JPH09281700A - Image forming material, its production and image forming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming material having good picture quality, wide latitude for peeling of a protective film so that the protective film can be smoothly peeled without any resistance, and to provide its production method. SOLUTION: This image forming material has a release layer, a color photosensitive layer and a protective film in this order on a transparent supporting body. In the image forming process on the image forming material, the protective film is peeled off the color photosensitive layer by <100g/50mm peeling force after exposure. The color photosensitive layer is adhered to a transfer medium by heating under pressure, then the transparent supporting body and the release layer are peeled off the color photosensitive layer by the peeling force between >100g/50mm and <2000g/50mm to obtain the image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming material suitable for producing a color proof in color printing, a method for producing the same, and an image forming method. The present invention relates to an image forming material having a wide latitude and capable of smoothly peeling a protective film without resistance, a manufacturing method thereof, and an image forming method.

[0002]

2. Description of the Related Art JP-A-7-89213 and 7-179.
No. 021, No. 7-179022, No. 7-179023
No. 7,257,008, and No. 7-257,097, a release layer, a colored photosensitive layer, and a protective film are provided in this order on a transparent support, and polyethylene terephthalate, polyethylene, polypropylene / The image forming material using a film such as polyethylene terephthalate is image-exposed to reduce the adhesiveness of the colored photosensitive layer in the exposed area, the protective film is peeled off, and the adhesive area in the unexposed area is transferred to the transfer medium. Disclosed are materials and methods for making color proofing sheets and printing plates.

JP-A-2-228664 and JP-A-63-
No. 147154, a transparent support is provided with a colored photosensitive layer and a protective film in this order, and an image forming material using a film of polyethylene terephthalate, polyethylene, polypropylene / polyethylene terephthalate or the like as the protective film is imagewise exposed. , A material and method for reducing the adhesiveness of the colored photosensitive layer in the exposed area, peeling off the protective film, and then transferring the adhesive area in the unexposed area to the transfer medium to create a color proofing sheet or a printing plate. It is disclosed. Further, JP-A-2-228664 discloses a production method in which a protective film of polyethylene subjected to electron beam treatment is coated with a colored photosensitive layer and then laminated on a support.

In any of the above techniques, unless careful attention is paid to the force applied to the peeling of the protective film and the peeling direction, a part of the colored photosensitive layer adheres to the protective film and is removed from the release layer, and finally In addition, there is a problem that a colored image has a defect.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an image forming material having a good image quality, a wide latitude for peeling a protective film, and capable of peeling a protective film smoothly without resistance, a method for producing the same, and an image forming method. To provide a method.

[0006]

The above-mentioned problems of the present invention are as follows. In an image forming material having a release layer, a colored photosensitive layer and a protective film in this order on a transparent support, the peeling force when peeling the protective film from the colored photosensitive layer is 100 g / 50.
an image-forming material characterized by being smaller than mm,

[0007] 2. After the colored photosensitive layer is adhered to the transfer medium by heating and pressing, the peeling force when peeling the transparent support and the release layer from the colored photosensitive layer is more than 100 g / 50 mm and less than 2000 g / 50 mm. 1. The image forming material as described in 1 above,

[0008] 3. In the method for producing an image forming material having a colored photosensitive layer on a transparent support and a protective film in this order, after coating the colored photosensitive layer on the transparent support, the side in contact with the colored photosensitive layer has a physical or chemical surface. A method for producing an image-forming material, which comprises laminating a protective film which has been treated on the surface of a colored photosensitive layer,

4. An image forming material having a colored photosensitive layer and a protective film on a transparent support in this order, wherein the colored photosensitive layer contains a lubricant and at least one compound having a long-chain alkyl group,

5. 5. The image-forming material as described in 4 above, wherein at least one kind of a lubricant and a compound having a long-chain alkyl group is localized on the surface of the colored photosensitive layer in contact with the protective layer.

6. The image-forming material as described in any one of 1, 3, and 4, wherein the colored photosensitive layer has a difference in adhesiveness between an exposed portion and a non-exposed portion due to imagewise exposure.

7. The viscosity of the colored photosensitive layer when heated is 10,000 to 1
The image forming material as described in any one of 1, 3, and 4, wherein a protective film is laminated at a heating temperature of 100,000 cps.

8. An image-forming material as described in any of the above 3, 4, or 5, wherein a release layer is interposed between the transparent support and the colored photosensitive layer.

9. On the transparent support, a release layer, a colored photosensitive layer,
When forming an image using the image forming material having the protective film in this order, the protective film is peeled off from the colored photosensitive layer after exposure with a peeling force of less than 100 g / 50 mm,
After adhering the colored photosensitive layer to the transfer medium under heat and pressure,
100 g / 50 of transparent support and release layer from the colored photosensitive layer
The image forming method is characterized in that an image is formed by peeling with a peeling force larger than 2000 mm and smaller than 2000 g / 50 mm.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.
In the present invention as set forth in claim 1, for example, as a constitution that enables peeling with a peeling force between the colored photosensitive layer and the protective film of less than 100 g / 50 mm, for example,
The means described in 4 or 5 can be mentioned. When the peeling force between the colored photosensitive layer and the protective film is 100 g / 50 mm or more, the colored photosensitive layer is easily peeled together when peeling the protective film, and an image defect occurs.

On the other hand, in the structure described in claim 2,
The peeling force between the colored photosensitive layer and the release layer is larger than 100 g / 50 mm and smaller than 2000 g / 50 mm. Techniques and techniques for selecting the composition of the colored photosensitive layer and the release layer can be cited. When the peeling force between the colored photosensitive layer and the release layer is 100 g / 50 mm or less, the colored photosensitive layer is peeled together when the protective film is peeled off, and an image defect occurs, and when it is 2000 g / 50 mm or more, after image transfer, When the support is peeled off, the support peels off a part of the image, resulting in a defect in the transferred image.

In the present invention as set forth in claim 3, examples of the physical and chemical surface treatment for the protective film include the following techniques. As the physical surface treatment, corona discharge treatment, flame treatment, ozone treatment, ultraviolet irradiation, ion beam irradiation, (active) plasma treatment, high frequency treatment, glow discharge treatment, laser treatment and the like can be used. The ion beam irradiation technology is described in Shigeo Shimizu, "Ion Beam Application Technology" (published by CMC in 1989), and the technology described above can be used in the present invention. Examples of ions to be injected into the protective film include argon ions, nitrogen ions, oxygen ions, fluorine ions, and sodium ions. As the chemical surface treatment, a chemical treatment, for example, a treatment with an alkali, an acid, an organic solvent, a plasma polymerization treatment, a treatment by a chemical vapor deposition method (CVD) or the like can be used.

The lubricant, the long-chain alkyl compound and the surface localization of the photosensitive layer used in the present invention as defined in claim 4 or 5 will be described below. The lubricant used in the present invention is selected in consideration of gelation rate, flow viscosity, transparency, releasability, adhesiveness, softening temperature, correlation peeling, etc., including prevention of friction between polymers. It is possible to use all of the aliphatic hydrocarbon lubricants, higher aliphatic alcohol / higher fatty acid lubricants, fatty acid amide lubricants, metal soap lubricants, fatty acid ester lubricants, complex lubricants and the like that have been used. Some specific examples are shown below, but usable examples are not limited to these.

Examples of these lubricants include liquid paraffin having C ₁₆ or more, microcrystalline, wax,
Natural paraffin, synthetic paraffin, polyolefin wax and partial oxides thereof, or fluoride, chloride, animal oil such as beef tallow and fish oil, coconut oil, soybean oil, rapeseed oil,
Higher aliphatic alcohols and higher fatty acids of C ₁₆ or higher separated and refined from vegetable oil such as rice bran wax, amide of higher fatty acid, bisamide, barium stearate, calcium stearate, zinc stearate, aluminum stearate, magnesium stearate, zinc stearate・ Barium stearate complex, zinc stearate / calcium stearate complex, higher fatty acid ester of monohydric alcohol, higher fatty acid (partial) ester of polyhydric alcohol, montan wax type very long chain ester or its partial hydrolysis It is a thing.

Of these lubricants, preferred are low molecular weight polyethylene, aliphatic hydrocarbon type, amide type, fluorinated resin and higher alcohol type lubricants. These lubricants may be used alone or in combination of two or more.

As long-chain alkyl compounds other than those described above, among substituted or unsubstituted carboxylic acid vinyl esters, alkyl having 7 or more carbon atoms, for example, vinyl caprylate, vinyl caprate, vinyl laurate. , Vinyl myristate, vinyl palmitate, vinyl stearate, vinyl versatate, or a substituted or unsubstituted alkyl acrylate or alkyl methacrylate having 8 or more carbon atoms, for example, octyl acrylate, nonyl acrylate, decyl acrylate, Polymers of undecyl acrylate, dodecyl acrylate, octyl methacrylate, nonyl methacrylate, decyl methacrylate, undecyl methacrylate, dodecyl methacrylate are used. The polymer may be a polymer obtained by polymerizing one type of carboxylic acid vinyl ester and / or an alkyl acrylate or an alkyl methacrylate, or a polymer obtained by copolymerizing two or more types. Further, it may be a copolymer of a carboxylic acid vinyl ester and / or an alkyl acrylate or an alkyl methacrylate and another monomer copolymerizable therewith, but a carboxylic acid vinyl ester and / or an alkyl acrylate or an alkyl methacrylate may be used. Weight ratio is 40
% Or more is preferable. Examples of the monomer unit that can be used in combination include the compounds shown below.

Ethylenically unsaturated olefins such as ethylene, propylene, isobutylene, butadiene and isoprene. Styrenes such as styrene, α-methylstyrene, p-methylstyrene and p-chlorostyrene. Acrylic acid,
Unsaturated carboxylic acids such as methacrylic acid, crotonic acid and isocrotonic acid. Unsaturated aliphatic dicarboxylic acids such as itaconic acid, maleic acid and maleic anhydride. Diesters of unsaturated dicarboxylic acids such as diethyl maleate, dibutyl maleate, di-2-ethylhexyl maleate, dibutyl fumarate and di-2-ethylhexyl fumarate. Methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, dodecyl acrylate, 2-chloroethyl acrylate, phenyl acrylate, α-
Α-Methylene aliphatic monocarboxylic acid esters such as methyl chloroacrylate, methyl methacrylate, and ethyl methacrylate. Nitriles such as acrylonitrile and methacrylonitrile. Amides such as acrylamide. Anilides such as acrylanilide, p-chloroacrylanilide, m-nitroacrylanilide, and m-methoxyacrylanilide. Vinyl ethers such as methyl vinyl ether, ethyl vinyl ether, isobutyl vinyl ether and β-chloroethyl vinyl ether. Vinyl derivatives such as vinyl chloride, vinylidene chloride and vinylidene cyanide. (12) 1-methyl-1-methoxyethylene, 1,1-
Dimethoxyethylene, 1,2-dimethoxyethylene,
1,1-dimethoxycarbonylethylene, 1-methyl-
Ethylene derivatives such as 1-nitroethylene. Vinyl monomers such as N-vinyl compounds such as N-vinylpyrrole, N-vinylcarbazole, N-vinylindole, N-vinylpyrrolidene and N-vinylpyrrolidone. Vinyl acetate,
Vinyl propionate, vinyl butyrate, vinyl pivalate,
Vinyl carboxylic acid ester monomers such as vinyl caproate.

The amount of the lubricant and long-chain alkyl compound used in the present invention is such that gelation rate, flow viscosity, transparency, releasability, adhesiveness, softening temperature, correlation peeling, etc. can be taken to prevent friction between polymers. In the present invention, the amount is preferably 0.001 to 10 parts with respect to 100 parts of the colored photosensitive layer, and particularly preferably 0.01 to 100 parts with respect to 100 parts of the colored photosensitive layer. The range is 5 parts.

The above compounds can be localized on the surface of the photosensitive layer by selecting a solvent for the colored photosensitive layer solution. Specifically, the boiling point is higher than that of the main solvent of the colored photosensitive layer, and it is possible to use a lubricant and a poor solvent of a long-chain alkyl compound in an amount of 1 to 50%, preferably 5 to 30%.

In the present invention as set forth in claim 6, the constitution of the colored photosensitive layer which causes a difference in tackiness between the exposed portion and the non-exposed portion upon imagewise exposure will be described in detail in the description of the photosensitive composition. I will describe.

In the present invention as set forth in claim 7, the viscosity of the colored photosensitive layer upon heating is measured by using a rheometer. When the viscosity is less than 10,000 cps, the uniformity of the film thickness of the colored photosensitive layer deteriorates, and, for example, the color density of the transferred image tends to be nonuniform. On the other hand, when it is more than 100,000 cps, the adhesion between the protective film and the colored photosensitive layer is non-uniform and the photosensitivity of that portion is deteriorated, so that, for example, stains occur on the non-image portion of the transferred image.

In the image-forming material of the present invention, an image-forming material having a photosensitive composition or the like is subjected to imagewise exposure to form an image portion and a non-image portion having different tackiness, and the image portion having high tackiness is finally made. The transfer image is obtained by transferring the image onto a support (for example, actual printing paper).

When the image forming material of the present invention is embodied as a multicolor image forming method, the basic method is as follows. In the case of the direct transfer method, the first color adhesive coloring image is formed on the first color coloring image forming material, the coloring image is transferred onto the final support, and the support is peeled off. Also, after the second color adhesive coloring image is formed on the second color coloring image forming material, the second color registration mark image formed with this is registered with the first color registration mark image of the final support. ,
The second colored adhesive colored image is transferred onto the first colored image and the support is peeled off to obtain an image in which the two colors are aligned. Similarly, the third and fourth color adhesive colored images are transferred onto the final support to obtain a multicolor image.

In the image forming material of the present invention, the image forming material is usually imagewise exposed through a color separation mask or the like to form an adhesive image. At this time, only the adhesive image portion formed on the support is directly or indirectly transferred and laminated on the final support. In this case, a release layer is provided on the surface of the support in order to efficiently perform transfer to the final support, facilitate peeling of the support after image transfer, and firmly leave the non-image in the release layer. ing. (In the present invention according to claims 3, 4, and 5, the release layer is basically unnecessary, but it may be provided).

The image-forming material of the present invention is usually imagewise exposed through a color separation mask or the like and then developed to form an image. At this time, a mode is adopted in which only the image portion is directly transferred and laminated on the material to be transferred from the image obtained on the support. That is, only the colored image layer that substantially forms an image is transferred and laminated. In this case, the cushion layer according to the present invention is provided on the support in order to efficiently perform the transfer onto the transfer surface and facilitate the peeling of the support after the image transfer. The thickness of the cushion layer is in the range of 15 to 100 μm, preferably 20 to 50 μm. Typical cushion materials used for the cushion layer include natural rubber and the following materials.

Thermoplastic rubber, Kraton G (G16
52, G1650, etc.) [made by Shell Chemical Co.] thermoplastic rubber, Cariflex TR (TR118)
4, TR1150, TR4122, etc.) (Shell Chemical Co.) ethylene-ethyl acrylate copolymer resin (EVAFL)
EX-EEA) [Mitsui DuPont Polychemical Co., Ltd.] Polybutadiene rubber styrene-butadiene copolymer Acrylonitrile-butadiene copolymer Polyisoprene rubber resin Styrene-isoprene copolymer Acrylic ester copolymer Polyurethane copolymer condensation rubber or It is also possible to put a foaming agent on the surface of the support and provide a cushioning property by foaming it by heating, light irradiation or the like to give a cushioning property to the surface part (upper part) of the support.

The method of manufacturing the cushion layer is not limited,
Generally, it is manufactured by coating. It is also effective to provide an anchor layer to increase the adhesive strength. As the anchor agent, vinyl acetate-based polymer, polyvinyl-based polymer, polyester-based polymer, polyurethane-based polymer, polyvinyl alkyl ether polymer, etc., and if necessary, it is also effective to add an isocyanate compound or an epoxy compound as a crosslinking agent. is there.

In addition to the above, the cushion layer may be blended with another resin within a range not impairing the effects of the present invention.
The blended resin has a softening point of -30 ° C to 150 ° C.
Are preferred. The softening point temperature here is VICA
The T softening point or the value indicated by the ring and ball method. In the present invention,
Specifically, the following may be mentioned as preferable resins.

Polyolefins such as polyethylene and polypropylene. Ethylene copolymers such as ethylene and vinyl acetate, ethylene and acrylate, and ethylene and acrylic acid. PVC. Vinyl chloride copolymers such as vinyl chloride and vinyl acetate. Polyvinylidene chloride. Vinylidene chloride copolymer. polystyrene. Styrene and styrene copolymers such as maleic anhydride. Polyacrylic ester. Polyester resin. Polyurethane resin. Acrylate and acrylate copolymers such as vinyl acetate. Polymethacrylic acid ester. Methacrylate copolymers such as methyl methacrylate and vinyl acetate, and methyl methacrylate and acrylic acid. Polyvinyl acetate. Vinyl acetate copolymer. Vinyl butyral resin. Polyamide resins such as nylon, copolymerized nylon and N-alkoxymethylated nylon. Petroleum resin. Chlorinated rubber. Polyethylene glycol. Polyvinyl alcohol hydro phthalate cellulose derivative, cellulose acetate phthalate, cellulose acetate succinate. Shellac. wax.

A method of blending a compound having a reactive group or a photosensitive group with a matrix resin is described, for example, in JP-A-4-147261, page 2, lower left column, No. 19.
A photopolymerizable composition containing an ethylenically unsaturated compound having a polymerizable unsaturated group, a photopolymerization initiator, and a binder, described in line to page 4, lower right column, line 10 can be applied. .

The support used in the image-forming material of the present invention may be made of any material, but a polyester film, particularly a biaxially stretched polyethylene terephthalate film, has a high strength.
It is preferable in terms of dimensional stability against water and heat and economical efficiency.
In addition, an acetate film, a polyvinyl chloride film, a polyethylene film, a polypropylene film or the like can be used. The thickness is not particularly limited, but from the viewpoint of workability, economy, etc., when it is used as a support, it is preferably about 50 to 150 μm.

In the image forming layer of the image forming material of the present invention, that is, the colored photosensitive layer, a photosensitive composition having a sensitivity to actinic rays can be used. The structure may be a one-layer structure or a multilayer structure of two or more layers. In the case of a multilayer structure, at least one or more layers may have an image forming ability. Colorants such as dyes can be included.

In the present invention, regardless of the presence or absence of the release layer,
The following techniques can be mentioned as a method for producing a difference in the tackiness of the colored photosensitive layer upon exposure. That is, the method described below is a technique that can be applied regardless of the presence or absence of a release layer. As the photosensitive composition used for the colored photosensitive layer in the invention, a known photosensitive composition whose adhesiveness is changed by exposure can be used, but a photosensitive composition whose adhesiveness is lowered by exposure is preferable. Photopolymerizable photosensitive compositions are more preferred. Specifically, for example, as the photopolymerizable compound, any of those generally used can be arbitrarily used. For example, at least one compound arbitrarily selected from the compound group consisting of acrylic acid, methacrylic acid, acrylic acid ester and methacrylic acid ester can be used. For example, ethylene glycol diacrylate,
Glycerin triacrylate, polyacrylate, ethylene glycol dimethacrylate, 1,3-propanediol dimethacrylate, 1,2,4-butanetriol trimethacrylate, polyethylene glycol dimethacrylate, trimethylolethane triacrylate, pentaerythritol dimethacrylate, penta Erythritol trimethacrylate, pentaerythritol tetramethacrylate, pentaerythritol diacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol polyacrylate, 1,3-propanediol diacrylate, 1,5-pentanediol dimethacrylate, polyethylene glycol Bisacrylate or bismethacrylate It can be exemplified bets like, but not limited thereto.

A photopolymerization initiator may be contained in the photosensitive composition whose adhesiveness is reduced by exposure. The photopolymerization initiator in this case is optional, and examples of such a photopolymerization initiator include the following compounds. However, it is not limited to these. That is, benzophenone, Michler's ketone [4 ', 4'-bis (dimethylamino) benzophenone], 4,4'-bis (diethylamino) benzophenone, 4-methoxy-4'-dimethylaminobenzophenone, 2-ethylanthraquinone, phenanthra Aromatic ketones such as quinone and other aromatic ketones, benzoin, benzoin methyl ether, benzoin ethers such as benzoin ethyl ether and benzoin phenyl ether, methylbenzoin, ethylbenzoin and other benzoins, and 2-
(O-Chlorophenyl) -4,5-diphenylimidazole duplex, 2- (o-chlorophenyl) -4,5-
(M-Methoxyphenyl) imidazole duplex, 2-
(O-Fluorophenyl) -4,5-diphenylimidazole double body, 2- (o-methoxyphenyl) -4,5
-Diphenylimidazole duplex, 2- (p-methoxyphenyl) -4,5-diphenylimidazole duplex,
2,4-di (p-methoxyphenyl) -5-phenylimidazole double body, 2- (2,4-dimethoxyphenyl) -4,5-diphenylimidazole double body, 2-
(P-Methylmercaptophenyl) -4,5-diphenylimidazole duplex and U.S. Pat. No. 3,479,18.
5, British Patent 1,047,569 and US Patent 3,
Mention may be made of the 2,4,5-triacryluimidizole duplex, such as the similar duplexes described in the respective specifications of 784,557.

As other photopolymerizable initiators, 2,4-
Thioxanthones such as diethylthioxanthone can also be used. In this case, known compounds such as p-dimethylaminobenzoic acid isoamyl ester, p-dimethylaminobenzoic acid ethyl ester, N-methyldiethanolamine, and bisdiethylaminobenzophenone can be used as the photopolymerization accelerator.

Next, in the present invention, the photosensitive composition may contain a known polymer compound or synthetic resin, and a polymer having a carboxylic acid vinyl ester polymerization unit represented by the following general formula in its molecular structure. It is preferable to contain a compound.

[0042]

Embedded image

However, R represents an alkyl group, and also includes an alkyl group having a substituent. Any polymer compound having the structure as described above can be used arbitrarily, but as the carboxylic acid vinyl ester monomer for constituting the polymerized unit represented by the above general formula, the following examples are preferable. The name and chemical formula are shown together.

1 vinyl acetate CH ₃ COOCH = CH ₂ 2 vinyl propionate CH ₃ CH ₂ COOCH =
CH ₂ 3 vinyl butyrate CH ₃ (CH ₂ ) ₂ COOCH = C
H ₂ 4 vinyl pivalate (CH ₃ ) ₃ CCOOCH =
CH ₂ 5 vinyl caproate CH ₃ (CH ₂ ) ₄ COOC
H = CH ₂ 6 vinyl caprylate CH ₃ (CH ₂ ) ₆ COOC
H = CH ₂ 7 vinyl caprate CH ₃ (CH ₂ ) ₈ COOC
H = CH ₂ 8 vinyl laurate CH ₃ (CH ₂ ) ₁₀ COO
CH = CH ₂ 9 vinyl myristate CH ₃ (CH ₂ ) ₁₂ CO
OCH = CH ₂ 10 vinyl palmitate CH ₃ (CH ₂ ) ₁₄ C
OOCH = CH ₂ 11 vinyl stearate CH ₃ (CH ₂ ) ₁₆ C
OOCH = CH ₂ 12 Versatic vinylate

[0045]

Embedded image

(R ¹ and R ² are alkyl groups and the sum of the carbon atoms thereof is 7. That is, R ¹ + R ² = C ₇ H ₁₆ is obtained.) The polymer compound is a carboxylic acid vinyl ester of 1 The polymer may be a polymer obtained by polymerizing a seed, or a polymer obtained by copolymerizing two or more kinds of carboxylic acid vinyl ester, and may be any component ratio of the carboxylic acid vinyl ester and another monomer copolymerizable therewith. May be a copolymer of

Examples of the monomer unit which can be used in combination with the polymer unit represented by the above general formula include ethylenically unsaturated olefins such as ethylene, propylene, isobutylene, butadiene and isoprene, for example, styrene and α-methyl. Styrene, p-methylstyrene, p-
Styrenes such as chlorostyrene, acrylic acids such as acrylic acid and methacrylic acid, for example itaconic acid, maleic acid, unsaturated aliphatic dicarboxylic acids such as maleic anhydride, such as diethyl maleate, dibutyl maleate,
Diesters of unsaturated dicarboxylic acids such as di-2-ethylhexyl maleate, dibutyl fumarate, di-2-ethylhexyl fumarate, for example, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, acrylic acid Phenyl, α-methyl methyl acrylate, methyl methacrylate, α-methylene aliphatic monocarboxylic acid esters such as ethyl methacrylate, for example, acrylonitrile, nitriles such as methacrylonitrile, for example, amides such as acrylamide, for example, acrylanilide Anilides such as p-chloroacrylanilide, m-nitroacrylanilide and m-methoxyacrylanilide, for example, methyl vinyl ether, ethyl vinyl ether, isobutyl vinyl ether, β-chloroethyl vinyl ether Vinyl ethers, vinyl chloride, vinylidene chloride, vinylidene cyanide, such as 1-methyl-1-methoxyethylene, 1,1-dimethoxyethylene, 1,2-ethylene, 1,1
Ethylene derivatives such as dimethoxycarbonylethylene and 1-methyl-1-nitroethylene, for example, N-vinyl such as N-vinylpyrrole, N-vinylcarbazole, N-vinylindole, N-vinylpyrrolidene and N-vinylpyrrolidone There are vinyl monomers such as compounds. These monomer units have a structure in which the unsaturated double bond is cleaved and are present in the polymer compound.

Particularly preferred as the polymer compound used in the present invention is one having a vinyl acetate polymer unit in the molecular structure. Among them, those having 40 to 95% by weight of vinyl acetate polymerized units, number average molecular weight (MN)
However, those having a weight average molecular weight (MW) of 500 to 150,000 are preferred.

More preferably, a polymer compound having a vinyl acetate polymer unit (particularly one having 40 to 95% by weight) and a carboxylic acid vinyl ester polymer unit having a longer chain than vinyl acetate is preferable, and particularly a number average molecular weight (MN). Is 2,000
0-60,000, weight average molecular weight (MW) of 10,000
It is preferably from 00 to 150,000.

In this case, the monomer constituting the polymer compound having vinyl acetate polymerized units by copolymerization with vinyl acetate may be any monomer as long as it can form a copolymer. You can choose it from your body.

The copolymers that can be used as the polymer compound in the present invention are listed below by showing the monomer components. However, as a matter of course, the present invention is not limited to the following example.

1 vinyl acetate-ethylene 2 vinyl acetate-styrene 3 vinyl acetate-crotonic acid 4 vinyl acetate-maleic acid 5 vinyl acetate-2-ethylhexyl acrylate 6 vinyl acetate-di-2-ethylhexyl maleate 7 vinyl acetate-methyl vinyl ether 8 Vinyl Acetate-Vinyl Chloride 9 Vinyl Acetate-N-Vinyl Pyrrolidone 10 Vinyl Acetate-Vinyl Propionate 11 Vinyl Acetate-Vinyl Pivalate 12 Vinyl Acetate-Varsatic Acid Vinyl 13 Vinyl Acetate-Vinyl Laurate 14 Vinyl Acetate-Vinyl Stearate 15 Vinyl acetate-vinyl versatate-ethylene 16 Vinyl acetate-vinyl versatate-2-ethylhexyl acrylate 17 Vinyl acetate-vinyl versatate-vinyl laurate 18 Vinyl acetate-bar Vinyl tic acid - crotonic acid 19 vinyl propionate - vinyl versatate 20 vinyl propionate - vinyl versatate - crotonic acid 21 pivalate - vinyl stearate - maleic acid

In the present invention, for example, when used as a color proof, an image forming layer of a colored image forming material,
That is, the colored photosensitive layer changes in imagewise adhesiveness by imagewise exposure to form a colored image portion.

Dyes and / or pigments are added as colorants in the colored photosensitive layer. In particular, when used for color proofing, pigments and dyes having the same color as the required ordinary colors, that is, yellow, magenta, cyan, and black are required, but other metal powders, white pigments, and fluorescent pigments are required. Also used. When applying the present invention to a color proof, many pigments and dyes known in the art can be used, as described below.

(C.I means color index). Victoria Pure Blue (CI 42595) Auramine (CI 41000) Katilon Brilliant Flavin (CI Basic 1)
3) Rhodamine 6GCP (CI 45160) Rhodamine B (CI 45170) Safranine OK 70: 100 (CI 50240) Erioglaucin X (CI 42080) Fast Black HB (CI 26150) No. 1201 Lionol Yellow (CI 2109
0) Lionol Yellow GRO (CI 21090) Shimla First Yellow 8GF (CI 2110
5) Benzidine Yellow 4T-564D (CI 2109)
5) Shimla Fast Red 4015 (CI 1235)
5) Lionol Red 7B4401 (CI 15830) Fastgen Blue TGR-L (CI 7416)
0) Lionol Blue SM (CI 26150) Mitsubishi Carbon Black MA-100 Mitsubishi Carbon Black # 30, # 40, # 50

When a colorant is used in the present invention, the ratio of the colorant / a component other than the colorant in the colored photosensitive layer can be determined by those skilled in the art in consideration of the target optical density and the image-like tackiness of the colored photosensitive layer. It can be determined by a known method. For example,
In the case of dyes, the content is preferably 5% to 75% by weight.
%, In the case of pigments, the content is preferably 5% by weight.
90% is suitable.

The thickness of the colored photosensitive layer is determined by a method known to those skilled in the art according to the target optical density, the kind of the coloring agent used in the colored photosensitive layer (dye, pigment, carbon black) and its content. but it is, preferably typically the is used in the range of ^{0.1g / m 2 ~5g / m 2} .

In carrying out the present invention, a plasticizer, a coatability improving agent and the like may be further added to the photosensitive composition, if necessary. Examples of the plasticizer include various low molecular compounds such as phthalates, triphenyl phosphates and maleates, and examples of the coating improver include surfactants such as a fluorine-based surfactant and ethyl cellulose polyalkylene ether. Nonionic activators and the like.

The image forming material of the present invention has a protective film. As the protective film, any known film can be used. Specifically, polyvinyl alcohol, celluloses, polyethylene terephthalate, etc. can be used. However, the gas permeability is appropriately selected according to the type of the image forming layer to be used. That is, when a material such as a photopolymerizable photosensitive composition whose image formation is hindered by oxygen in the air during exposure is used for the image forming layer, a protective film having low gas permeability may be provided. preferable.

[0060]

EXAMPLES Examples of the present invention will be illustrated below together with comparative examples. However, the present invention is not limited by the examples described below.

Example 1 A release layer coating solution having the following composition was applied on a polyethylene terephthalate film having a thickness of 75 μm so that the dry film thickness was 30 μm, to form a release layer. Next, a solution for a colored photosensitive layer having the following composition was applied on the release layer so as to have a dry film thickness of 3 μm. On the dried colored photosensitive layer, a protective film made of polyethylene 15 μm / polyethylene terephthalate 15 μm was laminated and a cover sheet was provided to obtain an image forming material sample.

Next, the transparent support side of this image forming material sample and the plate control wedge (PCW, manufactured by UGRA) were brought into close contact with each other, and a UV printer, HMW-201KB was used.
After imagewise exposure with (Oak Seisakusho Co., Ltd.), the image forming material sample and the plate control wedge were peeled off, and an art paper was prepared using a first laminator 8b-700 special type (Taisei Laminator Co., Ltd.), The cover sheet is peeled off and the image forming material sample is brought into close contact with it, and the pressure is 4 k
When a transfer was performed by a nip between the rollers under the conditions of g / cm ² , a passing speed of 35 cm / min, and a roller surface temperature of 80 ° C., a cyan transfer image was obtained on the art paper. The quality of the obtained image (see the evaluation criteria below) and the peelability / latitude of the protective film were evaluated. The results are shown in Table 1.

The peeling force when peeling the protective film from the colored photosensitive layer (hereinafter referred to simply as the protective film peeling force), the peeling force when peeling the support and the release layer from the colored photosensitive layer (hereinafter The support peeling force) is as shown in Table 1.

Coating liquid for release layer 30% toluene solution of styrene-ethylene-butadiene-styrene block polymer (G1650, Shell Chemical Co.)

Solution for Colored Photosensitive Layer (Cyan) Vinyl acetate-vinyl versatate copolymer (70 parts by weight / 30 parts by weight) 5.5 g Dipentaerythritol hexaacrylate 2.5 g Michler's ketone 0.4 g 2-Ethylanthraquinone 4g Lionol Blue FG7330 (manufactured by Toyo Ink Co., Ltd.) 0.8g Methyl ethyl ketone 100g

Evaluation of image quality 5: There is no visually observable image defect (image part missing, non-image part stain) 4: No visually observable image defect (image part missing, non-image part stain) , Several defects that can be confirmed with a magnifying power of 100 / m ² 3: Image defects that can be visually confirmed (spots in the image area and non-image area stains) / m ² 2: Image defects that can be visually confirmed ( image of the missing, non-image portion dirt) is dozens / m 2 ^1: image defects can be confirmed visually (image portion of the missing, non-image portion dirt) is several hundred / m ²

Comparative Example 1 The quality and protection of the image obtained in the same manner as in Example 1 except that the protective film of Example 1 was replaced by polyethylene terephthalate 30 μm and the peeling force of the protective film was changed to the conditions shown in Table 1. The peelability and latitude of the film were evaluated. The results are shown in Table 1.

Example 2 The colored photosensitive layer solution of Example 1 was replaced with a colored photosensitive layer solution having the following composition, and the protective film peeling force / support peeling force / viscosity of the colored photosensitive layer upon heating (hereinafter referred to as the colored photosensitive layer An image forming material sample was obtained by the same method as in Example 1 except that the layer viscosity was changed to the conditions shown in Table 1, and a cyan transfer image was obtained by the same method as in Example 1. The quality of the obtained image and the peelability / latitude of the protective film were evaluated. The results are shown in Table 1.

Solution for Colored Photosensitive Layer (Cyan) Vinyl acetate-vinyl versatate copolymer (70 parts by weight / 30 parts by weight) 5.0 g Pentaerythritol triacrylate 3.0 g Michler's ketone 0.4 g 2-Ethylanthraquinone 0.4 g Lionol Blue FG7330 (manufactured by Toyo Ink Co., Ltd.) 0.8 g Methyl ethyl ketone 100 g

Comparative Example 2 An image obtained in the same manner as in Example 2 except that the protective film of Example 2 was changed to polypropylene 15 μm / polyethylene terephthalate 15 μm and the protective film peeling force was changed to the conditions shown in Table 1. And the peelability and latitude of the protective film were evaluated. The results are shown in Table 1.

Example 3 The colored photosensitive layer solution of Example 1 was replaced with the colored photosensitive layer solution having the following composition, the protective film was replaced with Si-treated 0.7 μm / polyethylene terephthalate 30 μm, and the protective film peeling force / support was used. Four color image forming material samples of yellow, magenta, cyan and black were obtained in the same manner as in Example 1 except that the peeling force and the viscosity of the colored photosensitive layer were changed to those shown in Table 1. A four-color transfer image was obtained by transferring in the same manner as in Example 1. The quality of the obtained image and the peelability / latitude of the protective film were evaluated. The results are shown in Table 1.

Solution for Colored Photosensitive Layer (Yellow) Vinyl acetate-vinyl versatic acid copolymer (80 parts by weight / 20 parts by weight) 4.0 g Pentaerythritol triacrylate 4.0 g Michler's ketone 0.4 g 2-ethylanthraquinone 0.4 g Lionol Yellow FG30 (manufactured by Toyo Ink Co., Ltd.) 0.8 g Methyl ethyl ketone 100 g

Solution for Colored Photosensitive Layer (Magenta) Vinyl acetate-vinyl versatic acid copolymer (80 parts by weight / 20 parts by weight) 4.0 g Pentaerythritol triacrylate 4.0 g Michler's ketone 0.4 g 2-Ethylanthraquinone 0.4 g Lionol Red 7 BFG4412 (manufactured by Toyo Ink Co., Ltd.) 0.8 g Methyl ethyl ketone 100 g

Solution for Colored Photosensitive Layer (Cyan) Vinyl acetate-vinyl versatate copolymer (80 parts by weight / 20 parts by weight) 4.0 g Pentaerythritol triacrylate 4.0 g Michler's ketone 0.4 g 2-ethylanthraquinone 0.4 g Lionol Blue FG7330 (manufactured by Toyo Ink Co., Ltd.) 0.8 g Methyl ethyl ketone 100 g

Solution for Coloring Photosensitive Layer (Black) Vinyl acetate-vinyl versatate copolymer (80 parts by weight / 20 parts by weight) 4.0 g Pentaerythritol triacrylate 4.0 g Michler's ketone 0.4 g 2-Ethylanthraquinone 0.4 g Mitsubishi Carbon MA7 (manufactured by Mitsubishi Chemical Corporation) 0.8 g Methyl ethyl ketone 100 g

Comparative Example 3 Image quality and protective film obtained in the same manner as in Example 3 except that the protective film of Example 3 was replaced with polyethylene of 30 μm and the protective film peeling force was changed to the conditions shown in Table 1. Was evaluated for releasability and latitude. The results are shown in Table 1.

Example 4 An image forming material sample was obtained by the same method as in Example 2 except that the viscosity of the colored photosensitive layer was changed, and a cyan transfer image was obtained by the same method as in Example 1. The quality of the obtained image and the peelability / latitude of the protective film were evaluated.
The results are shown in Table 1.

Comparative Example 4 The quality and protection of the image obtained were the same as in Example 4 except that the protective film of Example 4 was replaced with polyethylene terephthalate 30 μm and the peeling force of the protective film was changed to the conditions shown in Table 1. The peelability and latitude of the film were evaluated. The results are shown in Table 1.

Example 5 Example 1 was repeated except that the colored photosensitive layer solution of Example 1 was replaced with the colored photosensitive layer solution having the following composition, and the support peeling force and the colored photosensitive layer viscosity were changed to the conditions shown in Table 1. An image forming material sample was obtained by the same method as in Example 1 and a cyan transfer image was obtained by the same method as in Example 1. The quality of the obtained image and the peelability / latitude of the protective film were evaluated. The results are shown in Table 1.

Solution for Colored Photosensitive Layer (Cyan) Vinyl acetate-vinyl versatate copolymer (80 parts by weight / 20 parts by weight) 3.5 g Dipentaerythritol hexaacrylate 4.5 g Michler's ketone 0.4 g 2-ethylanthraquinone 4g Lionol Blue FG7330 (manufactured by Toyo Ink Co., Ltd.) 0.8g Methyl ethyl ketone 100g

Comparative Example 5 The same procedure as in Example 5 was carried out except that the protective film of Example 5 was replaced by polyethylene terephthalate 30 μm, and the protective film peeling force / colored photosensitive layer viscosity was changed to the conditions shown in Table 1. The image quality and the peelability / latitude of the protective film were evaluated. The results are shown in Table 1.

Example 6 An image forming material sample was obtained in the same manner as in Example 5 except that the viscosity of the colored photosensitive layer in Example 5 was changed to the conditions shown in Table 1.
A cyan transfer image was obtained by the same method as in Example 1. The quality of the obtained image and the peelability / latitude of the protective film were evaluated. The results are shown in Table 1.

Comparative Example 6 An image obtained in exactly the same manner as in Example 5 except that the protective film of Example 5 was changed to polypropylene 15 μm / polyethylene terephthalate 15 μm and the protective film peeling force was changed to the conditions shown in Table 1. And the peelability and latitude of the protective film were evaluated. The results are shown in Table 1.

Example 7 After the same image forming material sample as in Example 2 was obtained, an electrolytically sanded aluminum plate having a center line average roughness of 0.3 μm was used in place of the art paper of Example 1. Is Example 1
A printing plate in which a cyan transfer image was transferred onto an aluminum plate was obtained by the same method as described above. The obtained printing plate was printed using a Heidelberg GTO printing machine to obtain a printed matter.
The image quality of the obtained printed matter and the peelability / latitude of the protective film were evaluated. The results are shown in Table 1.

Comparative Example 7 Printed matter obtained in exactly the same manner as in Example 7 except that the protective film of Example 7 was changed to polypropylene 15 μm / polyethylene terephthalate 15 μm and the protective film peeling force was changed to the conditions shown in Table 1. The image quality and the peelability / latitude of the protective film were evaluated. The results are shown in Table 1.

[0086]

[Table 1]

In Table 1, the peeling force was measured by using a Tensilon tensile tester so that the colored photosensitive layer was flat, and the protective film and the surface of the colored photosensitive layer, and the support, the release layer and the colored photosensitive layer were used. The 180 ° peeling force from the layer surface was measured (peeling speed 40 mm / min, peeling sample width 50 mm).

The structure of the protective film is as follows. PE / PET: polyethylene 15 μm / polyethylene terephthalate 15 μm PET: polyethylene terephthalate 30 μm PE: polyethylene 30 μm PP / PET: polypropylene 15 μm / polyethylene terephthalate 15 μm Si-treated PET: Si treatment 0.7 μm / polyethylene terephthalate 15 μm For Si treatment, hydroxyl groups at both ends Polyorganosiloxone and silane coupling agent are dissolved in solvent and PET
A cross-linked silicone resin which has been applied to a film such as the above and dried, is preferably used.

Example 8 Example 1 was repeated except that the protective film of Example 3 was replaced with corona-treated polyethylene 15 μm / polyethylene terephthalate 15 μm on the side in contact with the colored photosensitive layer, and the colored photosensitive layer viscosity was changed to the conditions shown in Table 2. Four color image forming material samples of yellow, magenta, cyan and black were obtained by the same method as described above, and the four color samples were sequentially transferred by the same method as in Example 1 to obtain a four color transfer image. The quality of the obtained image and the peelability / latitude of the protective film were evaluated. Table 2 shows the results.

Example 9 Regarding the quality of the obtained image and the releasability / latitude of the protective film in the same manner as in Example 8 except that the viscosity of the colored photosensitive layer of the protective film of Example 8 was changed to the conditions shown in Table 2. evaluated. Table 2 shows the results.

Example 10 The quality of the obtained image and the releasability / latitude of the protective film were evaluated in the same manner as in Example 8 except that the treatment of the protective film of Example 8 was carried out under the conditions shown in Table 2. Table 2 shows the results.

Example 11 The quality of the obtained image and the releasability / latitude of the protective film were evaluated in the same manner as in Example 9 except that the treatment of the protective film of Example 9 was carried out under the conditions shown in Table 2. Table 2 shows the results.

Example 12 A solution for a colored photosensitive layer having the following composition was coated on a protective film of polyethylene terephthalate of 30 μm so that the dry film thickness was 3 μm. Next, a 75 μm thick polyethylene terephthalate film was laminated on the surface of the colored photosensitive layer to obtain an image forming material sample, and a cyan transfer image was obtained by the same method as in Example 1. The quality of the obtained image and the peelability / latitude of the protective film were evaluated. The results are shown in Table 1. The viscosity of the colored photosensitive layer is as shown in Table 2.

Solution for colored photosensitive layer (cyan) Vinyl stearate-vinyl acetate copolymer (70 parts by weight / 30 parts by weight) 2.5 g Vinyl acetate-vinyl versatate copolymer (80 parts by weight / 20 parts by weight) 4.0 g Pentaerythritol triacrylate 4.0 g Michler's ketone 0.4 g 2-Ethylanthraquinone 0.4 g Rionol Blue FG7330 (manufactured by Toyo Ink Co., Ltd.) 0.8 g Methylethylketone 50 g Xylene 50 g

Example 13 The solution for colored photosensitive layer of Example 12 was replaced with a solution for colored photosensitive layer having the following composition, and a vinyl stearate-vinyl acetate copolymer (70 parts by weight / 30 parts by weight) in the colored photosensitive layer was used. Was obtained in the same manner as in Example 12 except that was localized on the surface in contact with the protective layer, the quality of the obtained image and the peelability of the protective film.
The latitude was evaluated. Table 2 shows the results.

Solution for Colored Photosensitive Layer (Cyan) Vinyl stearate-vinyl acetate copolymer (70 parts by weight / 30 parts by weight) 2.5 g Vinyl acetate-vinyl versatate copolymer (80 parts by weight / 20 parts by weight) 4.0 g Pentaerythritol triacrylate 4.0 g Michler's ketone 0.4 g 2-Ethylanthraquinone 0.4 g Rionol blue FG7330 (manufactured by Toyo Ink Co., Ltd.) 0.8 g Ethylene glycol monomethyl ether 20 g Methyl ethyl ketone 30 g Xylene 50 g

Example 14 The quality of the obtained image and the releasability / latitude of the protective film were evaluated in the same manner as in Example 13 except that the viscosity of the colored photosensitive layer was changed as shown in Table 2. Table 2 shows the results.

Comparative Example 8 Except that the colored photosensitive layer solution of Example 12 was replaced with the colored photosensitive layer solution having the following composition, and the protective film was replaced with corona-treated polyethylene 15 μm / polyethylene terephthalate 15 μm on the side in contact with the colored photosensitive layer. In the same manner as in Example 12, the quality of the obtained image and the peelability / latitude of the protective film were evaluated. Table 2 shows the results.

Solution for Colored Photosensitive Layer (Cyan) Vinyl acetate-vinyl versatate copolymer (80 parts by weight / 20 parts by weight) 4.0 g Pentaerythritol triacrylate 4.0 g Michler's ketone 0.4 g 2-Ethylanthraquinone 0.4 g Lionol Blue FG7330 (manufactured by Toyo Ink Co., Ltd.) 0.8 g Methyl ethyl ketone 100 g

Comparative Example 9 The quality of the obtained image and the releasability / latitude of the protective film were evaluated in the same manner as in Comparative Example 8 except that the treatment of the protective film of Comparative Example 8 was carried out under the conditions shown in Table 2. Table 2 shows the results.

Comparative Example 10 The quality of the image obtained and the releasability of the protective film were the same as in Example 12 except that the colored photosensitive layer solution of Example 12 was replaced with the colored photosensitive layer solution of the following composition. The latitude was evaluated. Table 2 shows the results.

Solution for Colored Photosensitive Layer (Cyan) Vinyl acetate-vinyl versatic acid copolymer (80 parts by weight / 20 parts by weight) 4.0 g Pentaerythritol triacrylate 4.0 g Michler's ketone 0.4 g 2-ethylanthraquinone 0.4 g Lionol Blue FG7330 (manufactured by Toyo Ink Co., Ltd.) 0.8 g Methyl ethyl ketone 100 g

Comparative Example 11 The side of the protective film of Comparative Example 10 in contact with the colored photosensitive layer was S.
In the same manner as in Comparative Example 10 except that the i-treated one was used, the quality of the obtained image and the peelability / latitude of the protective film were evaluated. Table 2 shows the results.

Example 15 The quality of images obtained in the same manner as in Example 3 except that the viscosity of the colored photosensitive layer was changed to the conditions shown in Table 2, and the peelability and latitude of the protective film were evaluated. Table 2 shows the results.

[0105]

[Table 2]

The surface treatment of the protective film is as shown below. Corona treatment: A high frequency and high voltage are applied between an insulated electrode and a grounded dielectric roll to cause air breakdown and ionization of air to generate corona discharge. The film surface is treated as the film passes through this corona discharge. EB treatment: The treatment described in the physical and chemical surface treatment of the protective film, specifically, using an ion implantation device (200 keV), N ₂ is implanted (implantation amount: 1 × 10 ¹⁶ ions / cm 2). ) Do. Si treatment: The same as in Table 1 above.

In the method of laminating the protective film, the term "laminate on the colored photosensitive layer" means that a release layer is coated on the support and the surface of the colored photosensitive layer is coated on the release layer to protect the colored photosensitive layer. It means to laminate a film, and laminating to a support means to coat a protective film with a colored photosensitive layer and then laminate the protective film to a support.

In the compound contained in the colored photosensitive layer, C ₁₇
Is a vinyl stearate-vinyl acetate copolymer (70
(Parts by weight / 30 parts by weight), and C
_{The 17-} localization means that the contained vinyl stearate-vinyl acetate copolymer (70 parts by weight / 30 parts by weight) was localized on the surface in contact with the protective layer. In Table 2, all system applications are dry color proofs.

[0109]

According to the present invention, there are provided an image forming material having a good image quality, a large latitude for peeling a protective film, and capable of smoothly peeling a protective film without resistance, a method for producing the same, and an image forming method. You can

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Saburo Hiraoka 1 Sakura-cho, Hino-shi, Tokyo Konica Stock Company

Claims (9)

[Claims] 1. An image-forming material having a release layer, a colored photosensitive layer and a protective film in this order on a transparent support has a peel force of 100 when the protective film is peeled from the colored photosensitive layer.
An image forming material having a size smaller than g / 50 mm. 2. The peeling force when peeling the transparent support and the release layer from the colored photosensitive layer after adhering the colored photosensitive layer to the transfer medium by heating and pressing is greater than 100 g / 50 mm.
The image forming material according to claim 1, wherein the image forming material has a weight of less than 000 g / 50 mm. 3. A method for producing an image-forming material having a colored photosensitive layer and a protective film on a transparent support in this order, wherein after coating the colored photosensitive layer on the transparent support, the side in contact with the colored photosensitive layer is physical. A method for producing an image-forming material, which comprises laminating a protective film, which has been subjected to a physical or chemical surface treatment, on the surface of a colored photosensitive layer. 4. An image forming material having a colored photosensitive layer and a protective film in this order on a transparent support, wherein the colored photosensitive layer contains at least one lubricant and a compound having a long chain alkyl group. Image forming material. 5. The image forming material according to claim 4, wherein at least one kind of a lubricant and a compound having a long-chain alkyl group is localized on the surface of the colored photosensitive layer which is in contact with the protective layer. 6. The image forming material according to claim 1, wherein the colored photosensitive layer has a difference in tackiness between an exposed portion and a non-exposed portion upon imagewise exposure. 7. The protective film according to claim 1, wherein the protective film is laminated at a heating temperature at which the viscosity of the colored photosensitive layer upon heating becomes 10,000 to 100,000 cps. Image forming material. 8. The image forming material according to claim 3, wherein a release layer is interposed between the transparent support and the colored photosensitive layer. 9. When forming an image using an image forming material having a release layer, a colored photosensitive layer and a protective film in this order on a transparent support, the protective film is exposed to 100 g / 50 mm from the colored photosensitive layer after exposure. After peeling with a small peeling force and adhering the colored photosensitive layer to the transfer medium under heat and pressure, the transparent support and the release layer are 100 g / 50 mm from the colored photosensitive layer.
An image forming method comprising forming an image by peeling with a peeling force larger than 2000 g / 50 mm.