-color image forming material, and a 4 kW metal halide lamp was used. Perform image exposure for 60 seconds from a distance of 50 cm with
Development was carried out by immersion in a 21-fold diluted solution of DR-1 (Conical S plate developer: manufactured by Konica) for 30 seconds to form a colored image in four colors.

Next, an image-receiving layer solution having the following composition was applied onto another polyethylene terephthalate film to a dry film thickness of 20 μm and dried to prepare image-receiving sheet 1-.

(Image receiving N solution) Vinyl chloride/vinyl acetate copolymer (composition ratio 75:25, MPR-T-5 manufactured by Nissin Chemical Co., Ltd.) 18 g Pentaerythritol tetraacrylate 1 g Michler's ketone 0.1 g Benzophenone 0.64 g Paramethoxyphenol 0 .018 g methyl ethyl ketone
44 g of the previously obtained yellow image is brought into close contact with the image-receiving layer surface of the image-receiving sheet, and passed between a pair of nip rolls heated to 90° C. at a speed of 50 cInZ under a pressure of 5 kg/ci. As a result, the yellow color image was transferred onto the image-receiving layer, and the polyethylene terephthalate film on the color image side was peeled off.

Subsequently, the colored image is transferred in the order of magenta, cyan, and black, and the image side of the image-receiving sheet is brought into close contact with art paper, and the image-receiving sheet is passed between a pair of nip rolls under the same conditions as described above. 5Qc on the polyethylene terephthalate film surface with a 4kW metal halide lamp
Full-surface exposure was applied for 30 seconds from a distance of m, and then the polyethylene terephthalate film of the image-receiving sheet was peeled off.

A multicolor proofing image was formed on art paper, but since the entire surface of the resulting image was covered with a transparent resin layer that was an image-receiving layer, the gloss of the image surface was too high.
The image quality of the printed matter obtained with ordinary offset printing was confusing.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to obtain a transferred image that is not covered with a polymer film, and therefore, when used as a color proof for proofing, it is possible to obtain an image that is extremely similar to the actual printed matter. .

Claims (1)

[Claims] 1. A colored image forming material having a positive photosensitive layer on a support is subjected to (a) imagewise exposure, (b) eluting the exposed areas with an alkaline eluent, and (c) unexposed. A method for forming a colored transfer image, comprising: (d) developing the colored image with a colored toner; and (d) transferring the obtained colored image to a transfer material.