JPH01169450A - Transferred image forming method - Google Patents

Abstract

PURPOSE:To form a transferred image of the high quality approximate to the quality of an ordinary offset printed image by transferring only the image part of a colored image onto a material to be transferred. CONSTITUTION:Only the image is transferred to the material to be transferred from the colored image formed on the base formed by subjecting a colored image forming material having a colored photosensitive layer contg. at least a photosensitive compd. which is insolubilized in a developing soln. by projection of active rays and a coloring agent on the base to at least imagewise exposing and development processing, by which the transferred image is obtd. Only the image part is transferred and laminated directly on the material to be transferred from the colored images obtd. on the base. The base surface is preferably subjected to a release treatment by a suitable oil-repellent material or a release layer is provided on the base in order to facilitate the peeling of the base after the image transfer. The image quality extremely approximate to the quality of the printed image formed by ink on printing paper is thereby obtd.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a transfer image forming method using a color proof for color proofing in color printing. The present invention relates to a transfer image forming method capable of obtaining transfer images of similar quality.

[Prior art] Color sheets for color proofing (
The use of color proofs (hereinafter referred to as "color proofs") is well known in the art.

As a method of creating a multicolor transfer image using a color proof for color proofing, for example, H4H?, which is described in Japanese Patent Application Laid-Open No. 47-418309, transfers a colored image directly to the final image receiving paper.
1' so-called direct transfer method, for example, JP-A-59-97
No. 140 discloses a so-called indirect transfer method in which a colored image is temporarily transferred and laminated onto a temporary image-receiving sheet and then transferred again onto a final image-receiving paper;
Examples include the method described in Japanese Patent No. 501217, in which the process of transferring a colored photosensitive layer to image-receiving paper and then repeating the process of forming an image is repeated.

[Problems to be Solved by the Invention] In both of Tateki's methods, the surface of the transferred material containing the transferred image is heated and plasticized! If! Because of the coalescence coating, the gloss of the image surface is too high, giving an impression that the image quality is different from that of the printed matter used for actual printing. .

Since color proofs are originally used to predict the image reproduction of the final printed matter, it is strongly desired that the image of the color proof be as close as possible to that of the printed matter. For this purpose, a so-called matte sheet with a roughened surface is applied to the image surface of the colored image formed on the transfer material and passed through heated and pressurized nip rolls. Work has been carried out to reduce gloss, but these steps are troublesome for workers; considering the similarity to printed images of various Inryu paper 1- with different gloss levels, rough surface In addition, even if the gloss of the image surface is reduced by matting, the resulting image surface will not be covered by the thermoplastic organic polymer layer. Since the ink is coated with ink, there remain problems such as the sense of incongruity with the printed image formed only with ink on the printing paper.

In order to solve the above-mentioned problems, the present invention transfers only the image portion onto the transfer material, that is, by exposing the surface of the non-image portion of the transfer material, only ink is formed on the printing paper. The aim is to obtain image quality that is extremely close to that of printed image quality.

The above-mentioned object of the present invention is to provide a colored photosensitive layer having a colored photosensitive layer on a support that contains at least a photosensitive composition and a colorant that becomes insolubilized in a developer by irradiation with actinic rays. Transfer image formation characterized in that only an image area is transferred to a transfer material to obtain a transfer 1iIjS from a colored image formed on the support by subjecting the image forming material to at least imagewise exposure and development processing. This was achieved by applying 12 methods.

The present invention will be explained in further detail below.

In the present invention, a colored image-forming material having a colored photosensitive layer on a support, which contains a photosensitive composition and a colorant that becomes insolubilized in a developing solution by irradiation with actinic rays, is imagewise exposed through a color separation mask. After development, a colored image is formed. From the colored image obtained on the support, only the image area is directly transferred onto the transfer material and erased. Even with sandstone, only the colored image layer that essentially forms an image is transferred, #1
Layered. In this case, in order to efficiently transfer the 1iIIIi image onto the transfer surface and to facilitate peeling off the support after transferring the 1iIIIi image, the surface of the support should be subjected to a release treatment using an appropriate oil-repellent substance, or the support It is preferable to apply a release layer on the body.

Examples of such oil-repellent substances include silicone [1
, fluorine T14 resin, fluorine surfactant, polyolefin, polyamide, etc. can be used, and as the release layer, for example, alcohol-soluble polyamide, alcohol-soluble nylon, partial ester of copolymer of styrene and maleic anhydride, etc. can be used. blends of polymerized resins and methoxymethylated nylon, polyvinyl acetate, polyacrylates, copolymers of polymethyl methacrylate-1 and acrylate, polyvinyl chloride, copolymers of vinyl chloride and rnm vinyl, Polyvinyl butylade, cellulose acetate-1
hephthalate, methylyl-O-s, ethyl cellulose,
Cellulose diacetate, cellulose triacetate, polyvinylalnylene, butyllerulose, hydroxyethyl t=/
Rellose, carbo V dimethylcellulose cete-1, cellulose 1-rearetate, cellulose acetate bubre 1, hydroxypropylmethyl t
'/Relose Fucre 1~, hydro=t-dipropylmethylcellulose to xyhydrophthalate, or mixtures thereof, etc. can be used.

- The thickness of the type 1 layer is preferably 0.01 μm to 30 μm.
f! range, particularly preferably 0.1 μm to 5 μm
is within the range of

In order to improve mold releasability, a particularly preferred embodiment includes a polypropylene layer or a polyethylene layer having a thickness greater than the thickness of the support.

The method for attaching a polypropylene layer or a polyethylene layer to a support is as follows: 1) A solution of polyvinyl acetate, polyvinyl chloride, epoxy resin, polyurethane resin, natural rubber, synthetic rubber, etc. dissolved in an organic solvent is used. The so-called dry lamination method involves applying these adhesives on a support, drying them with hot air or heating, and then overlapping polypropylene or polyethylene films and pressing them under heat to laminate.
2) Polymers of ethylene and vinyl acetate, co-compounds of ethylene and acrylic esters, polyamide resins, petroleum resins,
Using rosin, wax, or a mixture thereof as an adhesive, the adhesive is heated and kept in a molten state while being applied to the support using a doctor blade method or a roll-to-roll method.
Immediately after applying the film using a method such as a method, a gravure method, a reverse roll method, etc., a polypropylene film or a polyethylene film is laminated in one layer, heated to a temperature of 100°C as necessary, and then cooled. Hot melt lamination method; 3) So-called extrusion lamination i.
Method; 4) When molding a film to serve as a support by melt extrusion, multiple extruders are used to mold polypropylene or polyethylene in a molten state two times to form polypropylene onto a support film. A so-called coextrusion method for forming a polyethylene layer or a polyethylene layer can be mentioned.

As the transparent support for the colored image-forming material used in the present invention, a polyester film, particularly a biaxially oriented polyethylene terephthalate film, is preferable in terms of dimensional stability against water and heat, but acetate film, polyvinyl chloride film, polystyrene film, etc. Films, polypropylene films, polyethylene films, etc. may also be used.

The colored photosensitive layer of the colored image-forming material used in the present invention is removed imagewise by imagewise exposure and subsequent development to form a colored image.

Various photosensitive compositions can be used as the photosensitive composition that is contained in the aged photosensitive layer of the colored image forming material used in the present invention and becomes insolubilized in the developing solution by irradiation with actinic rays. When irradiated with light, the molecular structure undergoes a chemical change in a short period of time, and its solubility in solvents changes. All compounds such as monomers, prepolymers, and polymers whose unexposed portions are dissolved away are included. Examples of photosensitive compositions that can be used include photocrosslinkable photosensitive resin systems typified by polyvinyl alcohol esterified with cinnamic acid; diazonium salts and condensates thereof, polyvinyl alcohol, polyvinylpyrrolidone, There are systems mixed with polyacrylamide, etc.; there are also systems mixed with binders such as cyclized rubber using an aromatic azide compound as a photocrosslinking agent, and photosensitive resins using photoradical polymerization or photoionic polymerization may also be used. Can be done.

In particular, a photosensitive composition that becomes insolubilized in a developer consisting of an alkaline aqueous solution upon irradiation with actinic rays may be used.

In addition, Moeki's colored photosensitive layer generally contains various binders, but in the present invention, the binder used in J3 is a film-forming and soluble alkali aqueous solution, and an alkali ring! lA
? Preferred are polymeric compounds that can be dissolved or wetted with li.

Specific examples of such polymer compounds include yI aromatic water Fi! represented by the following general formula [1]. Examples include polymeric compounds that contain structural units that represent a group in the structure of the molecule.

In formula E, R1 and [Se2 are each a hydrogen atom, an alkyl group, or a carbon l'i! ! represents a hydrogen atom, R3 represents a hydrogen atom, a halogen atom, or an al;1-l group, R4 represents a hydrogen atom, an alkyl group, a phenyl group, or an aralgyl group, and Y is substituted! represents a phenylene group that may have 1% or a naphthylene group that may have a substituent; Or 1. ] Specifically, as the monomer forming the structural unit represented by the above general formula 1'l'l, for example, N-(4-human
”21diphenyl)-(meth)acrylamide, N-(
2-hydroxyphenyl)-(meth)acrylamide,
(meth)acrylamide monomer such as N-(4-hydroxynaphthyl)-(meth)acrylamide; o-1
-Mono- or p-hydroxyphenyl (meth)acrylate monomer; Examples include 0-1- or p-hydroxystyrene monomer. Preferably, 0-1 or p
- hydroxyphenyl (meth)acrylate monomer,
N-(4-human 0-xyphenyl)-(meth)acrylamide monomer, more preferably N-(4-human 04-diphenyl)-(meth)acrylamide monomer.

In the present invention, it is preferable to use a co-merger of a monomer forming the structure represented by the general formula [I] and the following monomers as the binder.

Acrylic O21-lyl; R5 H2-C Chang alkyl acrylate; 1 (5 CH2=C moRa acrylic acid; 1 and 5 Cl l 2 = C G -OH where [<5 is a hydrogen atom, an alkyl group , or a halogen atom, and R6 represents an alkyl group, a phenyl group or a naphthyl group.

The ratio of the group having aromatic hydroxyl JJ represented by general formula [I] in the co-m combination is preferably 1 to 30 mol%.

The proportion of the units formed from the acrylonitriles in the copolymer is preferably 0 to 50%, and more preferably 5 to 40% from the viewpoint of developability. The proportion of structural units formed from the above alkyl acrylates is 5
A range of 0 to 95% is suitable from the viewpoint of developability with a low alkaline aqueous solution, and a range of 60 to 95% provides the most suitable developability.

In addition, the proportion of the structural units formed from the above-mentioned acrylic acids such as acrylic acid or methacrylic acid in the copolymer is preferably 0 to 20 mol%, most preferably 0 to 10%, considering the development radiation. It is.

The v1m average molecular m of such a polymer compound is preferably from 1000 to 100,000, more preferably from 1000 to 30,000, from the viewpoint of developability or resolution when a low alkaline aqueous solution is used as a developer. Preferably, the range is . These polymer compounds can be synthesized by a well-known copolymerization method.

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

C1l.

Z: Cypress: n = (1-25): (5-40): (50
95) The present invention also uses as a binder noborane, which is produced in the polycondensation of at least one type of phenol and an active carbonyl compound.

In the above phenols, at least one hydrogen atom bonded to an aromatic ring is water lS! It includes all compounds substituted with two groups, and specifically includes phenol, 0-cresol, m-cresol, p-cresol, 3.5-xylenol, 2.4-xylenol, 2.5-xylenol, carvacrol. , dimol, kab:1-l, resorcinol, hydroni-1:non, pyrogallol, fucologlucin, alkyl group (1 to 8 carbon atoms) substituted phenol, and the like.

The above-mentioned active carbonyl compounds include, for example, aldehydes, carbonyl compounds, etc., and specifically, for example, formaldehyde, aretaldehyde, benzaldehyde, and carbonyl compounds.
Main, furfural, at? Examples include I-n and the like.

The novolac VJJ resins include phenol formaldehyde novolac resin, m-cresol formaldehyde novolac resin, phenol/Sho-cresol/formaldehyde copolycondensate resin, phenol-D-cresol/formaldehyde copolycondensate resin, m-cresol/p -Cresol/formaldehyde copolycondensate resin, 0-cresol/p-cresol/formaldehyde copolycondensate resin, 71nol/0-cresol/m
-Cresol/formaldehyde copolycondensate resin, phenol/O-cresol/0-cresol/formaldehyde copolycondensate resin, phenol/m-cresol/
1)-Cresol/formaldehyde copolycondensate resin, etc. can be mentioned.

A preferred novolac resin is a phenol formaldehyde novolac resin, which has an mff1 average molecular mMW of 35
00-500. Preferably, the number average molecular mMn is in the range of 1000 to 200.

The measurement of the molecular chain of the above novolac resin is performed using G I) C (
It is carried out by gel verge 1-john chromatography method). Number average molecule ffiMn and weight average molecule mrv
The Q output of +w is obtained by leveling the peaks in the oligomer region (by smoothing the peaks and valleys of the peaks) using the method described in Morio Takushoku, Tatsuya Miyabayashi, and Masayuki Yamanaka, "Journal of the Chemical Society of Japan," pages 800-805 (1972). It is spelled as something done by the method of connecting the center.

Pyrolysis gas chromatography (PGC) is used as a method for confirming the ratio of different phenols used in the synthesis of the novolak resin.

Regarding pyrolysis gas chromatography, its rA principle, 'Rm Jy, and experimental conditions are described in, for example, the Journal of the Chemical Society of Japan, Takushoku Shinsho New Experimental Course, Volume 19, Polymer Chemistry [11
The method for qualitative analysis of novolak resins using pyrolysis gas chromatography is described in pages 474 to 485 (published in 1978) by Takushoku RVT, Takashi Naka,
Masayuki Yamanaka, Analytical Chemistry, Vol. 18, pp. 47-52 (1
9 (i9).

Other polymeric compounds that can be used as binders in the present invention include sulfoalkyl esters of (meth)acrylic acid (co)polymers, polyacetal (co)polymers, vinyl needle (co)polymers, and acrylamide (co)polymers. Co)polymer, styrene (co)polymer, cellulose VT conductor, etc.・b
Can be mentioned.

Dyes and pigments as colorants are added to the colored photosensitive layer. In particular, when used for color proofing, pigments and dyes with tones matching the yellow, magenta, cyan, and black colors required are required, as well as metal powders, white pigments, and fluorescent pigments. etc. are also used. Many pigments and dyes known in the art can be used in the present invention.

(C, I mean color index).

Victoria Pure Blue (C,l 42595) Auramine (C,+ 41000) Cathylone Brilliant Flavin (C,I Basic 13) Rhodamine 6 G CP (C, 145160) Rhodamine 8 (C1+ 45170 Safranin 0K70: 100 (C,I) 5024
0) Erioglaucine X (C, 142080) F1
-Sj~Black H13 (C, 1261!tO)No
, 1201 Lionor Yellow (C,I 21090
) Lionor Ie I] GRO (C, I 2109
0) Simwarf Earth 1 to Elko 8 GF (
C, I 21105-)benzidine I]-41'
-5041) (C, I 21095) Simwarf Earth 1~Red 4015 (C, l 12355) Lionor Red 784401 (C, + 15830
) F7I-S1-Gun Blue TGR-L (c, +7
11100) Lionor Blue SM (C, 1261
5G) Mitsubishi Carbon Black M A-100 Mitsubishi Carbon Black #30.4t40.950 The colorant/binder ratio of the colored photosensitive layer used in the present invention is determined based on the target optical density and the removability of the colored photosensitive layer to the developer. J: may be determined by a method known to the proponent, taking into account the following: For example, in the case of dye, the content m is 5% to 75% in lff1
In the case of pigments, the appropriate content is 5% to 90% in L mouth M.

In addition, the film thickness of the colored photosensitive layer is determined by a method known to those skilled in the art based on the target optical degree, the type of colorant (dye, pigment, carbon black) used in the colored photosensitive layer, and its content. However, as long as the thickness of the colored photosensitive layer is within the allowable range, the thinnest the colored photosensitive layer is, the higher the resolution and the better the image quality.
It is usually used in the range of 1 (1/ *' / 5 (1/ f).

In addition to the materials described above, the colored photosensitive layer contains
If necessary, a plasticizer, a coating property improver, etc. can also be added.

The plasticizer C is various low-molecular compounds such as phthalic acid esters, 1-liphenylbosphates, maleic acid esters, and the coating property improver is a surfactant such as a fluorine surfactant. Examples include nonionic surfactants typified by ethyl cellulose polyalkylene ether and the like.

Further, the colored photosensitive layer can be divided into two layers: a coloring agent layer made of a colorant and a binder, and a photosensitive layer made of a photosensitive composition and a binder. In this case, any layer may be placed on the support side.

The colored imaging material is imagewise exposed to actinic radiation. At this time, a light source of a bench scale such as an ultra-high pressure mercury lamp, a metal halide lamp, a Kungsden lamp, a mercury lamp, a xenon lamp, a fluorescent lamp, a CRT light source, a laser light source, etc. is used for the imagewise exposure.

In the development carried out after imagewise exposure of the above-mentioned colored image-forming material, an alkaline developer containing water as a main solvent is preferably used as the developer, and the alkaline agent used in the developer is as follows: Thorium carbonate, sodium hydrogen carbonate, sodium silicate, potassium citrate,
Sodium hydroxide, lithium hydroxide, tertiary phosphate 1-
Lium, sodium diphosphate, potassium triphosphate,
Inorganic alkaline agents such as potassium diphosphate, ammonium triphosphate, ammonium diphosphate, sodium metasilicate, sodium bicarbonate, potassium carbonate, ammonium carbonate, ammonium silicate, and mono-, di-, or triethanolamine and hydroxide. An alkali agent such as detraalkylene ammonia is used. The content of alkaline agent in the developer composition is 0.05~
A range of 30 mm% is suitable, and the alkaline developer further contains ethylene glycol monophenyl: I-thyl,
It may also contain organic solvents such as benzyl alcohol and 11-propyl alcohol, surfactants, sulfites, chelating agents such as E D 1'A, antifoaming agents such as sensitive silane compounds, and the like.

Further, the colored image forming material is imagewise exposed and developed, and general printing paper such as art paper, coated paper, high-quality paper, synthetic paper, etc. is used as the transfer material to which the formed colored image is transferred. be able to.

[Example] Example 1 Boria 1 copy 9 of the support was prepared by laminating a 25 μm thick polypropylene film on a 50 μm thick polyethylene terephthalate film by a dry lamination method.
2. A colored photosensitive composition having the following composition (1:1) was applied onto the surface using a wire parser so that the dry film thickness was 1 μm, and then dried.

(Colored photosensitive composition dispersion) - Alkali-soluble polymer composition 50% solution of cellosolve 129 (XI
! m average molecule m17000) ・Pentaerythritol tetraacryle-1-4,3 (J ・Michlerske 1~n o, oag
・Benzophenone 0.25g ・Baras 1-xyphenol 0.01g ・Medyl Cellosolve 94g ・Fluorine surfactant 0.10 (manufactured by 3M Company,
FC-430) ・The following pigments (pigments) Black carbon black 1.98gM -100 (manufactured by Mitsubishi Kasei) Cyan Nidiane Blue 1192'0 1.10
g (manufactured by Okuchi Seika) Magenta: Reika Fast Chikara-Min 1483 1.360 (Okuchi Seika ￥J) Yellow: Seika First I・I'-kuchi-l-1-70551,3GQ (manufactured by Oguchi Seika) The alkali-soluble polymer composition was synthesized by the following method.

1j! In the fourth flask, add hydroxyphenyl methacrylamide 8. asg, acrylonitrile 2.65o,
Weighed 33.11 g of medyl acrylate (1, 1.64 g of azobisisobutyronitrile (polymerization initiator),
Using 00g of edyl alcohol as a solvent, the reaction was carried out at 77°C for 6 hours. After this, add 750 methyl cellosolve,
After the reaction was stopped, ethyl alcohol was distilled off at 160°C for 3 hours. As a result, about 95 g of the polymer composition was obtained as a 50% methyl cellosolve solution.

Next, on the colored photosensitive layer of each color, an overcoat layer solution having the composition shown below is applied using a Wi-V-bar so that the dry film thickness becomes 0.3 μm, and dried. It was created.

(Overtool L-layer solution) - 6 g of polyvinylalnylene (GL-05 manufactured by Nihon Gosei Kagaku Kogyo Co., Ltd.) - Distilled water 97 Q - A-barcode of the four-color colored image forming material obtained with 3 g or more of methanol Lay the color separation mesh negative film of each color on the skin surface 1! , 41 (W
Image exposure was performed for 20 seconds from a distance of 50 cm using a metal halide lamp, and the sample was immersed in the following developer for 30 seconds.J:
Development was performed to form a four-color colored image.

(Developer) ・Na2COa 1! ig・
Surfactant 50 Q (Perex NBL manufactured by Kao Atlasne 1) / Distilled water
1000 (1st, the image surface of the black color image and art paper were brought into close contact and heated to 90°C)
After passing between a pair of nip rolls at a speed of 50 CI/min under a pressurized condition of 5 KO/CI', the support was peeled off. Peeling was easy and a black image was transferred onto the art paper.

Subsequently, colored images were transferred in the order of cyan, magenta, and yellow to obtain a color proofing image consisting of four colors on art paper. Only the colored image part was transferred onto the art paper, that is, the non-image part of the paper was exposed, and the resulting color proofing image closely resembled the image quality of printed matter produced by ordinary offset printing. .

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

(Ill type layer solution) ・Torezin F-30101 (alcohol soluble nylon, manufactured by Toshi) ・Methanol
909 Next, a colored photosensitive composition dispersion J3 and an over two layer solution similar to those in Example 1 were sequentially applied onto the cheek layer and dried to prepare colored 6 image forming materials in four colors.

A color separation mesh negative film of each color was placed on the overcoat layer surface of the colored image forming material of 11 colors, and 4KW was applied.
Ii for 20 seconds from a distance of 50CI11 with a metal halide lamp,! iI image exposure was performed, and development was performed by immersing the sample in the same developer as in Example 1 for 30 seconds to form a four-color colored image.

Next, an image-receiving layer solution having the following composition was coated on another polyethylene prephthalate film to a dry IM of 7720 μl and dried to prepare an image-receiving sheet.

(Image receiving i solution) - Vinyl chloride/Ml [vinyl copolymer 18su (composition ratio 75:25.8 MPR-T-5 manufactured by Shinkagakusha) - Pentaerythritol tetraacrylate-1-11CI - Michlers I) ton 0.1g・
Benzophenone 0.649, paramethoxyphenol 0.018 (tomethyl ethyl ketone 44 Q) The previously obtained yellow image was 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 for 5
K! The yellow color image was transferred onto the image-receiving layer by passing at a rate of 50C11/min under pressure conditions of 1/Cm'', 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. 50C with 4KW metal halide lamp on polyethylene terephthalate film surface
Full exposure was given for 30 seconds from a distance of I11, and then the polyethylene terephthalate film of the image receiving sheet was peeled off.

A multicolor blue ink 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 was different from that obtained by ordinary offset printing.

Example 2 A colored image forming material was prepared, exposed, developed, and image transferred in the same manner as in Example 1, except that the colored photosensitive composition dispersion was changed to one with the following composition, and four colors were printed on art paper. A color blue ink image was formed.

(Colored photosensitive composition dispersion) - 6 g of copolymer of benzyl methacrylate and methacrylic acid (molar ratio 7
3:27) Pentaerythritol tetraacrylate 4.3g Michler's ketone 0.04 (Topenzophenone 0.259 Paramethoxyphenol 0.0117 Methyl cellosolve 100g Fluorine surfactant 0.1g (manufactured by 3M, FC-4)
30) - Pigments (black, cyan, magenta, and yellow are the same as those used in Example 1) Only the colored image portion is transferred onto the art paper, that is, the non-image portion of the paper is exposed, and the resulting color The blue ink image closely resembled the image quality of prints produced by conventional offset printing.

Example 3 A dispersion of a colored photosensitive composition having the following composition was applied to the surface of a polypropylene layer of a support having a polypropylene layer of 0.1 μm thick on a polyethylene terephthalate film 1 to 75 μm thick, prepared by a coextrusion method. A dry film thickness of 1 μm 1. : Coated as shown in Figure 1 and dried to prepare four colored image forming materials.

(Photosensitive composition dispersion) - 12 g of alkali-soluble polymer composition solution used in Example-1 - Diazo resin (weight average molecular fi 1000) - Polyacrylic acid
0.3g (manufactured by Junkuwa Hiki, Julimar-AC1OL)・Methyl cellosolve
94g・Fluorine surfactant 0.1
g (manufactured by 3M Company, l=C-430) - Pigment (black, cyan, magenta, and yellow are the same as those used in Example 1) - Colored photosensitive layer surface of the four colored image forming materials obtained above A color separation network negative film of each color was superimposed on the film, image exposure was performed for 10 seconds from a distance of 50 cm using a 41〈W metal halide lamp, and development was performed by immersing the film in the developer used in Example 1 for 30 seconds. A colored image was formed.

Thereafter, the same image transfer process as in Example 1 was performed to form a color proofing m image consisting of four colors on art paper.

Only the colored image part is transferred onto the art paper, i.e.
The non-image areas of the paper were exposed and the resulting color proofing image closely resembled the image quality of prints produced by conventional offset printing.

[Effects of the Invention 1] As explained in detail above, according to the transfer image forming method of the present invention, by transferring only the image portion of the colored image onto the transfer material, a transfer image having a quality similar to that of a normal offset printing image can be obtained. can be formed.

Claims (1)

[Claims] By performing at least imagewise exposure and development treatment on a colored image-forming material having a colored photosensitive layer containing a colorant and a photosensitive composition that becomes insolubilized in a developer upon irradiation with actinic rays on a support. A method for forming a transfer image, which comprises transferring only the image area from the colored image formed on the support to a transfer material to obtain a transfer image.