JPH02287548A - Image forming method - Google Patents

Abstract

PURPOSE:To prevent the defective stripping of an image receiving material from a photosensitive material by imagewise hardening a polymerizable compd. in the photosensitive material, superposing the photosensitive material on the image receiving material, pressing and heating them. CONSTITUTION:Microcapsules contg. a polymerizable compd. such as a compd. having an ethylenic unsatd. group, a photopolymn. initiator, a color image forming material, etc., are dispersed in a PVA soln., etc., and applied to a support to obtain a photosensitive material. The polymerizable compd. in the photosensitive material is imagewise hardened and the photosensitive material is superposed on an image receiving material having an image receiving layer. They are pressed and heated to 30-300 deg.C to transfer the unpolymerized polymerizable compd., etc., and an image is formed. A photosensitive material obtd. by applying microcapsules contg. silver halide, a reducing agent, the above polymerizable compd., etc., may be similarly processed.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a photosensitive material having microcapsules containing a polymerizable composition on a support, or a photosensitive material having microcapsules containing a polymerizable composition on a support, or a photosensitive material containing a silver halide, a reducing agent, and a polymerizable composition on a support. The present invention relates to an image forming method using any of the photosensitive materials having microcapsules containing a polymerizable compound.

"Prior Art" A recording method using light and pressure is known as an image forming method using microcapsules containing a polymerizable compound.

For example, JP 57-124343, JP 64-73
77, JP 64-7378, JP 60-2642,
In JP-A No. 64-63955, a sheet in which microcapsules encapsulating a photopolymerizable composition are provided on a support is pressurized after exposure to destroy the microcapsules in the unexposed areas. Disclosed is a method for recording correspondingly.

On the other hand, an image forming method using a photosensitive material having a photosensitive layer containing silver halide, a reducing agent and a polymerizable compound on a support is disclosed in Japanese Patent Publication Nos. 45-11149 and 47-2074.
No. 1, No. 49-10697, JP-A-57-13863
No. 2 and No. 5B-169143. In these methods, when exposed silver halide is developed using a developer, the reducing agent is oxidized and at the same time coexisting polymerizable compounds (e.g. vinyl compounds) start polymerizing, resulting in high image quality. It forms a molecular compound. Therefore, the above method requires a development process using a liquid, and the process requires a relatively long time.

As an improvement on the above method, Japanese Patent Application Laid-Open No. 61-69062 describes a method in which a polymer compound can be formed by dry treatment. This method uses a photosensitive root salt (silver halide), a reducing agent, a crosslinking compound (polymerizable compound)
A latent image of a photosensitive silver salt is formed by imagewise exposing a recording material (photosensitive material) in which a photosensitive layer consisting of a binder and a binder is carried on a support to form a latent image, and then thermally developing it. A polymer compound is formed on the exposed portion.

The above image forming method is a method of polymerizing the polymerizable compound in the area where the silver halide latent image is formed.

Furthermore, a method capable of polymerizing a polymerizable compound in a portion where a latent image of silver halide is not formed was disclosed in Japanese Patent Application Laid-Open No.
It is described in Publication No. 70836. In this method, a reducing agent is caused to act on a portion where a silver halide latent image has been formed by heat development to suppress the polymerization of the polymerizable compound and at the same time promote polymerization in other portions.

One embodiment of such a recording method is image formation in which microcapsules containing silver halide, a reducing agent, and a polymerizable compound are used, and after exposure and development, pressure is applied to destroy the microcapsules in uncured areas. The method is JP-A-61-
It is described in No. 275742.

Next, in the -llLi mode of the image forming method using these photosensitive microcapsules, the microcapsules provided on the support are imagewise cured, and the unpolymerized An image forming method for transferring a polymerizable metal material to an image-receiving material is described in Japanese Patent Publication No. 7377/1982 and Japanese Patent Application Laid-open No. 278849/1983.

The recording principle of these technologies is that the microcapsules containing the polymerizable compound harden and cannot be destroyed by normal pressure, creating a difference in hardness from unhardened microcapsules. . This recording method is an excellent method for recording optical information with simple processing.

[Problems to be Solved by the Invention] However, in transfer using only pressure, generally a high-pressure pressure roller is mainly used, and from the standpoint of designing a compact and lightweight device, an image transfer method that does not rely on high pressure is needed. It was wanted. Furthermore, when transferring by pressure, the transfer rate to the image-receiving material is low, and the maximum density tends to be difficult to increase.

As a method to improve the above-mentioned problems of the transfer method using only pressure, a method was proposed in Japanese Patent Laid-Open No. 64-695, in which a photosensitive material and an image-receiving material are overlapped and heated at the same time as applying pressure.
No. 0,63-309943 and No. 63-282736. Both of these methods can efficiently and easily transfer unpolymerized polymerizable compounds by applying pressure and heating at the same time, so low-pressure transfer is also possible, and the highest concentration is possible compared to the case without heating. This method allows you to obtain high quality images.

However, according to such an image forming method, depending on the transfer conditions, poor peeling between the photosensitive material and the image-receiving material tends to occur, and white spots may appear on the image on the image-receiving material. In particular, in order to improve unevenness on the image, 1
This was noticeable when heating was performed under temperature conditions exceeding 00°C.

An object of the present invention is to provide an image forming method that solves the problems associated with image forming methods in which pressurization and heating are performed simultaneously.

[Means for Solving the Problems] The present invention involves imagewise curing of a polymeric composition of a photosensitive material having microcapsules containing a polymerizable composition on a support, and then overlaying and processing with an image-receiving material. Image formation characterized by transferring an unpolymerized polymerizable compound to an image-receiving material by pressing and heating the stacked state to a temperature in the range of 30°C to 300°C without peeling. The present invention provides a method.

Further, in the present invention, a photosensitive material having microcapsules containing a polymerizable compound, silver halide, and a reducing agent on a support is imagewise exposed to form a latent image of silver halide, and simultaneously with the imagewise exposure, Or, by performing a development process after imagewise exposure,
After applying pressure with the image-receiving material superimposed on the photosensitive material that has undergone the development process, it is possible to keep the image-receiving material superimposed on the developed photosensitive material without peeling it off, and after 30
The present invention provides an image forming method characterized in that an unpolymerized polymerizable compound is transferred to an image-receiving material by heating to a temperature in the range of 300°C to 300°C.

In addition, the pressure when pressurizing the image-receiving material in a superimposed state is preferably 400 kg/cj or less.

〔Effect of the invention〕

In the present invention, an image containing an unpolymerized polymerizable compound is transferred onto an image-receiving material by overlapping a photosensitive material and an image-receiving material, applying pressure, and then heating the image to a temperature in the range of 30°C to 300°C. It is characterized by being transcribed.

According to research conducted by the present inventors, it has been found that the above-mentioned defective peeling between the photosensitive material and the image-receiving material does not occur only by applying pressure or only by heating, but is extremely likely to occur when heating is applied at the same time as applying pressure. When heating is applied after applying pressure, high transfer density can be obtained with low transfer pressure, and 'l
It was found that llfm defects were less likely to occur.

The image forming method described in JP-A No. 62-210459 involves heating the image-receiving material after pressurizing it together with an image-receiving material, peeling it off, and forming an image. It does not suggest a method of heating while in close contact with each other.

[Detailed description of the invention]

Photosensitive materials that can be used in the image forming method of the present invention will be described below.

This photosensitive material includes a first type B having microcapsules containing a polymerizable composition on a support, and microcapsules containing silver halide, a reducing agent, and a polymerizable compound on a support. This includes those according to the second aspect. The photosensitive material having the above structure will be simply referred to as "Photosensitive material J" hereinafter.

Hereinafter, the photosensitive materials of Daiichi 0S will be explained one by one.

For the polymerizable composition, a mixture of a photopolymerization initiator and a polymerizable compound can be used.

Examples of preferred photopolymerization initiators include α-alkoxyphenyl ketones, polycyclic quinones, benzophenones and substituted benzophenones, xanthones, thioxanthones, halogenated compounds (e.g., chlorosulfonyl, chloromethyl, etc.). aromatic compounds, chlorosulfonyl and chloromethyl heterocyclic compounds, chlorosulfonyl and chloromethylbenzophenones, and fluorenones), haloalkanes, α-halo αphenylacetophenones, photoreducible dye-reducible redox couples , halogenated paraffins (eg, brominated or chlorinated paraffins), benzoyl alkyl ethers, and lophine dimer-mercapto compound couples.

Specific examples of preferred photopolymerization initiators include hendiylbutyl, 2,2-dimethoxy-2-phenylacetophenone, and 9. IO-anthraquinone, hensifenone, Michlagetone, 4,4'-diethylaminobenzophenone, xanthone, chloroxanthone, thioxane, chlorothioxanthone, 2,4-diethylthioxanthone, chlorosulfonylthioxanthone, chlorosulfonylanthraquinone, chloromethylanthracene, chloromethyl Benzothiazole, chlorosulfonylbenzoxazole, chloromethylquinoline, chloromethylbenzophenone, chlorosulfonylbenzophenone, fluorenone, carbon tetrabromide, benzoin butyl ether, benzoin isopropyl ether, 2.2'-bis(θ-
Examples include a combination of (chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole and 2-mercapto-5-methylthio-13,4-thiadiazole.

As the photopolymerization initiator, the above-mentioned compounds may be used alone, or several types may be used in combination.

In the photosensitive material of the present invention, the photopolymerization initiator is preferably used in an amount of 0.5 to 30% by weight based on the polymerizable compound used. A more preferable usage range is
2 to 20% by weight.

The polymerizable compound is not particularly limited and any known polymerizable compound can be used. In addition, as a method of using the photosensitive material, it is preferable to use a compound with a high boiling point (for example, a boiling point of 80° C. or higher) that is difficult to volatilize during heating for heat treatment. In the embodiment containing a color image forming substance as a component, the color image forming substance is immobilized by polymerization and curing of the polymerizable compound, so the polymerizable compound is a crosslinkable compound having a plurality of polymerizable functional groups in the molecule. It is preferable that

Note that polymerizable compounds that can be used in photosensitive materials are described in the application abstracts related to the series of photosensitive materials described above and below.

Polymerizable compounds used in photosensitive materials generally have addition polymerizability or ring-opening polymerizability. Compounds having addition polymerizability include compounds having an ethylenically unsaturated group, compounds having ring-opening polymerizability include compounds having an epoxy group, and compounds having an ethylenically unsaturated group are particularly preferred.

Compounds with ethylenically unsaturated groups that can be used in photosensitive materials include acrylic acid and its salts, acrylic esters, acrylamides, methacrylic acid and its salts, methacrylic esters, methacrylamides, and maleic anhydride. Acids, maleic esters, itaconic esters, styrenes, vinyl ethers, vinyl esters, N-vinyl heterocycles, allyl ethers, 7
1J) Li esters and their derivatives.

Specific examples of polymerizable compounds that can be used in photosensitive materials include acrylic esters such as n-butyl acrylate, cyclohexyl acrylate, 2-ethylhexyl acrylate, benzyl acrylate, furfuryl acrylate, and ethoxyethoxyethyl acrylate. Acrylate, dicyclohexyloxyethyl acrylate, nonylphenyloxyethyl acrylate, hexanediol diacrylate, butanediol diacrylate, neopentyl glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipenta Erythritol hexaacrylate,
Diacrylate of polyoxyethylated bisphenol A, diacrylate of 2,2-dimethyl-3-hydroxypropionaldehyde and trimethylolpropane condensate, triacrylate of 2,2-dimethyl-3-hydroxypropionaldehyde and penquerythritol condensate, Examples include triacrylate of a propylene oxide adduct of trimethylolpropane, polyacrylate of hydroxypolyether, polyester acrylate, and polyurethane acrylate.

Other specific examples of methacrylic acid esters include methyl methacrylate, butyl methacrylate, ethylene glycol dimethacrylate, butanediol dimethacrylate, neopentyl glycol dimethacrylate, trimethylolpropane trimethacrylate, pentaerythritol trimethacrylate, Examples include pentaerythritol tetramethacrylate and polyoxyalkylenated bisphenol A dimethacrylate.

The above-mentioned polymerizable compounds may be used alone or in combination of two or more types. A photosensitive material using a combination of two or more types of polymerizable compounds is described in JP-A-62-210445. Note that a substance in which a polymerizable functional group such as a vinyl group or a vinylidene group is introduced into the chemical structure of the above-mentioned reducing agent or a color image forming substance which is an optional component described later can also be used as a polymerizable compound. Needless to say, the use of a reducing agent and a polymerizable compound, or a substance that serves both as a color image forming substance and a polymerizable compound, as described above, is also included in the embodiment of the photosensitive material.

The photosensitive material of the first embodiment is used in a state in which the polymerizable composition is microencapsulated.

The microcapsules used in the present invention can be produced by methods known in the art. For example, a method utilizing coacervation of a hydrophilic wall-forming material as seen in US Pat. No. 2,800,457 and US Pat.
No. 87154, British Patent No. 990443, Special Publication No. 1973-
No. 19574, Kaikai No. 42-446, Kaikai No. 42-771
Interfacial polymerization method as seen in US Pat. No. 3,418,25
No. 0, No. 3,660,304, by polymer precipitation, US Pat. No. 3,796,669, using isocyanate-polyol wall materials, US Pat.
914511, U.S. Pat. No. 4,001,140, U.S. Pat. No. 4,087,376
A method using a urea-formaldehyde-based or urea-formaldehyde-resorcinol light wall-forming material as seen in U.S. Pat. Insila (in 5iLu) produced by polymerization of monomers as seen in Japanese Patent Publication No. 36-9168 and Japanese Patent Publication No. 51-9079
method, the polymerization dispersion cooling method as seen in British Patent Nos. 952,807 and 965,074, and the spray drying method as seen in US Pat. No. 3,111,407 and British Patent No. 930,422.

Although not limited thereto, it is preferable to emulsify the core material and then form a polymer membrane as the microcapsule wall.

The size of the capsule used in the present invention is 80μ or less,
In particular, from the viewpoint of storage and handling, the capsule size is preferably 20μ or less.If the capsule is too small, there is a risk that it will disappear into the pores or fibers of the substrate, but this depends on the nature of the substrate or support, so it cannot be generalized. Although not possible, it is preferably 0.1μ or more.

Optional components that can be included in microcapsules containing polymerizable compounds include sensitizers, photopolymerization inhibitors,
These include oxygen scavengers and color imaging materials.

Preferred sensitizers are those that increase sensitivity when used in combination with the photopolymerization initiator or photopolymerization initiation system described above, and examples thereof include compounds having active hydrogen in the molecule. Specific examples thereof include N-phenylglycine, trimethylbarbital acid, 2-mercaptobenzoxazole, 2-mercaptohendithiazole, 2-mercaptobenzimidazole, and the following - formula (+)
or (It).

In the formula, R1 represents an alkyl group, an alkylthio group or a mercapto group.

R1 In the formula, R□ represents a hydrogen atom or an alkyl group, and R1
represents an alkyl group or an aryl group.

In the image forming method of the present invention, the sensitizer is preferably used in an amount of 0.5 to 100% by weight based on the polymerizable compound used. A more preferred range is 2 to 801 ft%.

Next, as a preferable photopolymerization inhibitor, compounds commonly known as thermal polymerization inhibitors can be used, and specific examples include p-methoquinophenol, hydroquinone,
Examples include alkyl- or aryl-substituted hydroquinone, t-butylcatechol, naphthylamine, β-naphthol, nitrobenzene, dinitrobenzene, p-toluidine, and the like.

The preferred range of use is 0.001 to 10 of the polymerizable compound.
% by weight, more preferably 0. It is 1% by weight from Ol.

Note that the polymer composition can be thermally cured instead of photocuring by using a thermal polymerization initiator as described below instead of the photopolymerization initiator.

Next, preferred oxygen scavengers include organic phosphines, organic phosphonates, organic phosphites, and stannous salts. The preferred usage range is 1 to 50% by weight.

The photosensitive material can also form a color image by incorporating a color image-forming substance as an optional component into microcapsules containing a polymerizable compound.

There are no particular restrictions on the color image-forming substance that can be used in the photosensitive material, and various types can be used. In other words, substances that themselves are colored (dyes and pigments), and substances that are colorless or light in color but are affected by external energy (heating, pressure, light irradiation, etc.) or other components (color developers). Substances that develop color upon contact (color formers) are also included in color image forming substances.

Dyes and pigments, which are substances that color themselves, are available commercially as well as in various literature (for example, "Dye Handbook" edited by the Organic Synthetic Chemistry Association, published in 1970; "Latest Pigment Handbook" edited by the Japan Pigment Technology Association; The publicly known one described in ``Published in 1972'' can be used. These dyes or pigments are used after being dissolved or dispersed.

On the other hand, examples of substances that develop color due to some kind of energy such as heating, pressure, or light irradiation include thermochromic compounds,
Piezochromic compounds, photochromic compounds, and leuco compounds such as triarylmethane dyes, quinone dyes, indigoid dyes, and azine dyes are known. All of these develop color upon heating, pressurization, light irradiation, or air oxidation.

Examples of substances that develop color upon contact with another component include various systems that develop color due to acid-base reactions, redox reactions, coupling reactions, chelate formation reactions, etc. between two or more components.

For example, Hiroyuki Moriga's ``Introductory Chemistry of Special Papers''
Known coloring systems such as pressure-sensitive copying paper (pages 29-58), azography (pages 87-95), thermal coloring by chemical change (pages 118-120), or Kinki Kagaku Utilize the coloring system etc. described in the seminar sponsored by the industry association, "Latest Pigment Chemistry - Attractive Applications and New Developments as Functional Pigments - 1", pp. 26-32 (June 19, 1980). Specifically, a coloring system consisting of a coloring agent with a partial structure such as lactone, lactam, spiropyran, etc. used in pressure-sensitive paper and an acidic substance (color developer) such as acid clay or phenols: aromatic. Systems using ab-coupling reactions of diazonium salts, diazotates, diazosulfonates, naphthols, anilines, active methylenes, etc.; reactions of hexamethylenetetramine with ferric ions and gallic acid, and phenolphthalein-combination reactions. Chelate-forming reactions such as reactions between clans and alkaline earth metal ions;
Redox reactions such as the reaction between ferric stearate and pyrogallol and the reaction between silver behenate and 4-methoxy-1-naphthol can be used.

The color image forming substance is preferably used in a proportion of 0.5 to 50 parts by weight per 100 parts by weight of the polymerizable compound,
It is more preferably used in a proportion of 2 to 30 parts by weight, and when a color developer is used, it is preferably used in a proportion of about 0.3 to 80 parts by weight per 1 part by weight of the color former.

The support is then capable of withstanding the processing temperatures and pressures. - As a support for boat fishing, glass, paper, high quality paper, coated paper, art paper, synthetic paper, metal and their analogues are used, as well as acetyl cellulose film, cellulose ester film, polyvinyl acecool film, Included are polystyrene films, polycarbonate films, polyethylene terephthalate films and related films or resin materials. Paper supports laminated with polymers such as polyethylene can also be used.

Next, the second embodiment of the photosensitive material will be explained.

First, silver halide, reducing agent, and polymerizable compound will be explained in order.

As the silver halide mentioned above, any grains of silver chloride, silver bromide, silver iodide, silver chlorobromide, silver chloroiodide, silver iodobromide, and silver chloroiodobromide can be used.

The halogen composition of the silver halide grains may be uniform or non-uniform on the surface and inside. Regarding silver halide grains having multiple structures with different compositions on the surface and inside, Japanese Patent Application Laid-open Nos. 57-154232 and 58-10853 disclose
No. 3, No. 59-48755, No. 59-52237, U.S. Pat. No. 4,433,048 and European Patent No. 1
It is described in the specification of 00984. Also, JP-A-62
Silver halide grains having a high proportion of silver iodide in the shell portion may be used, as in the photosensitive material described in Japanese Patent No. 183453.

There is no particular restriction on the crystal habit of the silver halide grains; for example, tabular grains having an aspect ratio of 3 or more may be used, as in the light-sensitive material described in JP-A-62-210455.

In addition, as the silver halide grains mentioned above, Japanese Patent Application Laid-Open No. 63-6
It is preferable to use silver halide grains having a relatively low fog value, such as the light-sensitive material described in Japanese Patent No. 8830.

Silver halide used in photosensitive materials has a halogen composition,
Two or more types of silver halide grains having different crystal habits, grain sizes, etc. can also be used together.

There are no particular restrictions on the grain size distribution of silver halide grains. For example, monodisperse silver halide grains with a substantially uniform grain size distribution are used, as in the photosensitive material described in JP-A No. 62-210448. It's okay.

In the light-sensitive material, the average grain size of silver halide grains is preferably in the range of 0.001 to 5 μm, more preferably in the range of 0.001 to 2 μm.

The amount of silver halide contained in the photosensitive layer is from 0°1 to 10% in terms of silver, including organic silver salt, which is an optional component described below.
It is preferable to set it as the range of g/ry+.

In addition, when converting only silver halide into silver, I g/rrr
It is preferable to set it to the following, and it is especially preferable to set it to the range of 1Qr to 500■/d.

A reducing agent that can be used in a light-sensitive material has a function of reducing silver halide and/or a function of promoting (or inhibiting) polymerization of a polymerizable compound. There are various types of reducing agents having the above functions. The reducing agents include hydroquinones, catechols, p-aminophenols, p-phenylenediamines, 3-pyrazolidones, 3-aminopyrazoles, 4-amino-5-
Pyrazolones, 5-aminouracils, 4,4-dihydroxy-6-7minopyrimidines, reductones, amylreductones, 0- or p-sulfonamidophenols, O- or p-sulfonamidonaphthols,
2-sulfonamide indanones, 4-sulfonamide-5-pyrazolones, 3-sulfonamide indoles, sulfonamide pyrazolobenzimidazoles, sulfonamide pyrazolotriazoles, α-sulfonamide ketones, hydrazines, etc. There is. By adjusting the type, amount, etc. of the reducing agent, it is possible to polymerize the polymerizable compound in either the area where the silver halide latent image is formed or the area where no latent image is formed. In addition, in a system in which a polymerizable compound is polymerized in a portion where a silver halide latent image is not formed, it is particularly preferable to use 1-phenyl-3-pyrazolidones as the reducing agent.

Regarding various reducing agents having the above functions, please refer to JP-A-61-183640, JP-A No. 61-188535, and JP-A-61-188535.
Publications No. 1-228441 and JP-A-62-7
No. 0836, No. 62-86354, No. 62-8635
No. 5, JP-A-62-264041, JP-A-61-19
Described in publications such as No. 8849 and specifications! 3! (including those described as developing agents or hydrazine derivatives).

Regarding the above reducing agent, T. James "ft"
The Theory of the Photographer
aphIc Process 4th board, 291-3
34 Makoto (1977), Research Disclosure Vol. 170. No. 17029, June 1978 (pp. 9-15), and Vol.

176. No. 17643 of December 1978 (22-3
There is also a description on page 1). Also, JP-A-62-21044
As in the photosensitive material described in Publication No. 6, a reducing agent precursor capable of releasing the reducing agent under heating conditions or in contact with a base may be used in place of the reducing agent. The reducing agents and reducing agent precursors described in each of the above-mentioned publications, specifications, and literature can also be effectively used in the photosensitive material used in this specification.

Therefore, the "reducing agent" in this specification includes the reducing agents and reducing agent precursors described in each of the above-mentioned publications, specifications, and literature. These reducing agents may be used alone, but
As described in each of the above specifications, two or more types of reducing agents may be used in combination. When using two or more types of reducing agents together, the interaction of the reducing agents is, firstly, due to so-called superadditivity.
or organic silver salt), and secondly, oxidation with another reducing agent in which the oxidized form of the first reducing agent generated by reduction of silver halide (and/or organic silver salt) coexists. Possible methods include causing polymerization of a polymerizable compound (or suppressing polymerization) via a reduction reaction.

However, in actual use, the reactions described above can occur simultaneously, so it is difficult to specify which effect is responsible.

Specific examples of the reducing agent include pentadecylhydroquinone, 5-1-butylcatechol, p(N,N-diethylamino)phenol, l-phenyl-3-pyrazolidone, 5-phenyl-3pyrazolidone, 1,5-diphenyl -3-pyrazo IJ l'n, 1-phenyl-4-methyl-4-hydroxymethyl-3-pyrazolidone, 1-phenyl4-methyl-4-heptadecylcarbonyloxymethyl-3-pyrazolidone, 2-phenylsulfa Moyl-4-hexadecyloxy-5-t-octylphenol, 2-phenylsulfamoyl-4-t-butyl-5
-hexadecyloxyphenol, 2-(N-butylcarbamoyl)-4phenylsulfonylaminonaphthol, 2-(N-methyl-N-octadecylcarbamoyl)-
4=sulfamoylnaphthol, 1-formyl-2(methoxyphenyl)hydrazine, ■-formyl-2-(2
-chlorophenyl)hydrazine, 1-formyl-2-(
2-butoxyphenyl)hydrazine, 1-(3,5-
dichlorobenzoyl) = 2-phenylhydrazine, 1-
(3,5-dichlorobenzoyl)-2-(2-chlorophenyl)hydrazine, l-acetyl-2-phenylhydrazine, 1-acetyl-2-((p or 0)-aminophenyl)hydrazine, l-formyl-2 ((p or 0)-aminophenyl)hydrazine,! -acetyl-2-i(p or 0)-methoxyphenyl)hydrazine, l-lauroyl-2((p or 0)-aminophenyl)hydrazine, 1-)lythyl-2-(2,6-dichloro-4-cyanophenyl) ) hydrazine, 1-trityl-2phenylhydrazine, l-phenyl-2-(2゜4
．． 6-Dolichlorophenyl)hydrazine, 1[2-(2
,5-di-L-pentylphenoxy)butyroyl l-2
-((p or O)-aminophenyl)hydrazine, 1
- +2- (2,5-di-t-pentylphenoxy)butyroyl)-21(p or O)-aminophenyl)hydrazine pentadecylfluorocaprylate, 3-indazolinone,! -(3,5-dichlorobenzoyl)2
-phenylhydrazine, t-trityl-2[((2-N
-butyl-N-octylsulfamoyl)-4-methanesulfonyl)phenyl]hydrazine, l-+4- (2
,5-di-L-pentylphenoxy)butyroyl l-2
-((p or 0)-methoxyphenyl)hydrazine,
1-(methoxycarbonylbenzohydryl)-2-phenylhydrazine, 1-formyl-2-[4-+2- (
24-di-t-pentylphenoxy)butyramido)phenylhydrazine, 1-acetyl-2-[4(2-(2
, 4-di-t-pentylphenoxy)butyramido)phenyl]hydrazine, 11 lythyl-2-[(2,6-dichloro-4-(N,N-di-2-ethylhexyl)carbamoyl)phenyl]hydrazine, l-(meth) quincarbonylbenzohydryl)-2-(2,4-dichlorophenyl)hydrazine, 1-)richyl-2-[(2(N-ethyl-N-octylsulfamoyl)4-methanesulfonyl)phenyl]hydrazine, l- Benzoyl-2-tritylhydrazine, 1(4-butoxybenzoyl”)-
2-) lytylhydrazine, 1-(2,4-dimethoxybenzoyl)2-tritylhydrazine, 1-(4-dibutylcarbamoylbenzoyl)-2-)lythylhydrazine, and 1-(1-naphthoyl)-2-tritylhydrazine etc. can be mentioned.

In the light-sensitive material, the reducing agent is preferably used in an amount of 0.1 to 1500 mol % per 1 mol (including the above-mentioned silver halide and optional organic silver salt).

The polymerizable compounds that can be used in the photosensitive material of the second embodiment are the same as those of the first embodiment described above. In the second LB-like light-sensitive material, the polymerizable compound is preferably used in an amount of 5 to 120,000 parts by weight, more preferably 12 to 120,000 parts by weight per 1 part by weight of silver halide.
00 parts by weight.

All of the photosensitive compositions described above are used in the form of microcapsules. The above-mentioned known techniques can be applied to the microcapsules without any particular limitations. Note that an example of a photosensitive material in which a polymerizable compound is in the form of microcapsules is disclosed in JP-A No. 61-2784.
There is a description in Publication No. 41.

There are no particular restrictions on the wall material that constitutes the outer shell of the microcapsules. Regarding photosensitive materials using microcapsules with outer shells made of polyamide resin and/or polyester resin, Japanese Patent Application Laid-Open No. 62-209437 describes microcapsules with outer shells made of polyurea resin and/or polyurethane resin. The photosensitive material used is described in JP-A-62-209438, and the photo-sensitive material using microcapsules having an outer shell made of amino aldehyde resin is described in JP-A-62-209.
No. 439 describes a photosensitive material using microcapsules having an outer shell made of gelatin.
No. 440 discloses a photosensitive material using microcapsules having an outer shell made of epoxy resin, as described in Japanese Patent Laid-Open No. 62
JP-A-209441 discloses a photographic material using a microcapsule having a composite resin shell containing a polyamide resin and a polyurea resin; Photosensitive materials using microcapsules having the above-mentioned properties are described in JP-A-62-209442.

In addition, when using aldehyde-based microcapsules, it is preferable to keep the amount of residual aldehyde below a certain value, as in the photosensitive material described in JP-A-63-32535.

When silver halide is contained in microcapsules, it is preferable that silver halide be present in the wall material constituting the outer shell of the microcapsules. Regarding photosensitive materials containing silver halide in the wall material of microcapsules, JP-A-62
There is a description in the publication No.-169147.

In addition, two or more microcapsules in which at least one component is different among the components contained in the microcapsules, such as silver halide, a reducing agent, a polymerizable compound, and a color image forming substance, which is an optional component described later, may be used in combination. In particular,
When forming a full-color image, it is preferable to use two or more types of microcapsules containing different color image-forming substances in different hues. For photosensitive materials that use two or more types of microcapsules in combination, special 1986
It is described in the -198850 publication.

The average particle size of the microcapsules is preferably in the range of 3 to 20 μm.The particle size distribution of the microcapsules is preferably uniform over a certain value, as in the photosensitive material described in JP-A No. 63-5334. Preferably, it is distributed. In addition, the film thickness of the microcapsule is
As in the photosensitive material described in Japanese Patent No. 1336, the particle size is preferably within a certain range.

In addition, when storing silver halide in microcapsules, the average particle size of the silver halide grains mentioned above is preferably one-fifth or less, preferably one-tenth or less, of the average size of the microcapsules. is even more preferable. A uniform and smooth image can be obtained by setting the average particle size of the silver halide grains to one-fifth or less of the average size of the microcapsules.

The light-sensitive material may also contain a color image-forming substance as an optional component.

There is no particular restriction on the color image forming substance that can be used in the light-sensitive material, and various AM substances can be used, as in the case of the first type M described above.

Incidentally, general photosensitive materials using color image-forming substances are described in JP-A-61-73145. Also,
For photosensitive materials using dyes or pigments as color image forming substances, see JP-A-62-187346, and for photosensitive materials using leuco dyes, see JP-A-62-2094.
36, for photosensitive materials using triazene compounds, see JP-A No. 62-251741, and for photosensitive materials using yellow coloring leuco dyes, see JP-A No. 62-251741.
JP-A-288827 and JP-A-62-288828, and JP-A-63-53542 describes light-sensitive materials using cyan color-forming leuco dyes.

Further, optional components that can be included in the photosensitive layer of the photosensitive material include sensitizing dyes, 15 Ft salts, radical generators, various image formation accelerators, thermal polymerization inhibitors, thermal polymerization initiators, and development stoppers. , fluorescent whitening agents, anti-fading agents, dyes or pigments for preventing halation or irradiation, pigments that can be decolored by heating or light irradiation, matting agents, anti-smudge agents, plasticizers, water-releasing agents, binders, Examples include photopolymerization initiators, solvents for polymerizable compounds, and water-soluble vinyl polymers.

The sensitizing dye that can be used in the light-sensitive material is not particularly limited, and silver halide sensitizing dyes known in the photographic technology can be used. The above-mentioned sensitizing dyes include methine dyes, cyanine dyes, merocyanine dyes, complex cyanine dyes, holopolar cyanine dyes, hemicyanine dyes,
Includes styryl dyes and hemioxonol dyes. These sensitizing dyes may be used alone or in combination. Especially when the purpose is supersensitization, it is common to use a combination of sensitizing dyes. be. In addition, along with the sensitizing dye, a dye that itself does not have a spectral sensitizing effect, or a substance that does not substantially absorb visible light but exhibits supersensitization may be used in combination.The amount of the sensitizing dye added is as follows: Generally from about 1 O-8 to about 1 per mole of silver halide
The range is up to 0-' mol.

The aggravating dye described above is preferably added at the stage of preparing a silver halide emulsion, which will be described later. Regarding a light-sensitive material obtained by adding a sensitizing dye in the stage of forming silver halide grains, Japanese Patent Application Laid-Open No. 62947 describes that a sensitizing dye is added in the stage of preparing a silver halide emulsion after forming silver halide grains. The photosensitive materials obtained by adding these are described in JP-A-62210449. Also,
Specific examples of aggravating dyes that can be used in photosensitive materials are also described in the above-mentioned JP-A-62-947 and JP-A-62-2.
It is described in Publication No. 10449. Also, JP-A-63
A sensitizing dye sensitive to infrared light may be used in combination, as in the photosensitive material described in No. 184738.

Addition of organic silver salts to photosensitive materials is particularly effective in thermal development processing. That is, when heated to a temperature of 80° C. or higher, the organic silver salt is considered to participate in an oxidation-reduction reaction using the latent image of silver halide as a catalyst. In this case, the silver halide and the organic silver salt are preferably in contact or in close proximity. Examples of the organic compound constituting the organic silver salt include aliphatic or aromatic carboxylic acids, thiocarbonyl group-containing compounds having a mercapto group or α-hydrogen, and imino group-containing compounds. Among them, hensitriazoles are particularly preferred. The above organic silver salt is generally a halogenated S
0. It is used in an amount of 1 to 10 moles, preferably 0.01 to 1 mole. In addition,
A similar effect can be obtained by adding an organic compound (for example, benzotriazole) constituting the organic silver salt to the photosensitive layer instead of the organic silver salt. A photosensitive material using an organic silver salt is described in JP-A-62-3246. The organic silver salt as described above is preferably used in an amount of 0.1 to 10 mol, more preferably 0.01 to 1 mol, per 1 mol of silver halide.

A radical generator that participates in the above-mentioned polymerization acceleration (or polymerization inhibition) reaction of the reducing agent may be added to the photosensitive layer.

Regarding the photosensitive material using silver triazene as the radical generator, see JP-A No. 62195639, and JP-A No. 62-1 regarding the photosensitive material using silver dibutate.
95640, and Japanese Patent Application Laid-open No. 195641/1983 describes a photosensitive material using an azo compound.

Various image formation accelerators can be used in the photosensitive material. Image formation accelerators include those that promote the redox reaction between silver halide (and/or a silver salt) and a reducing agent, and those that promote the redox reaction between a silver halide (and/or a silver salt) and a reducing agent; It has functions such as promoting the movement of image-forming substances.

From the viewpoint of physicochemical functions, image formation accelerators include bases,
They are further classified into base precursors, oils, surfactants, compounds with antifogging functions and/or development promoting 11ii functions, thermal solvents, compounds with oxygen removal functions, and the like. However, these substance groups generally have multiple functions and usually have some of the above-mentioned promoting effects. Therefore, the above classification is for convenience, and in reality, one compound often has multiple functions.

Examples of various image formation accelerators are shown below.

Examples of preferred bases include, as inorganic bases, alkali metal or alkaline earth metal hydroxides; alkali metal or alkaline earth metal tertiary phosphates, borates;
Carbonates, metaborates; combinations of zinc hydroxide or zinc oxide with chelating agents such as sodium picolinate:
Ammonium hydroxide - hydroxide of quaternary alkylammonium; hydroxide of other metals, etc. Examples of organic bases include aliphatic amines (trialkylamines,
hydroxylamines, aliphatic polyamines); aromatic amines W4 (N-alkyl substituted aromatic amines ll, N-
Hydroxylalkyl exchangeable aromatic amines and bis[
p-(dialkylamino)phenylcomethanes), heterocyclic amines, amidines, cyclic amidines, guanidines, cyclic guanidines, etc., especially those with a pKa of 7.
The above are preferred.

Examples of base precursors include salts of organic acids and bases that decarboxylate when heated, compounds that release amines through reactions such as intramolecular nucleophilic substitution, Rossen rearrangement, and Beckmann rearrangement. Compounds that emit bases and compounds that generate bases by electrolysis or the like are preferably used. Specific examples of base precursors include guanidine trichloroacetic acid, piperidine trichloroacetic acid, morpholine trichloroacetic acid, p-toluidine trichloroacetic acid, 2-picoline trichloroacetic acid, guanidine phenylsulfonylacetate, 4-chlorophenylsulfonylacetate guanidine, 4-methyl-sulfonyl Examples include guanidine phenylsulfonylacetate and guanidine 4-acetylaminomethylpropiolate.

The base or base precursor can be used in the photosensitive material in a wide range of amounts. The base or base precursor is suitably used in an amount of 100% by weight or less, more preferably 0.1% by weight of the coating film of the photosensitive layer.
In the present invention, the base and/or base precursor may be used alone or as a mixture of two or more.

Incidentally, a photosensitive material using a base or a base precursor is described in JP-A-62-264041. Further, regarding a photosensitive material using a tertiary amine as a base, see JP-A-62-170954, and about a photosensitive material using a fine particle dispersion of a hydrophobic organic base compound with a melting point of no-10'c. is Japanese Patent Publication No. 61-2095
No. 23 describes a photosensitive material using a guanidine derivative with a solubility of 0.1% or less in JP-A No. 62-21563.
In the specification of No. 7, regarding photosensitive materials using hydroxides or salts of alkali metals or alkaline earth metals, JP-A No. 6
Each of these is described in the specification of No. 2-209448.

Furthermore, regarding a photosensitive material using an acetylide compound as a base precursor, JP-A-63-24242 discloses a photosensitive material using a propiolate as a base precursor.
Furthermore, regarding photosensitive materials containing silver, copper, silver compounds, or copper compounds as catalysts for base-forming reactions, JP-A-63-46
No. 446 discloses the above propiolic acid salt and the above silver, copper,
Regarding a photosensitive material containing a silver compound or a copper compound isolated from each other, JP-A-63-81338 discloses that in addition to the above-mentioned propiolic acid salt and the above-mentioned silver, copper, silver compound, or copper compound, coordination in the am state For a photosensitive material containing a base precursor, see JP-A No. 63-9'7942, and for a photosensitive material that uses a propiol salt as a base precursor and further contains a heat-melting compound as a reaction accelerator for the base-forming reaction, see JP-A No. 63-9'7942. 63-46447 describes a photosensitive material that uses a sulfonylacetate as a base precursor and further contains a heat-melting compound as a reaction accelerator for the base production reaction, as described in JP-A-63-48543. A photographic material using a compound in which isocyanate or isothiocyanate is bonded to is described in JP-A-63-24242.

When using a base or base precursor in a photosensitive material,
It is preferable that a base or a base precursor be present in the photosensitive layer outside the aforementioned microcapsules. In this case, a photosensitive material using microcapsules containing a base or a base precursor may contain a base or a base precursor in another microcapsule, such as the photosensitive material described in JP-A-62-209521. In addition to the above specification, Japanese Patent Application Laid-Open No. 62209522 describes a photosensitive material in which a base or a base precursor is dissolved or dispersed in an aqueous solution of a water retention agent and housed in a microcapsule. The photosensitive material contained in microcapsules was published in 1986.
2-209526, the melting point is from 70°C to 210°C.
Photosensitive materials using microcapsules containing basic compounds in the range of 1 to 1 are described in JP-A No. 63-65437. In addition, instead of the microcapsules containing the above base or base precursor,
Particles containing a base or a base precursor and a hydrophobic substance in a compatible state may be used, such as the Pig photosensitive material No. 97943.

The base or base precursor is described in Japanese Patent Application Laid-Open No. 62-2
As described in Japanese Patent No. 53140, it may be added to an auxiliary layer other than the photosensitive layer (a layer containing a base or a base precursor, which will be described later).

Furthermore, as described in JP-A-63-32546, the above-mentioned support may be made porous and a base or a base precursor may be contained in this porous support.

In addition, in order to accelerate the development,
As described in Japanese Patent No. 62-313482 and No. 63-92686, a base or a base precursor can be accommodated in the microcapsules described above together with silver halide, a reducing agent, and a polymerizable compound. in this case,
The base precursors described in Japanese Patent Application Nos. 62-150973 and 62-226134 are preferred.

As the oil, a high boiling point organic solvent used as a solvent for emulsifying and dispersing hydrophobic compounds can be used.

Examples of the surfactant include pyridinium salts, ammonium salts, and phosphonium salts described in JP-A-59-74547, and polyalkylene oxides described in JP-A-59-57231.

A compound having an antifogging function and/or a development accelerating function can be used for the purpose of obtaining a clear image (an image with a high S/N ratio) having a high maximum density and a low minimum density. Note that a photosensitive material using an antifoggant as a compound having an antifogging function and/or a development accelerating function is described in JP-A-62-151838, and a photosensitive material using a compound having a cyclic amide structure is described in JP-A-62-151838. For photosensitive materials using thioether compounds, see JP-A-61-151841, and JP-A-62-151841.
151842, polyethylene glycol v, l
Regarding photosensitive materials using l-integrated, JP-A-62-151
843, JP-A-62-151844 for photosensitive materials using thiol derivatives, and JP-A-62-17 for photosensitive materials using acetylene compounds.
8232, JP-A-62-183450 for photosensitive materials using sulfonamide derivatives, and JP-A-62-183450 for photosensitive materials using quaternary ammonium salts.
No. 3-91653 has a description of each.

Useful examples of the thermal solvent include compounds that can serve as solvents for reducing agents, and compounds with high dielectric constants that are known to accelerate the physical development of silver salts. Useful thermal solvents include:
Polyethylene glycols described in U.S. Patent No. 3,347,675, derivatives such as oleate esters of polyethylene oxide, beeswax, monostearin, -SO
, - and/or -C〇- groups, polar substances described in U.S. Pat. No. 3,667,959, 1,10-decane described in Research Disclosure magazine, December 1976 issue, pages 26-28 Diol, methyl anisate, biphenyl perate, etc. are preferably used. Incidentally, a photosensitive material using a heat solvent is described in JP-A-62-86355.

A compound having an oxygen removing function can be used for the purpose of eliminating the influence of oxygen (M, element has a polymerization inhibiting effect) during development. Examples of compounds having an oxygen removing function include compounds having two or more mercapto groups. Note that a photosensitive material using a compound having two or more mercapto groups is described in JP-A-62-209443.

Further, a liquid having an oxygen-blocking effect may be added to the photosensitive layer of the outer shell of the microcapsule for development.A specific example of the liquid is water.

Thermal polymerization initiators that can be used in photosensitive materials include -m
It is a compound that thermally decomposes under heating to generate polymerization initiating species (especially radicals), and is usually used as an initiator for radical polymerization. Thermal polymerization initiators are described in Volumes 6 to 181 of the Society of Polymer Science Editorial Committee for Polymer Experiments (Addition Polymerization/Ring-Opening Polymerization J, 1983, Kyoritsu Publishing). Specific examples of thermal polymerization initiators include azobisisobutyronitrile, 1. 1'-Azobis (l
-cyclohexanecarbonitrile), dimethyl-2゜2
°-azobisisobutyrate, 2.2-azobis(2-
azo compounds such as methylbutyronitrile), azobisdimethylvaleronitrile, organic peroxides such as benzoyl peroxide, di-t-butyl peroxide, dicumyl peroxide, t-butyl hydroperoxide, and cumene hydroperoxide. , hydrogen peroxide, inorganic peroxides such as potassium persulfate and ammonium persulfate, and sodium p-toluenesulfinate. The thermal polymerization initiator is preferably used in an amount of 0.1 to 120% by weight, more preferably 1 to 10% by weight, based on the polymerizable compound. In a system in which a polymerizable compound is polymerized in areas where no image is formed, it is preferable to add a thermal polymerization initiator to the photosensitive layer. Furthermore, a photosensitive material using a thermal polymerization initiator is described in JP-A-62-70836.

A development stopper that can be used in photosensitive materials is a compound that neutralizes the base or reacts with the base to reduce the base concentration in the film and stop development immediately after proper development, or a compound that interacts with silver and silver salts. It is a compound that suppresses development. Specific examples include acid precursors that release acids when heated, electrophilic compounds that cause a substitution reaction with a coexisting base when heated, nitrogen-containing heterocyclic compounds, mercapto compounds, and the like. Examples of acid precursors include JP-A-60-1
Examples thereof include oxime esters described in JP-A No. 08837 and No. 60-192939, and compounds which release an acid by Rossen rearrangement described in JP-A-60-230133. In addition, as an example of an electrophilic compound that causes a substitution reaction with a base when heated, JP-A-60-230
Examples include the compounds described in Publication No. 134.

A dye or pigment may be added to the photosensitive layer of the photosensitive material for the purpose of preventing halation or irradiation. Note that JP-A-6329748 describes a photosensitive material in which a white pigment is added to the photosensitive layer for the purpose of preventing halation or irradiation.

A dye having the property of being decolored by heating or light irradiation may be included in the microcapsules. The dye having the property of being decolored by heating or light irradiation can function as a yellow filter in conventional silver salt photography. A photosensitive material using a dye having the property of being decolored by heating or light irradiation as described above is described in JP-A-63-97940.

The anti-smudge agent used in the photosensitive material is preferably a particulate material that is solid at room temperature. As a specific example, British Patent No. 1
Starch particles described in the specification of No. 232347, fine polymer powders described in the specification of US Pat. No. 3,625,736, etc., microcapsule particles containing no color former as described in the specification of British Patent No. 1,235,991, etc., and US Pat. No. 2,711,375. Examples include inorganic particles such as cellulose powder, talc, kaolin, bentonite, waxite, zinc oxide, titanium oxide, and alumina. The average particle size of the above particles is 3 to 50 μm in volume average diameter.
The range is preferably from 5 to 40 μm, and more preferably from 5 to 40 μm. As mentioned above, when the oil droplets of the polymerizable compound are in the form of microcapsules, it is more effective if the particles are larger than the microcapsules.

Binders that can be used in photosensitive materials can be contained in the photosensitive layer alone or in combination. It is preferable to use a mainly hydrophilic binder. Hydrophilic binders are typically transparent or translucent, such as gelatin, gelatin derivatives, cellulose derivatives, starch, gum arabic, etc. and synthetic polymeric materials such as water-soluble polyvinyl compounds such as polyvinyl alcohol, polyvinylpyrrolidone, and acrylamide polymers.

Other synthetic polymeric substances include dispersed vinyl compounds in the form of latexes, which increase the dimensional stability of photographic materials, among others. Incidentally, a photosensitive material using a binder is described in JP-A-61-69062. Furthermore, a photosensitive material using a binder together with microcapsules is described in JP-A-62-209525.

In the photosensitive layer of the photosensitive material, similar to the above-mentioned thermal polymerization initiator,
In addition to being used as a system to polymerize the polymerizable compound in the area where the silver halide latent image is not formed, the above-mentioned photopolymerization initiator is added for the purpose of polymerizing the unpolymerized polymerizable compound after image transfer. It's okay. A photosensitive material using a photopolymerization initiator is described in JP-A-62-161149.

When a solvent for a polymerizable compound is used in a photosensitive material, it is preferable to encapsulate it in a microcapsule separate from the microcapsule containing the polymerizable compound. In addition, is it miscible with the polymerizable compound encapsulated in the microcapsules?
Regarding photosensitive materials using IJ media, JP-A-62-20
There is a description in Publication No. 9524.

A water-soluble vinyl polymer may be adsorbed onto the silver halide grains described above. Regarding photosensitive materials using water-soluble vinyl polymers as mentioned above, Japanese Patent Application Laid-Open No. 63-9165
There is a description in Publication No. 2.

In addition to those mentioned above, examples of optional components that can be included in the photosensitive layer and how they are used can also be found in the application specifications for the above-mentioned series of photosensitive materials and Research Disclosure magazine Vol. 176. Described in No. 17029, June 1978 (pages 9-15).

The photosensitive layer of the photosensitive material comprising the above-mentioned components preferably has a pH value of 7 or less, as in the photosensitive material described in JP-A-62-275235.

A photosensitive material is formed by providing a photosensitive layer containing the above-mentioned components on a support. There are no particular restrictions on this support, but the same support as in the first embodiment is preferred.

In addition, when the support is made of a porous material such as paper, it is necessary to obtain a certain level of smoothness according to the waviness-based method, as in the case of the support used in the photosensitive material described in JP-A No. 62-209529. In addition, when a paper support is used, a paper support with low water absorption such as the photosensitive material described in JP-A-63-38934, a paper support as described in JP-A-6347754, etc. Paper support having a certain Bekk smoothness like a photosensitive material, JP-A-63-81339
A paper support with a low shrinkage rate like the photosensitive material described in the publication,
A paper support with low air permeability, such as the photosensitive material described in JP-A No. 63-81340, and a paper support with a pH value of 5 to 9, such as the photosensitive material described in JP-A No. 63-97941. etc. can also be used.

Layers that can be optionally provided on the photosensitive material include a heating layer, an antistatic layer, an anticurl layer, a release layer, a cover sheet or protective layer, a layer containing a base or a base precursor, a base barrier layer, and an antihalation layer. (colored layer), etc.

Regarding photosensitive materials using a heat generating layer, Japanese Patent Application Laid-open No. 1983
For photosensitive materials provided with a cover sheet or a protective layer, see JP-A No. 62-210447, and for photosensitive materials provided with a layer containing a base or base precursor, see JP-A No. 62-253140. A photosensitive material provided with a colored layer as an antihalation layer is described in JP-A-63-101842. Further, a photosensitive material provided with a base barrier layer is also described in the above-mentioned Japanese Patent Application Laid-Open No. 62-253140. Furthermore, examples of other auxiliary layers and their usage are also described in the applications relating to the above-mentioned series of light-sensitive materials.

Next, the image receiving material will be explained. A general image forming method using an image-receiving material or an image-receiving layer is described in JP-A-61-278849. .

As a support for the image-receiving material, in addition to the supports that can be used for the photosensitive materials described above, Balik paper can be used. In addition, when using a porous material such as paper as a support for the image-receiving material, Japanese Patent Application Laid-Open No. 62-209530
It is preferable that the image-receiving material has a certain level of smoothness as in the image-receiving material described in the above publication, and an image-receiving material using a transparent support is described in JP-A-62-209531.

Image-receiving materials generally have an image-receiving layer provided on a support.

The image-receiving layer can be constructed in any desired form using various compounds according to the coloring system of the color image-forming substance described above. In addition, when forming a polymer image on an image-receiving material, when a dye or a pigment is used as a color image-forming substance, the image-receiving material may be composed only of the above-mentioned support.

For example, when using a coloring system consisting of a color former and a color developer, the image receiving layer can contain the color developer. Furthermore, the image-receiving layer can also be configured as a layer containing at least one mordant. As the mordant, compounds known in the photographic technology and the like can be selected and used in consideration of conditions such as the type of the dark image forming substance. Note that, if necessary, two or more image-receiving layers may be constructed using a plurality of mordants having the same mordanting power.

The image-receiving layer preferably contains a polymer as a binder. As the binder, binders that can be used in the photosensitive layer of the photosensitive material described above can be used. Furthermore, a polymer with low oxygen permeability may be used as the binder, as in the image-receiving material described in JP-A-62-209454.

The image-receiving layer may contain a thermoplastic compound. When the image-receiving layer contains a thermoplastic compound, it is preferable that the image-receiving layer itself is constituted as an aggregate of fine particles of the aspirational compound. The image-receiving layer having the above structure has the advantage that it is easy to form a transferred image, and that a glossy image can be obtained by heating after image formation. The above thermoplastic compound is not particularly limited and can be arbitrarily selected from known plastic resins (plastics), waxes, and the like. However, the glass transition point of the thermoplastic resin and the melting point of the wax are preferably 200° C. or lower. Regarding the image-receiving material having an image-receiving layer containing thermoplastic compound fine particles as described above, Japanese Patent Application Laid-Open No. 62-28007
No. 1, 62280739 specification publication.

The image-receiving layer may contain a photopolymerization initiator or a thermal polymerization initiator. In image formation using an image receiving material,
The color image forming material is transferred together with the unpolymerized polymerizable compound as described below. Therefore, a photopolymerization initiator or a thermal polymerization initiator can be added to the image-receiving layer for the purpose of smoothly proceeding with the curing process (fixing process) of the unpolymerized polymerizable compound. Regarding an image receiving material having an image receiving layer containing a photopolymerization initiator, see JP-A-62-161149,
Image-receiving materials having an image-receiving layer containing a thermal polymerization initiator are described in JP-A-62-210444.

A dye or pigment can be included in the image-receiving layer for the purpose of writing characters, symbols, frames, etc. on the image-receiving layer, or for the purpose of making the background of an image a specific color. Further, for the purpose of easily distinguishing between the front and back sides of the image-receiving material, a dye or a pigment may be included in the image-receiving layer. Various substances known in the art can be used, but if the dye or pigment may impair the image formed in the image-receiving layer, the dye density of the dye or pigment may be lowered (e.g., reflection density 1 or less), or it is preferable to use a dye or pigment that has the property of decolorizing by heating or light irradiation.
An image-receiving material having an image-receiving layer containing a dye or pigment that has the property of being decolored by heating or light irradiation is described in JP-A-62-251741.

Furthermore, when a white pigment such as titanium dioxide or barium sulfate is added to the image-receiving layer, the image-receiving layer can function as a white reflective layer. When the image-receiving layer functions as a white reflective layer, the white pigment is used in an amount of 1Og per 1g of the thermoplastic compound.
It is preferable to use the amount in the range from 100g to 100g.

When the dye or pigment described above is contained in the image-receiving layer, it may be contained uniformly or unevenly distributed in a portion. For example, a part of the reflected image can be made into a projected image by forming the support described later from a material having light transmittance and including the white pigment in a part of the image-receiving layer.

By doing so, image information that is unnecessary in the projected image can also be written as a reflected image in the image-receiving layer portion containing the white pigment.

The image-receiving layer may be configured as two or more layers depending on the functions described above. Further, the layer thickness of the image-receiving layer is 1 to 1
It is preferably in the range of 00 μm, from 1 to 20 μm
More preferably, the range is within the range of .

Note that a retainer 3111 may be further provided on the image-receiving layer.

Furthermore, a layer made of aggregates of fine particles of a thermoplastic compound may be further provided on the image-receiving layer. An image-receiving material in which a layer made of aggregates of fine particles of a thermoplastic compound is further provided on the image-receiving layer is described in JP-A-62-210460.

Furthermore, a pressure-sensitive adhesive or a layer containing an adhesive and a release paper may be laminated in this order on the surface of the support opposite to the surface on which the image-receiving layer is provided. The sticker-like image receiving material having the above structure is disclosed in Japanese Patent Application Laid-open No. 63-24647 by the present applicant.
There is a description in the bulletin.

The method of using the photosensitive material will be described below.

First, the method of using the photosensitive material of the first embodiment will be described.

In the image recording method of the present invention, by heating without peeling after applying pressure, the core material is brought into contact with another component (color developer) as a zero-color image forming material to be transferred to the image receiving material. When a component (color former) that develops a color is used, the color developer may be included in the image-receiving material.

The image recording method of the present invention can be used to create printing plates by transfer as described in Japanese Patent Laid-Open Nos. 61-193155 and 61-281242.

Various means can be used as the exposure method of the present invention. In general, commonly used light sources such as sunlight, strobes, flashes, tungsten lamps, mercury lamps, halogen lamps such as iodine lamps, xenon lamps, laser beams, and CRT light sources, plasma light sources, fluorescent tubes,
A light emitting diode or the like can be used as a light source. It is also possible to use an exposure means that combines a microshack array using an LCD (liquid crystal) or PLZT (lanthanum-doped lead titanium zirconate) with a linear light source or a planar light source.

As a pressurizing method in the image forming method of the present invention, a conventionally known method can be used.

For example, the photosensitive material and the image-receiving material may be sandwiched between press plates such as a presser, pressure may be applied while conveying using a pressure roller such as a nip roll, or pressure may be applied intermittently using a dot impact device or the like.

Alternatively, highly pressurized air can be blown with an air gun or the like, or the pressure can be applied with an ultrasonic generator, a piezoelectric element, or the like.

Pressure is 400kg/co! It is preferable that it is below.

In the image forming method of the present invention, a conventionally known method can be used as the heating method.

For example, the image receiving material or photosensitive material may be brought into direct contact with a hot plate such as a hot plate or a drum, or may be heated while being conveyed using a heat roller.

Heating can also be performed using air heated to a high temperature, high frequency heating, or a laser beam.

Depending on the nature of the imaged material, heating can also be done using an infrared heater. Furthermore, a method of heating using overcurrent generated by electromagnetic induction can also be applied.

Alternatively, the imaged material may be heated in a bath containing a heated inert liquid, such as a fluorine-based liquid.

Furthermore, the image receiving material or the photosensitive material may be heated by providing a heat source separate from the above heating means, for example,
A layer of conductive particles such as carbon black or graphite may be provided in an image-receiving material or a photosensitive material, and the Joule heat generated when electricity is applied may be utilized.

The heating temperature is generally preferably in the range of 30°C to 300°C, more preferably in the range of 100°C to 250°C. Further, the heating time for −C is preferably in the range of 0.1 seconds to 100 seconds, and more preferably in the range of 1 second to 50 seconds.

If the material constituting the formed image is easily affected by air oxidation, it is effective to deaerate the area around the heating section or replace it with an inert gas during heating.

Next, a method of using the second embodiment of the photosensitive material will be described.

The photosensitive material can be used simultaneously with imagewise exposure or after imagewise exposure.
Perform development processing and use.

Although various exposure means can be used as the above-mentioned exposure method, a latent image of silver halide is generally obtained by imagewise exposure to radiation including visible light. The type of light source and amount of exposure
When dye sensitization is carried out with a long silver halide photosensitive wavelength,
It can be selected according to the sensitized wavelength) and anger level. Further, the original image may be a black and white image or a color image.

The photosensitive material is developed at the same time as the imagewise exposure or after the imagewise exposure.

In the image forming method of the present invention, a heat development process is performed.
This heat development treatment is described in JP-A-6169062.

As the heating method in the above heat development treatment, various conventionally known methods can be used. In addition, like the photosensitive material described in JP-A No. 61-294434,
A heating layer may be provided on the photosensitive material and used as a heating means.Also, as in the image forming method described in JP-A No. 62-210461, a heating layer may be provided on the photosensitive material while suppressing the amount of oxygen present in the photosensitive layer. A heat development treatment may also be performed. The heating temperature is generally from 50°C to 200°C, preferably from 60°C to 1
The range is up to 50°C. The heating time is generally 1°
It ranges from 1 second to 5 minutes, more preferably from 1 second to 1 minute.

Furthermore, as in the image forming method described in Japanese Patent Application No. 1-3282, the development is carried out in a state in which the photosensitive layer contains a liquid in the range of 10 to 400% by weight of the polymerizable compound.
In addition, the heat treatment may be performed at a temperature of 50° C. or higher.

Incidentally, instead of including the above-described base or base precursor in the photosensitive material, the development process may be carried out while or immediately after adding the base or base precursor to the photosensitive layer. As a method for adding a base or a base precursor, a sheet containing a base or a base precursor (
The method using a base sheet) is the easiest and preferable.
An image forming method using the above base sheet is described in JP-A-63-32546.

The photosensitive material can be thermally developed as described above to polymerize the polymerizable compound in the area where the silver halide latent image is formed or the area where the silver halide latent image is not formed. In light-sensitive materials, the polymerizable compound in the area where the silver halide latent image is formed is firstly polymerized in the heat development process described above.
As in the photosensitive material described in Japanese Patent No. 70836, by carefully controlling the type and amount of the reducing agent, it is also possible to polymerize the polymerizable compound in the area where the silver halide latent image is not formed.

In the manner described above, a polymer image can be obtained on the photosensitive layer of the photosensitive material. It is also possible to obtain dye images by fixing dyes or pigments to the polymer.

The polymer image or dye image thus obtained is transferred onto the image-receiving material by pressing the photosensitive material and the image-receiving material in a superimposed state and heating them without peeling them off. As for this pressurizing method and heating method, the same methods as those of the first embodiment described above are used.

After forming an image on the image-receiving material as described above, the image-receiving material may be heated as in the image forming method described in Japanese Patent Application Laid-Open No. 62-210459.

The above method also has the advantage that the unpolymerized polymerizable compound transferred onto the image-receiving material is polymerized and the storage stability of the obtained image is improved.

Photosensitive materials include black and white or color photosensitive materials, printing photosensitive materials, printing plates, X-ray photosensitive materials, medical photosensitive materials (for example, ultrasonic diagnostic machine CRTjll photosensitive materials), and computer graphic hard copy photosensitive materials. It has many uses, such as photosensitive materials for copying machines.

The present invention will be explained in more detail with reference to the following examples, but the present invention is not limited thereto.

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

[Example 1] [Preparation of photosensitive material (A)] Details of microcapsules 1 To 30 g of the following polymerizable compound, 2 g of Irgacure 651 (initiator, manufactured by Ciba Geigy) and Burgascript Red 1-6-B (color former) were added. , manufactured by Ciba Geigy) 3g
was dissolved. Furthermore, 12 g of Takenate D11ON (polyvalent isocyanate, manufactured by Narita Pharmaceutical Co., Ltd.) was added, mixed well, and the mixture was added to 130 g of a 4% aqueous solution of Metrose 65SH (methimecellulose, manufactured by Shin-Etsu Chemical Co., Ltd.), and the mixture was heated at 5.00 rpm using a homogenizer. The mixture was emulsified and dispersed for 1 minute. Add 20g of 2% diethylenetriamine aqueous solution to this emulsion,
Stirred at room temperature for 30 minutes. The mixture was further stirred at 40° C. for 90 minutes to obtain a polyurea microcapsule liquid containing a polymerizable compound and a coloring agent. The average particle size was 8μ.

Add 5 g of the above-mentioned microcapsule liquid to 5 g of a 5% aqueous solution of PVA205 (manufactured by Ri-7shin), mix well, apply on a polyethylene terephthalate sheet with a thickness of 100 μm at a coating amount of 70 g/rd, and dry. A photosensitive material (A) that can be used in the image recording method of the present invention was obtained.

[Preparation of image-receiving material] 11 g of a 40% sodium hexametaphosphate aqueous solution was added to 125 g of water, and further, 34 g of zinc 3,5-α-methylbenzyl salicylate and 82 g of a 55% by weight calcium carbonate slurry were mixed therewith. , and coarsely dispersed with a mixer. The liquid was dispersed using a Dyno Mill disperser, and 112 g of an 8% polyvinyl alcohol water TL solution was added to 200 g of the obtained liquid and mixed uniformly. Further, 10 ml of water was added to this mixed solution to prepare a coating solution for forming an image-receiving layer.

Then, the coating solution was applied to a paper support (with a basis weight of 55 g/n).
As the fiber length distribution defined by JISP-8207, weight% of 24 mesh residue and weight% of 42 mesh residue
A paper support using a base paper having a fiber length distribution such that the sum of
(see Japanese Patent Publication No. 2003-111002)) and then dried at 60° C. to prepare an image-receiving material.

[Both image formation and evaluation] Photosensitive material (A) was heated to 30C using a 200W high-pressure mercury lamp.
Imagewise exposure was carried out for 2 seconds from the IH distance. Next, it was layered with an image-receiving material, passed through a pressure roller of 300 kg/cd, and immediately heated to 160° C. without peeling. When the photosensitive material and the image-receiving material were peeled off, both magenta positive images were formed on the image-receiving material. I got it. The maximum magenta density obtained was measured using a Macbeth reflection densitometer.

In addition, it was visually evaluated whether white spots appeared due to poor peeling on the positive image on the image-receiving material.

The results are shown in Table 1 below.

[Example 2] [Preparation of photosensitive material (B)] Co-1 of microcapsule 2 Polymerizable compound used in [Preparation of photosensitive material (A)], 1
Into 5.4 g, 1.0 g of an initiator and 1.6 g of a color former were dissolved, and 1.8 g of methylene chloride was further added to obtain a photosensitive composition.

18.6% aqueous solution of isopane (manufactured by Kuraray ■) 10.51
g, add 48°56 g of a 2.89% aqueous solution of pectin,
The above photosensitive composition was added to an aqueous solution adjusted to pH 4.0 using 10% sulfuric acid, and the mixture was heated to 70% using a homogenizer.
The photosensitive composition was stirred at 0.00 rpm for 2 minutes to emulsify the photosensitive composition in the aqueous solvent.

To 72.5 g of this aqueous emulsion, 8.32 g of urea 40% aqueous solution was added.
g, 2.82 g of resorcinol 11.3% aqueous solution, 8.56 g of formalin 37% aqueous solution, ammonium sulfate 8.00
% aqueous solution was added one after another, and heating was continued at 60° C. for 2 hours while stirring.

Then adjust the pH to 7 using a 10% aqueous sodium hydroxide solution.
．． 3, and 3.62 g of a 30° 9% aqueous solution of sodium bisulfite was added to prepare a microcapsule liquid.

50.0 g of the microcapsule solution prepared as above (B)
, Emmalex NP-8 (manufactured by Nippon Emulsion ■) 1
Add 5.0 g of 0% aqueous solution and 45 g of water, coat on 100 μm thick polyethylene terephthalate at a coating weight of 74 g/nf, and dry to obtain a photosensitive material (B) that can be used in the image forming method of the present invention. Ta.

[Image Formation and Evaluation] Using the photosensitive material (B), an image forming method was carried out and evaluated in the same manner as in Example 1.

The results are shown in Table 1 below.

[Comparative Example 1] Image formation in [Example 1] was carried out using the photosensitive material (A) obtained in [Example 1] and an image-receiving material.

Instead of passing the photosensitive material and the image-receiving material through a pressure roller of 300 kg/-, immediately heating them to 160°C without separating them, and then peeling the photo-sensitive material and the image-receiving material, the photo-sensitive material and the image-receiving material are stacked and heated at 300 kg/cv&. An image forming method was carried out and evaluated in the same manner as in [Example 1], except that the photosensitive material and the image-receiving material were peeled off after being passed through a pressure roller and heated to 160° C. at the same time.

The results are shown in Table 1 below.

[Comparative Example 2] Using the photosensitive material (B) obtained in [Example 2] and an image-receiving material, an image forming method was performed and evaluated in the same manner as in [Comparative Example 1].

The results are shown in Table 1 below.

E Comparative Example 3 Image formation in [Example 1] was carried out using the photosensitive material (A) and image-receiving material obtained in [Example 1]. 300k
Pass it through a pressure roller of g/aJ and immediately apply 1 without peeling.
An image forming method was carried out in the same manner except that instead of separating the photosensitive material and image receiving material after heating to 60° C., they were passed through a 300 kg/- pressure roller and separated by 11 degrees for image evaluation. was conducted and evaluated.

The results are shown in Table 1 below.

[Comparative Example 4] Using the photosensitive material (B) obtained in [Example 2] and an image-receiving material, an image forming method was carried out and evaluated in the same manner as in [Comparative Example 3].

The results are shown in Table 1 below.

In the column of "Poor peeling" in Table 1, rOJ means that almost no peeling defects were observed, and rXJ means that peeling defects were observed.

(The same meaning applies to Table 2 below.) As is clear from the results shown in Table 1, when the image forming method of the present invention is implemented, compared to transfer using only pressure, It can be seen that a high concentration was obtained, and that the peeling defects that were observed when applying pressure and heating at the same time were improved.

[Example 3] [Preparation of photosensitive material (C)] Preparation of halogen (c-1) Gelatin aqueous solution (16 g of gelatin in 1500 mj of water!
Add 0.5 g of sodium chloride and adjust the pH to 3 with IN sulfuric acid.
.
Water 300mj! 0.59 mol of silver nitrate dissolved therein) was simultaneously added at an equal flow rate over 50 minutes. One minute after this was completed, 43ml of a 1% methanol solution of the following sensitizing dye (1) was added. was added, and after addition of the sensitizing dye, 15
100ml of an aqueous solution containing 2.9g of potassium iodide from min.
1 and a silver nitrate aqueous solution (0.018 mol of silver nitrate dissolved in 100 mf of water) were simultaneously added over 5 minutes. To this emulsion, 1Qcc of a 10% alkaline aqueous solution of isobutylene maleic anhydride copolymer was added to precipitate the emulsion, washed with water and desalted, then 12g of gelatin was added and dissolved, and further 0.5μ of sodium thiosulfate was added and the mixture was heated to 60°C. Chemical aggregation was carried out for 15 minutes to prepare 1000 g of a monodispersed 14-hedral silver iodobromide emulsion (C-1) having an average grain size of 0.22 μm.

Sensitizing dye (1) Gelatin aqueous solution (20 g gelatin in 1600 ml of water)
Add 0.5g of sodium chloride and adjust the pH to 3 with IN sulfuric acid.
, 2 and kept at 42°C), 200 mN of an aqueous solution containing 71 g of potassium bromide and a silver nitrate aqueous solution (
0.59 mol of silver nitrate dissolved in 200 ml of water was simultaneously added at an equal flow rate over 30 minutes. One minute after this was completed, 48 ml of a 1% methanol solution of the following sensitizing dye (2) was added, and 100 ml of an aqueous solution containing 2.9 g of potassium iodide was added 10 minutes after the addition of the sensitizing dye (2).
and a silver nitrate aqueous solution (0.018 mol of silver nitrate dissolved in 100 ml of water) were simultaneously added over a period of 5 minutes. This emulsion contains 1 of isobutylene maleic anhydride copolymer.
After adding 10cc of 0% alkaline aqueous solution to precipitate, washing with water and desalting, 18g of gelatin was added and melted, and further, 0.7μ of sodium thiosulfate was added and the mixture was incubated at 60°C for 15
Chemical sensitization was carried out for a minute to prepare a monodispersed 14-hedral silver iodobromide emulsion (C-2) IQOQg having an average grain size of 0.12 μm.

Sensitizing dye (2) Gelatin aqueous solution (add 20 g of gelatin and 0.5 g of sodium chloride in 1600 mf of water, and adjust the pH to 3 with IN sulfuric acid.
5 and kept warm at 45℃) and potassium bromide 7.
200 ml of an aqueous solution containing 1 g of silver nitrate and an aqueous silver nitrate solution (0.59 mol of nitrate dissolved in 200 mj of water) were simultaneously added at equal flow rates over a period of 30 minutes. One minute after this is completed, 0.00% of the following sensitizing dye (3) is applied.
5% methanol solution 43'm7! 15 minutes after addition of the sensitizing dye, 100 ml of an aqueous solution containing 3.65 g of potassium iodide and an aqueous silver nitrate solution (100 nl of water) were added.
! 310.022 moles of nitric acid dissolved in the solution) was simultaneously added over a period of 5 minutes. To this emulsion was added 10 c of a 10% alkaline aqueous solution of isobutylene maleic anhydride copolymer.
After adding c and sedimentation, washing with water and desalting, 10g of gelatin was added and dissolved, and sodium thiosulfate was added to 0.
．． 45■ In addition, chemical sensitization was performed at 55°C for 20 minutes to reduce the average particle size to 0. 1000 g of a 13 μm monodisperse dodecahedral silver iodobromide emulsion (C-3) was prepared.

Aggravating dye (3) To 83 g of the above-mentioned polymerizable compound (C-1), 0.7 g of the following copolymer was added.
7 g and 12.5 g of the yellow imaging material described below were dissolved. Furthermore, 6.4 g of the following reducing agent (1), 6.1 g of the following reducing agent (n), 0.09 g of the following development inhibitor release precursor, and 0.0 g of the following mercapto compound. 1.8 g of Emarex NP8 (manufactured by Nippon Emulsion ■) were added thereto, and 20 g of methylene chloride was further added to form a homogeneous solution.

On the other hand, 1.5 mj of a 10% aqueous solution of potassium bromide was added to 15 g of the above-mentioned silver halide emulsion (C-1)! and 0.08% 1-methoxy-2- of the reducing agent (III) below.
0.5 mA of methylpropanol solution was added and stirred for 5 minutes. Further, 1.5 ml of a 1% aqueous solution of polyvinylpyrrolidone (K-15) was added and stirred for 5 minutes. This mixed solution containing the silver halide emulsion was added to the above homogeneous solution and stirred for 5 minutes at 15,000 revolutions per minute using a homogenizer to form a photosensitive composition (C-
1) was obtained.

(copolymer) (CH2C)a.

CO□CgHs (Reducing agent port)) zHs (Reducing agent (■)) (Reducing agent (■)) (CHgC)-z.

Cot CHI C1h 0H CI-1□CH,SH (Development inhibitor release precursor) (Mercapto compound) Silver halide emulsion (C-2) used in the preparation of the above photosensitive composition (C-1) In place of 1), use the same amount of the above silver halide emulsion (C-2), in place of the yellow image forming substance, use 20 g of the following magenta image forming substance, and use 0.015 g of the above development accelerator. The photosensitive composition (C-1) was prepared in the same manner as the photosensitive composition (C-1) except that
2) was prepared.

(Magenta image-forming substance) In place of the silver halide emulsion (C-1) used in the preparation of the photosensitive composition (C-1), the same amount of the silver halide emulsion (C-3) was used to form a yellow image. A photosensitive composition (C-3) was prepared in the same manner as the photosensitive composition (C1) except that 16 g of the following cyan image forming substance and 0.0075 g of the above development accelerator were used instead of the forming substance. was prepared.

(Cyan image forming substance) Sodium salt of polyvinylbenzenesulfonic acid (Ver.
sa TL 502, manufactured by National Starch Co., Ltd.) 10
The pH of 210 g of the 10% aqueous solution was adjusted to 6.0 using a 10% aqueous solution of sodium hydroxide. On the other hand, 4.5 g of DllON (polyvalent isocyanate compound, manufactured by Narita Pharmaceutical Co., Ltd.) was added to the photosensitive composition (C-1), and this was added to the aqueous solution. Heat the mixture to 40°C,
A W10/W emulsion was obtained by stirring for 30 minutes at 9000 rpm using a homogenizer.

Separately, melamine 13.20g and formaldehyde 37%
21.6 g of an aqueous solution and 70 g of distilled water were added, heated to 60° C., and stirred for 30 minutes to obtain a transparent aqueous solution of melamine/formaldehyde initial condensate.

77 g of an aqueous solution of this initial condensate was added to the above W10/W emulsion, and the pH was adjusted using a 20% aqueous solution of phosphoric acid.
was adjusted to 6.0 and then heated to 60°C,
After stirring for 90 minutes, 27 g of a 40% aqueous solution of urea was added, and the pH was adjusted to 3.5 using the same 20% aqueous solution of phosphoric acid, followed by stirring for 40 minutes. Finally, the PAL was adjusted to 6°5 using a 10% aqueous solution of sodium hydroxide, cooled to room temperature, and the photosensitive microcapsule liquid (C-1
) was prepared.

Preparation of microcapsules (C-2) In the preparation of the photosensitive microcapsule dispersion (C-1), the photosensitive composition (C-2) is used instead of the photosensitive composition (C-1). A photosensitive microcapsule dispersion (C-2) was prepared in the same manner except for the following.

In the preparation of the photosensitive microcapsule dispersion (C-1) of the microcapsules (C-3), the photosensitive composition (C-3) is used instead of the photosensitive composition (C-1). A photosensitive microcapsule dispersion (C-3) was prepared in the same manner except for the following.

Precursor Add 20 g of the following base precursor to 80 g of a 4% aqueous solution of polyvinyl alcohol (PVA-205, manufactured by Kuraray), and use a Dynomill to prepare the mixture with an average particle size of 2 μm at 20°C.
A base precursor solid dispersion was prepared by dispersing the following:

(Base precursor) Photosensitive microcapsule liquid (C
-1), (C-2) and (C-3>, respectively, 16 g of (C-1), 18.5 g of (C-2), (C-
3), 6.8 g of the above base precursor solid dispersion, 9 mp of a 20% aqueous solution of sorbitol, and I Q ml of a lθ% aqueous starch solution were mixed. To this mixture, add 4 ml of a 5% aqueous solution of the following surfactant.
and water were added to make a total amount of 74 g of a coating solution.

This coating liquid was applied to a polyethylene terephthalate sheet with a thickness of 100 μm at a coating amount of 50 g/rd, and the coating amount was approximately 6
The photosensitive material (C) according to the present invention was prepared by drying at 0°C.

(Surfactant) [Image formation and its evaluation] Using a tungsten light bulb, the photosensitive material (C) was
After exposure at 2000 lux for 1 second each through a gray continuous filter with a continuous i3 overdensity of , it was heat developed at 155°C.

Next, in the same manner as [Example 1], the photosensitive material (C) and the image-receiving material were stacked, passed through a 300 kg/- pressure roller, heated immediately to 160°C without peeling, and then the photosensitive material and the image-receiving material were peeled off. As a result, a gray positive image was obtained on the image receiving material. The maximum gray density obtained was measured using a Macbeth densitometer. In addition, the appearance of poor peeling was visually evaluated.

The results obtained are shown in the second table below.

[Comparative Example 5] Using the photosensitive material (C) obtained in [Example 3] and an image-receiving material, the addition of 300 kg/cd performed during image formation in [Example 3] was applied. Instead of passing the material through a pressure roller and immediately heating it to 160°C without peeling it, and then peeling off the photosensitive material and image-receiving material, it is possible to pass it through a pressure roller of 300 kg/cj and heat it to 160°C at the same time. The image forming method was carried out and evaluated in the same manner as in [Example 3] except that the film was peeled off.

The results are shown in Table 2 below.

[Comparative Example 6] Using the photosensitive material (C) and image-receiving material obtained in [Example 3], the above-mentioned [3
300 kg/- instead of passing it through a pressure roller of 300 kg/-, heating it to 160°C immediately without peeling it, and then peeling it off.
The image forming method was carried out and evaluated in the same manner except that the image was evaluated after being passed through a pressure roller of kg/(-11) and then peeled off. The results are shown in Table 2 below.

Table 2 Procedure Amendment As is clear from the results shown in Table 2, when the image forming method of the present invention is implemented, higher density can be obtained compared to transfer using only pressure, and It can be seen that the peeling defects that were observed when applying pressure and heating at the same time were also improved.

1゜ Display of incidents Heisei Special Application No. IO Tata No. 72 2. Name of the invention 3. Person who makes corrections Relationship with the incident address Image forming method

Claims (2)

[Claims] (1) After imagewise curing the polymeric composition of a photosensitive material having microcapsules containing a polymerizable composition on a support, it is superimposed on an image-receiving material, and after applying pressure, in the superimposed state, An image forming method characterized by heating to a temperature in the range of 30°C to 300°C without peeling. (2) A photosensitive material containing microcapsules containing a polymerizable compound, silver halide, and a reducing agent is imagewise exposed on a support to form a latent image of silver halide, and simultaneously with the imagewise exposure or After exposure, development is performed, and the image-receiving material is superimposed on the developed photosensitive material and pressurized.
An image forming method characterized by heating to a temperature in the range of °C.