JPH0242444A - Photosensitive material - Google Patents

Abstract

PURPOSE:To obtain a sharp image having high contrast by incorporating a reducing agent into the photosensitive layer on the outside of microcapsules as well, thereby polymerizing the unpolymerized polymerizable compd. remaining in the part where the latent image of silver halide is formed. CONSTITUTION:The reducing agent is incorporated into the photosensitive layer on the outside of the microcapsules of the photosensitive material formed by having the photosensitive layer contg. the silver halide, the reducing agent and the polymerizable compd. on a base and incorporating the polymerizable compd. and the reducing agent in the state of housing the same in the microcapsules into the photosensitive layer. The polymn. reaction of the polymerizable compd. bleeding out of the microcapsules is progressed in the same manner as in the microcapsules in this way and the unpolymerized polymerizable compd. is completely removed form the part where the latent image of the silver halide is formed. The extremely sharp image having the high contrast is thus obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a photosensitive material having a photosensitive layer containing silver halide, a reducing agent, and a polymerizable compound on a support.

[Background of the Invention] A photosensitive material having a photosensitive layer containing silver halide, a reducing agent, and a polymerizable compound on a support is used in an image forming method in which a latent image of silver halide is formed and a polymerizable compound is polymerized. can be used.

Examples of image forming methods include methods described in Japanese Patent Publication Nos. 11149/1982, 20741/1982, 10697/1987, 138632/1980, and 169143/1980. . In Kowara's method, when the silver halide in the imagewise exposed photosensitive layer is developed using a developer, the coexisting reducing agent is oxidized, and at the same time, coexisting polymerizable compounds (e.g., vinyl compounds) are oxidized. ) is polymerized to form a polymer (high molecular compound) in an imagewise manner. 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 discloses a method in which a polymer compound can be formed by dry treatment. This method uses a photosensitive silver salt (
A latent image of a photosensitive silver salt is formed by imagewise exposing a recording material (photosensitive material) comprising a photosensitive layer comprising silver halide (silver halide), a reducing agent, a crosslinkable compound (polymerizable compound), and a binder supported on a support. by forming and then heating it,
This is a method in which a polymer (high molecular compound) is formed in the area where the latent image has been formed.

In the photosensitive material as described above, the silver halide, the polymerizable compound, and the reducing agent can be contained in the photosensitive layer in a state of being accommodated in microcapsules. In this way, photosensitive materials using microcapsules provide clear images with high sharpness. Regarding photosensitive materials using microcapsules, see JP-A-61-73145 and JP-A-61-275.
No. 742, No. 61-278849, No. 62-1691
No. 47 and No. 62-183451.

[Summary of the Invention] A photosensitive material using microcapsules provides clear images with high sharpness as described above. However, when the present inventor closely observed the obtained image, it was found that a small amount of unpolymerized polymerizable compound remained in the area where the latent image of silver halide was formed, where the polymerization reaction should proceed. There is. The polymerizable compound remaining in the area where the silver halide latent image was formed is
This may cause a decrease in image contrast or smearing.

An object of the present invention is to provide a photosensitive material that provides a clearer image with high contrast.

The present invention has a photosensitive layer containing silver halide, a reducing agent, and a polymerizable compound on a support, and the photosensitive layer contains the polymerizable compound and the reducing agent in microcapsules. The present invention provides a photosensitive material characterized in that the photosensitive layer outside the microcapsules also contains a reducing agent.

The photosensitive material of the present invention preferably has the following embodiments.

(1) Silver halide is contained in microcapsules.

(2) The reducing agent contained in the photosensitive layer outside the microcapsule is a hydrazine derivative.

(3) The reducing agent contained in the photosensitive layer outside the microcapsule is a hydrazine derivative represented by the following formula (I) or (II).

Door R' -NH-NH-C-R2 (I) [Formula (I) above
and (II), R1 is a monovalent group selected from the group consisting of an alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, an alkenyl group, an alkynyl group, and a heterocyclic group (6 groups are one or more substituents) R2 is a hydrogen atom, an alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, an alkenyl group, an alkynyl group, a heterocyclic group, an alkoxy group, an aryloxy group, an alkylthio group, R3 is a monovalent group selected from the group consisting of an arylthio group and an amino group (6 groups may have one or more substituents); R3 is an aryl group or a heterocyclic group (6 groups may have one or more substituents); R4 and R5 are each an aryl group (which may have - or more substituents); and R6 is a hydrogen atom, an alkyl (6 groups may have one or more substituents)] (4) Photosensitivity of the outside of the microcapsule The reducing agent contained in the layer is a hydrazine derivative represented by the following formula (III).

[In the above formula (III), R7 is a monovalent group selected from the group consisting of a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkynyl group, and a heterocyclic group (6 groups are may have one or more substituents; R8 and R9 are each an aryl group (may have - or more substituents); or R8
and R9 together with adjacent carbon atoms form a fused aromatic group; and RIO is a monovalent group selected from the group consisting of an aryl group, a heterocyclic group, a hydrogen atom, an alkyl group, an alkoxycarbonyl group, and a carbamoyl group. group (6 groups may have one or more substituents)] (5) The reducing agent is contained in the photosensitive layer outside the microcapsule in the form of a solid dispersion.

(6) A reducing agent is contained in the photosensitive layer outside the microcapsule in the form of a solid dispersion with an average particle size of 0.01 to 5 μm.

(7) The amount of reducing agent contained in the photosensitive layer outside the microcapsules is 1 to 50 mol% relative to the amount of reducing agent contained in the microcapsules.

(8) The amount of reducing agent contained in the microcapsules is 0.1 to 15% of the total amount of silver contained in the photosensitive layer.
00 mol%.

(9) A non-photosensitive silver salt is contained in the photosensitive layer outside the microcapsule.

(10) A non-photosensitive silver salt is contained in the photosensitive layer outside the microcapsule in an amount of 0.01 to 50 mol% based on silver halide.

[Effects of the Invention] According to research conducted by the present inventors, a trace amount of unpolymerized polymerizable compounds remaining in the area where the silver halide latent image is formed is removed from the microcapsules during storage or thermal development of the photosensitive material. It became clear that it had seeped out.

In a photosensitive material in which a reducing agent is contained in microcapsules, the polymerization reaction of the polymerizable compound that seeps out from the microcapsules does not proceed sufficiently.

The photosensitive material of the present invention is characterized in that the photosensitive layer outside the microcapsules also contains a reducing agent. Due to the action of this reducing agent, the polymerizable compound exuded from the microcapsules can undergo polymerization and reaction in the same manner as inside the microcapsules. As a result, the unpolymerized polymerizable compound is almost completely removed from the area where the silver halide latent image is formed. Therefore, the photosensitive material of the present invention provides very clear images with high contrast.

[Detailed Description of the Invention] The reducing agent that can be used in the photosensitive material of the present invention has a function of reducing silver halide and a function of promoting polymerization of a polymerizable compound. However, at least two types of reducing agents each having the above two functions may be used in combination.

There are various types of reducing agents having the above functions. The reducing agents include hydroquinones, catechols, p-aminophenols, p-furniunindiamines, 3-pyrazolidones, 3-aminopyrazoles, 4
-amino-5-pyrazolones, 5-aminouracils,
4.5-dihydroxy-6-aminopyrimidines, reductones, amyl reductones, 0- or p-sulfonamidophenols, 0- or p-sulfonamidonaphthols, 2-sulponamidoindanones, 4-
Sulfonamide-5-pyrazolones, 3-sulfonamide indoles, sulfonamide pyrazolobenzimidazoles, sulfonamide pyrazolotriazoles, α
- Sulfonamide ketones, hydrazines, etc.

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.
No. 1-228441, No. 62-86354, No. 62-
No. 86355, No. 62-264041, No. 62-19
There are descriptions in each publication of No. 8849 (including those described as a developer or a hydrazine derivative). Regarding the above-mentioned reducing agent, please refer to "The Theor" by T. James.
y of the Photographic Pro
cess'' 4th edition, pp. 291-334 (1977),
Research Disclosure Magazine V.

1, 170. No. 17029 of June 1978 (9-1
5), and also in the same magazine Vol. 1.176, No. 17643 (pages 22-31), December 1978. Furthermore, as in the photosensitive material described in JP-A No. 62-210466, 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. good. The photosensitive material in the present invention also includes:
The reducing agents and reducing agent precursors described in each of the above specifications and literature can be effectively used. Therefore, the r-reducing agent J in this specification includes the reducing agents and reducing agent precursors described in each of the above-mentioned publications and literature.

These reducing agents may be used alone, or two or more types of reducing agents may be used in combination. When two or more types of reducing agents are used together, the interaction of the reducing agents is, first, to promote the reduction of silver halide (and/or organic silver salt) through so-called superadditivity; , causing polymerization of the polymerizable compound via a redox reaction with other reducing agents coexisting with an oxidized form of the first reducing agent generated by reduction of silver halide (and/or organic silver salt); etc. are possible. However, in actual use, the reactions described above can occur simultaneously, so it is difficult to specify which effect is occurring.

Specific examples of the reducing agent include pentadecylhydroquinone, 5-t-butylcatechol, P-(N,N-diethylamino)phenol, 1-phenyl-4-methyl-
4-hydroxymethyl-3-pyrazolidone, 1-phenyl-4-methyl-4-heptadecylcarbonyloxymethyl-3-pyrazolidone, 2-phenylsulfonylamino-4-hexadecyloxy-5-t-octylphenol, 2-phenylsulfonyl Amino-4-7-butyl-
5-hexadecyloxyphenol, 2-(N-butylcarbamoyl)-4-phenylsulfonylaminonaphthol, 2-(N-methyl-N-octadecylcarbamoyl)-4-sulfonylaminonaphthol, 1-acetyl-2-phenylhydrazine , 1-acetyl-2-((
p or 0)-aminophenyl)hydrazine, 1-formyl-2-((p or 0)-aminophenyl)hydrazine, 1-acetyl-2-((p or O)-methoxyphenyl)hydrazine, ! -Lauroyl-2-((p or 0)-aminophenyl)hydrazine, 1-trityl-2-(2,6-dichloro-4-cyanophenyl)hydrazine, 1-trityl-2-phenylhydrazine, 1-
Phenyl-2-(2,4,6-dolichlorophenyl) and drazine, 1-(2-(2,5-di-t-pentylphenoxy)butyroyl)-2-((p or 0)-aminophenyl) Hydrazine, 1-(2-(2,5-di-
t-pentylphenoxy)butyroyl)-2-((p or o)-aminophenyl)hydrazine pentadecylfluorocaprylate, 3-indazolinone, 1-(3
,5-dichlorobenzoyl)-2-phenylhydrazine, 1-trityl-2-[((2-N-butyl-N-octylsulfamoyl)-4-methanesulfonyl)phenylcohydrazine, 1-(4-( 2,5-di-t-pentylphenoxy)butyroyl)-2-((p or 0)-
methoxyphenyl)hydrazine, 1-(methoxycarbonylbenzohydryl)-2-phenylhydrazine, 1-
formyl-2-[4-(2-(2,4-di-t-pentylphenoxy)butyramido)phenyl]hydrazine,
1-acetyl-2-[4-(2-(2,4-di-t-pentylphenoxy)butyramido)phenyl 1-hydrazine, 1-trityl-2-[(2,6-dichloro-4-(
N.

N-di-2-ethylhexyl)carbamoyl)phenylcohydrazine, 1-(methoxycarbonylbenzohydryl)-2-(2,4-dichlorophenyl)hydrazine,
1-Trityl-2-[(2-(N-ethyl-N-octylsulfamoyl)-4-methanesulfonyl)phenyl]hydrazine, l-benzoyl-2-tritylhydrazine, 1-(4-butoxybenzoyl)- 2-Tritylhydrazine, 1-(2,4-dimethoxybenzoyl)-2
-) lytylhydrazine, 1-(4-dibutylcarbamoylbenzoyl)-2-tritylhydrazine, and 1-
(1-naphthoyl)2-tritylhydrazine and the like can be mentioned.

In the photosensitive material of the present invention, a reducing agent is contained not only inside the microcapsules but also in the photosensitive layer outside the microcapsules. The reducing agent contained in the photosensitive layer outside the microcapsules may be the same as or different from the reducing agent inside the microcapsules. However, the reducing agent contained in the photosensitive layer outside the microcapsules is preferably a hydrazine derivative.

The reducing agent contained in the photosensitive layer outside the microcapsules is particularly preferably a dorazine derivative represented by the following formula (I), (■) or <m). The hydrazine derivative represented by the following formula CI) or (II) is described in JP-A No. 62-264041 as the hydrazine derivative represented by the following formula (I).
The hydrazine derivative represented by II) is disclosed in JP-A-62-
Each of these is described in Japanese Patent No. 198849.

R' -NH-NH-C-R2 (I) R1 in the above formula (I) is selected from the group consisting of an alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, an alkenyl group, an alkynyl group, and a heterocyclic group. One group (6 groups may have one or more substituents). Particularly preferred are alkyl groups, aralkyl groups and heterocyclic groups.

Examples of the alkyl group constituting R1 include methyl group, ethyl group, n-butyl group, hexyl group, 2-ethylhexyl group, decyl group, undecyl group, dodecyl group, hexadecyl group, octadecyl group, and 2-methoxyethyl group. , 2-
Examples include chloroethyl group and furfuryl group. The alkyl group preferably has 1 to 20 carbon atoms.

Examples of the cycloalkyl group include a cyclopentyl group and a cyclohexyl group. The cycloalkyl group preferably has 5 to 10 carbon atoms.

Examples of the aralkyl group include diphenylmethyl group, benzyl group, furfuryl group, and 1-phenylethyl group. The number of carbon atoms in the aralkyl group is preferably 7 to 20.

Examples of aryl groups include phenyl group, tolyl group, xylyl group, methoxyphenyl group, dimethoxyphenyl group,
2-methoxy-4-methylphenyl group, naphthyl group, 2
-methoxynaphthyl group and the like. The number of carbon atoms in the aryl group is preferably 6 to 20.

Examples of alkenyl groups include propenyl, butenyl, and styryl groups.

The alkenyl group preferably has 2 to 20 carbon atoms.

Examples of alkynyl groups include propargyl group and phenylethynyl group. The number of carbon atoms in the alkynyl group is preferably 2 to 20.

Examples of heterocyclic groups include 4-ethoxyphthalazino group, benzothiazolyl group, quinolyl group, penzochromalyl group,
Examples include pyridyl group, imidazolyl group, and indolyl group.

R2 in the above formula (I) is a hydrogen atom, an alkyl group,
One group selected from the group consisting of cycloalkyl group, aralkyl group, aryl group, alkenyl group, alkynyl group, heterocyclic group, alkoxy group, aryloxy group, alkylthio group, arylthio group, and amino group (6 groups is one or more may have a substituent). Particularly preferred are alkyl groups, aralkyl groups, aryl groups, alkenyl groups, alkynyl groups and heterocyclic groups.

Examples of the alkyl group constituting R2 include methyl group, trifluoromethyl group, trichloromethyl group, t-butyl group, heptyl group, pentadecafluoroheptyl group, 3-
(2,4-t-pentylphenoxy)propyl group and the like can be mentioned. The alkyl group preferably has 1 to 20 carbon atoms.

Examples of cycloalkyl groups include cyclohexyl groups. The number of carbon atoms in the cycloalkyl group is preferably 5 to 1 o.

Examples of aralkyl groups include benzyl group, diphenylmethyl group, and the like. The number of carbon atoms in the aralkyl group is preferably 7 to 20.

Examples of aryl groups include phenyl group, dichlorophenyl group, methoxycarbonylphenyl group, tolyl group, 4-
Examples include cyanophenyl group and naphthyl group. The number of carbon atoms in the aryl group is preferably 6 to 20.

Examples of alkenyl groups include styryl group, propenyl group, butenyl group, and the like.

The alkenyl group preferably has 2 to 20 carbon atoms.

Examples of the alkynyl group include phenylethynyl group, propargyl group, and the like. The number of carbon atoms in the alkynyl group is preferably 2 to 20.

Examples of the heterocyclic group include a pyridyl group, a benzimidazolyl group, a quinolyl group, a thienyl group, a furyl group, a benzothiazolyl group, a benzochromanyl group, and the like.

Examples of alkoxy groups include trifluoroethoxy group,
Examples include 2-methoxyethoxy group. The number of carbon atoms in the alkoxy group is preferably 1 to 20.

Examples of the aryloxy group include a phenoxy group and a 4-cyanophenoxy group. The aryloxy group preferably has 6 to 20 carbon atoms.

Examples of alkylthio groups include n-butylthio group, n-
Examples include octylthio group and dodecylthio group. The number of carbon atoms in the alkylthio group is preferably 1 to 20.

Examples of arylthio groups include phenylthio groups. The number of carbon atoms in the arylthio group is preferably 6 to 20.

R3-NH-NH-C-R5 (■) R3 in the above formula (II) is an aryl group or a heterocyclic group (6 groups may have one or more substituents). Preferably, the heterocyclic group has aromaticity.

Examples of aromatic or heterocyclic compounds constituting R3 include benzene, naphthalene, anthracene, pyridine,
Examples include imidazole, benzimidazole, benztriazole, thiazole, benzthiazole, phthalazine, quinoline, and isoquinoline. Particular preference is given to benzene, naphthalene, thiazole and phthalazine.

Examples of substituents for the aryl group or heterocyclic group constituting R3 include alkyl groups (e.g., methyl group, ethyl group, butyl group, t-butyl group, t-amyl group, 2-ethylhexyl group, t-octyl group) group, nonyl group, dodecyl group, octadecyl group), aryl group (e.g., phenyl group, tolyl group), aralkyl group (e.g., benzyl group, diphenylmethyl group), halogen atom (e.g., fluorine, chlorine, bromine), Alkoxy groups (e.g., methoxy, ethoxy, 2-methoxyethoxy, benzyloxy, octyloxy, octadecyloxy), aryloxy (e.g., phenyloxy), alkylsulfonyl (e.g., methylsulfonyl) , ethylsulfonyl group, butylsulfonyl group, benzylsulfonyl group, octylsulfonyl group, dodecylsulfonyl group, octadecylsulfonyl group), arylsulfonyl group (e.g. benzenesulfonyl group), cyano group, carbamoyl group, substituted carbamoyl group (e.g. N , N-
diethylcarbamoyl group, N.

N-dibutylcarbamoyl group, N,N-dioctylcarbamoyl group, N-methyl-N-octadecylcarbamoyl group, N-methyl-N-benzylcarbamoyl group), sulfamoyl group, substituted sulfamoyl group (e.g., N,N-
Diethylsulfamoyl group, 2-ethylhexylaminosulfamoyl group, N, N-dibutylsulfamoyl group, N.

N-dioctyl sulfur, amoyl group, N-methyl-N-
Examples include octadecylsulfamoyl group), alkylcarbonyl groups (eg, acetyl group), and arylcarbonyl groups (eg, benzoyl group). By selecting electron-withdrawing or electron-donating groups as these substituents, the reactivity of the hydrazine derivative can be adjusted.

R4 and R5 in the above formula (II) are each
It is an aryl group (which may have - or more substituents).

Examples of the aryl group constituting R4 and R5 include phenyl group, P-chlorophenyl group, tolyl group, p-bromophenyl group, p-methoxyphenyl group, 2,6-dichlorophenyl group, p-cyanophenyl group, etc. can be mentioned. The number of carbon atoms in the aryl group is preferably 6 to 20.

R6 in the above formula (II) is one group selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, an alkoxycarbonyl group, and a carbamoyl group (6 groups may have one or more substituents) It is.

Examples of the alkyl group constituting R6 include methyl group, ethyl group, butyl group, amyl group, 2-ethylhexyl group,
Examples include dodecyl group and octadecyl group.

The number of carbon atoms in the alkyl group is preferably 1 to 20.

Examples of the aryl group include phenyl group, p-chlorophenyl group, tolyl group, p-bromophenyl group, p-methoxyphenyl group, 2,6-dichlorophenyl group, p-cyanophenyl group, and the like. The number of carbon atoms in the aryl group is preferably 6 to 20.

An example of an alkoxycarbonyl group is a methoxycarbonyl group.

Examples of the carbamoyl group include N,N-diethylcarbamoyl group, N,N-dibutylcarbamoyl group, and the like.

It is particularly preferred that R6 is a methyl group, phenyl group, p-chlorophenyl group, p-bromophenyl group or methoxycarbonyl group.

R7 in the above formula (III) is one group selected from the group consisting of a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, an aralkyl group, an alkynyl group, and a heterocyclic group (6 groups are one or more groups). may have a substituent).

The alkyl group that can constitute R7 may be linear or branched. The number of carbon atoms in the alkyl group is preferably 1 to 20, more preferably 1 to 10. Examples of the alkyl group include a methyl group, an ethyl group, a butyl group, a t-butyl group, a t-amyl group, a 2-ethylhexyl group, a t-octyl group, a dodecyl group, an octadecyl group, and the like.

The cycloalkyl group that can constitute R7 preferably has 5 or 20 carbon atoms. An example of a cycloalkyl group is a cyclohexyl group.

The alkenyl group that can constitute R7 preferably has 2 to 10 carbon atoms.

Examples of alkenyl groups include vinyl groups, styryl groups, and the like.

Examples of aryl groups that can constitute R7 are:
Examples include phenyl group, naphthyl group, and anthryl group. A phenyl group is particularly preferred. The aryl group may have a substituent. Examples of substituents that can substitute the aryl group include a halogen atom, an alkyl group, an alkoxy group, a cyano group, a carbamoyl group, an alkyl-substituted carbamoyl group, a sulfamoyl group, an alkyl-substituted sulfamoyl group, an amino group, an alkylamino group, Examples include acylamino groups.

As the substituent, an amino group and an alkylamino group are particularly preferred.

The alkyl group that can substitute the aryl group preferably has 1 to 10 carbon atoms. Examples of alkyl groups include methyl group, ethyl group, butyl group, t
-butyl group, t-amyl group, 2-ethylhexyl group, t
-octyl group and the like.

The alkoxy group that can substitute the aryl group preferably has 1 to 10 carbon atoms. Examples of alkoxy groups include methoxy group, ethoxy group, 2-
Examples include methoxyethoxy group.

Examples of the alkyl-substituted carbamoyl group that can substitute the aryl group include N,N-diethylcarbamoyl group, N,N-dioctylcarbamoyl group, N-methyl-N-octylcarbamoyl group, and the like.

Examples of the alkyl-substituted sulfamoyl group that can substitute the above aryl group include N,N-diethylsulfamoyl group, 2-ethylhexylaminosulfonyl group,
Examples include N,N-dibutylsulfamoyl group, N,N-dioctylsulfamoyl group, N-methyl-N-butylsulfamoyl group, and N-methyl-N-octadecylsulfamoyl group.

The acylamino group that can substitute the aryl group preferably has 1 to 20 carbon atoms. Examples of the acylamino group include 2-ethylhexanoylamino group.

Examples of the aralkyl group that can constitute R7 include benzyl group and diphenylmethyl group.

An example of an alkynyl group that can constitute R7 is a phenylethynyl group.

Examples of the heterocyclic group that can constitute R7 include a pyridyl group, an imidazolyl group, a benzimidazolyl group, a thiazolyl group, a phthalazinyl group, a quinolyl group, an isoquinolyl group, a furyl group, and a tetrahydrofuryl group.

R7 is preferably an alkyl group, a cycloalkyl group, an alkenyl group or an aryl group, more preferably an aryl group, and particularly preferably a phenyl group.

R8 and R9 in the above formula (m) are each an aryl group (optionally having - or more substituents), or R8 and R9 are a fused aromatic group together with adjacent carbon atoms. form.

Aryl groups that can constitute R8 and R9 are:
This is the same as the aryl group that can constitute R7 described above. However, it is preferable that the aryl group has no substituents.

Examples of the fused aromatic group formed by R8 and R9 and adjacent carbon atoms include groups having a xanthine ring, a fluorene ring, and the like.

R” in the above formula (m) is an aryl group, a heterocyclic group,
One group selected from the group consisting of a hydrogen atom, an alkyl group, an alkoxycarbonyl group, and a carbamoyl group (each group may have one or more substituents).

The aryl group that can constitute R'' is the same as the aryl group that can constitute R8 and R9 above.)t I!l R9 and R'' may be the same or different from each other. good.

The alkyl group that can constitute RIO is the same as the alkyl group that can constitute R7 described above.

However, the number of carbon atoms in the alkyl group is preferably 1 to 10.

The alkoxycarbonyl group that can constitute RIo preferably has 2 to 10 carbon atoms. Examples of alkoxycarbonyl groups include methoxycarbonyl groups.

Examples of the substituted carbamoyl group that can constitute R'' include N,N-diethylcarbamoyl group, N,N-dioctylcarbamoyl group, N-methyl-N-octylcarbamoyl group, and the like.

It is particularly preferred that R1' is an aryl group (including substituted aryl groups). )j 8 R9 and R” are
Hydrazine derivatives, both of which are phenyl groups, are particularly preferred.

The reducing agent as described above is preferably contained in the photosensitive layer outside the microcapsule in the form of a solid dispersion. The average particle size of the solid dispersion of the reducing agent is 0.01
The thickness is preferably from 5 μm to 5 μm.

The amount of reducing agent contained in the photosensitive layer outside the microcapsules is preferably 1 to 50 mol% with respect to the amount of reducing agent contained in the microcapsules, and 2
It is more preferably from 5 to 30 mol%, and from 5 to 2 mol%.
Particularly preferred is 0 mol%.

On the other hand, the amount of the reducing agent accommodated in the microcapsules is 0.0000000000 for 1 mole of the total silver contained in the photosensitive layer (including silver halide and optional organic silver salt, which will be described later). It is preferably 1 to 1500 mol%.

The silver halide, polymerizable compound, and support that constitute the light-sensitive material together with the reducing agent described above will be explained in sequence. The photosensitive material having the above structure will be simply referred to as r photosensitive material 1 hereinafter.

Light-sensitive materials contain silver chloride, silver bromide, silver halide,
Any grains of silver iodide, silver chlorobromide, silver chloroiodide, silver iodobromide, or 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 a multiple structure with different compositions on the surface and inside, Japanese Patent Application Laid-open Nos. 57-154232 and 5B-1085
No. 33, No. 59-48755, No. 59-52237, US Pat. No. 4,433,048, and European Patent No. 100984. Also, Unexamined Japanese Patent Publication No. 6
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. 2-183453.

There is also 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 photosensitive material described in JP-A-62-210455.

The above-mentioned silver halide grains include 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 photosensitive material described in Japanese Patent No. 8830.

For the silver halide used in the photosensitive material, two or more types of silver halide grains having different halogen compositions, crystal habits, grain sizes, etc. can be used in combination.

There are no particular restrictions on the grain size distribution of silver halide grains. For example, monodisperse silver halide grains having a substantially uniform grain size distribution may be used, as in the photosensitive material described in JP-A-62-210448.

In the light-sensitive material, the average grain size of the silver halide grains is preferably from o,oot to 5 μm;
More preferably, the thickness is from ooi to 2 μm.

The amount of silver halide contained in the photosensitive layer is 0.1 mg to 1 mg in terms of silver, including organic silver salt, which is an optional component described below.
It is preferable to set it in the range of 0 g/ln". Furthermore, when converting only silver halide into silver, it is preferable to set it to less than Ig/at", and 1 mg to 500 mg/rn".
It is particularly preferable that

The polymerizable compound that can be used in the photosensitive material is not particularly limited, and any known polymerizable compound can be used. By the way, if you are planning to use a photosensitive material for heat development, use a material with a high boiling point (for example, a boiling point of 80
℃ or higher) is preferably used. Furthermore, in the embodiment in which the photosensitive layer contains a color image forming substance as an optional component described later, the color image forming substance is immobilized by polymerization and curing of the polymerizable compound, so the polymerizable compound has a plurality of molecules in the molecule. A crosslinkable compound having a polymerizable functional group is preferable. Furthermore, as will be described later, when forming a transferred image using an image-receiving material, Japanese Patent Application No. 15007-1986
It is preferable to use a highly viscous substance as the polymerizable compound, as in the photosensitive material described in No. 9.

Polymerizable compounds used in photosensitive materials generally have addition polymerizability or ring-opening polymerizability. Examples of the compound having addition polymerizability include compounds having an ethylenically unsaturated group, and 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. Examples include acids, maleic esters, itaconic esters, styrenes, vinyl ethers, vinyl esters, N-vinyl heterocycles, allyl ethers, allyl esters, and derivatives thereof.

Specific examples of polymerizable compounds that can be used in photosensitive materials include 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 pentaerythritol condensate , hydroxypolyether polyacrylates, polyester acrylates, polyurethane acrylates, and the like.

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

The above polymerizable compounds may be used alone or in combination of two or more. 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 the 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.

In the light-sensitive material, the polymerizable compound is preferably used in an amount of 50,000 to 120,000 parts by weight per 1 part by weight of silver halide. A more preferable usage range is 12 to 120
00 parts by weight.

In the photosensitive material of the present invention, the polymerizable compound and the above-mentioned reducing agent are contained in the photosensitive layer in a state of being accommodated in microcapsules. Regarding this microcapsule,
Various known techniques can be used without particular limitations.

Note that it is preferable that the microcapsules also contain silver halide.

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.

Further, when silver halide is contained in microcapsules, it is preferable that the number of silver halide particles contained in the microcapsules is 5 or more, as described in JP-A-63-15239. .

Furthermore, two or more microcapsules containing at least one different component may be used in combination, such as silver halide, a reducing agent, a polymerizable compound, and a color image forming substance which is an optional component described below. good. In particular, when forming a full-color image, it is preferable to use three or more types of microcapsules containing different color image-forming substances in different hues. For photosensitive materials containing two or more types of microcapsules, JP-A-62-19
There is a description in Publication No. 8850.

The average particle diameter of the microcapsules is preferably 3 to 20 μm. It is preferable that the particle size distribution of the microcapsules is uniformly distributed over a certain value, as in the photosensitive material described in JP-A No. 63-5334. In addition, the film thickness of the microcapsule is
As in the photosensitive material described in Publication No. 6, it is preferable that the particle diameter is 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, and 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.

A photosensitive material is formed by providing a photosensitive layer containing the above-mentioned components on a support. There are no particular restrictions on the support, but if heat development is planned as a method of using the photosensitive material, it is preferable to use a material that can withstand the processing temperature of the development. Materials that can be used for the support include glass, paper, wood-free paper, coated paper, cast coated paper, synthetic paper, metals and their analogs, polyester, cellulose acetate, cellulose ester, polyvinyl acetal, polystyrene, polycarbonate, polyethylene. Examples include films such as terephthalate, and papers laminated with resin materials and polymers such as polyethylene.

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. It is preferable to have. In addition, when using a paper support, a paper support with low water absorption such as the photosensitive material described in JP-A No. 63-38934, and a paper support with a constant water absorption rate such as the photosensitive material described in JP-A No. 63-47754 can be used. Paper support having Bekk smoothness of JP-A-63-8133
A paper support with a low shrinkage rate such as the photosensitive material described in JP-A No. 9, a paper support with low air permeability such as the photosensitive material described in JP-A-63-81340, and a paper support as described in JP-A-63-97941. A paper support having a pH value of 5 to 9, such as the photosensitive material described above, can also be used.

Optional components that can be included in the photosensitive layer of the photosensitive material include color image forming substances, sensitizing dyes, organic silver salts, radical generators, various image formation accelerators, thermal polymerization inhibitors, thermal polymerization initiators, Development stoppers, fluorescent whitening agents, antifading agents, dyes or pigments for preventing halation or irradiation, pigments that develop color when heated or irradiated with light,
Examples include matting agents, anti-smudge agents, plasticizers, water release agents, binders, photopolymerization initiators, solvents for polymerizable compounds, and water-soluble vinyl polymers.

Although a polymer image can be obtained from the photosensitive material by the above-described structure of the photosensitive layer, a color image can also be formed by including a color image forming substance as an optional component in the photosensitive layer.

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. Incidentally, general photosensitive materials using color image-forming substances are described in the above-mentioned Japanese Patent Laid-Open No. 73145/1983. Regarding photosensitive materials using dyes or pigments as color image forming substances, see JP-A-62-187346, and about photosensitive materials using leuco dyes, see JP-A-62-209436. For photosensitive materials using leuco dyes, see JP-A No. 62-251741, and for photosensitive materials using yellow coloring leuco dyes, see JP-A Nos. 62-288827 and 62-288.
No. 828 describes a photosensitive material using a cyan color-forming leuco dye, and Japanese Patent Application Laid-Open No. 63-53542 discloses a photosensitive material using a cyan color-forming leuco dye. 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 1972, "
Latest Pigments Handbook” edited by Japan Pigment Technology Association, published in 1972)
The known ones described in 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, pressure-sensitive copying paper (pages 29-58) and Azography (pages 87-58) described in Hiroyuki Moriga's Introduction to Special Paper Chemistry 1 (published in 1975)
95 pages), known coloring systems such as heat-sensitive coloring by chemical changes (pages 118-120), or a preview of the seminar sponsored by the Kinki Chemical Industry Association - Latest Pigment Chemistry - Attractive Uses and New Developments as Functional Dyes - 1 Collection, pp. 26-32, (198
It is possible to use the coloring system described in June 19, 2013).

Specifically, a coloring system consisting of a coloring agent with a six-structure partial structure such as lactone, lactam, and spiropyran used in pressure-sensitive paper, and an acidic substance (color developer) such as acid clay and phenols: aromatic diazonium. Systems that utilize azo coupling reactions between salts, diazotates, diazosulfonates, and naphthols, anilines, active methylenes, etc.; reactions between hexamethylenetetramine, ferric ions, and gallic acid, and phenolphthalein-complex reactions. A chelate-forming reaction such as a reaction between ferric nistearate and pyrogallol, and an oxidation-reduction reaction such as a 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 20 parts by weight per 100 parts by weight of the polymerizable compound,
More preferably, it is used in a proportion of 2 to 7 parts by weight.

Further, 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.

In addition, when using two types of substances that cause a color-forming reaction when in contact as the solid color image-forming substances described above, one of the substances that cause the above-mentioned color-forming reaction and a polymerizable compound are contained in microcapsules. However, a color image can be formed on the photosensitive layer by allowing other substances among the substances that cause the color-forming reaction to exist outside the microcapsules containing the polymerizable compound. Regarding photosensitive materials that can obtain color images without using an image-receiving material as mentioned above,
There is a description in JP-A-62-209444.

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. Particularly when the purpose is supersensitization, it is common to use a combination of sensitizing dyes. In addition, 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 with the sensitizing dye. The amount of sensitizing dye added is generally 10-8 to 10-8 per mole of silver halide.
It is about 2 moles.

The above-mentioned sensitizing dye 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 at the stage of forming silver halide grains, JP-A-62-947 discloses that a sensitizing dye is added to a silver halide emulsion after the formation of silver halide grains. The photosensitive materials obtained by adding these materials in the preparation stage are described in JP-A-62210449. Furthermore, specific examples of sensitizing dyes that can be used in light-sensitive materials are also disclosed in the above-mentioned JP-A-62-947 and JP-A-62-947.
It is described in No. 210449. Also, the special request
As in the photosensitive material described in No. 1-208786, an infrared-sensitive sensitizing dye may be used in combination.

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, benzotriazole is particularly preferred. The above organic silver salt is generally 0.01 to 10 mol, preferably 0.01 mol per mol of silver halide.
Use 1 to 1 mole. Note that the same 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. According to the research conducted by the present inventors, it is preferable to include the organic silver salt as described above in the photosensitive layer outside the microcapsules.

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.

A photosensitive material using silver triazene as the radical generator is described in JP-A-62-195639, and a photo-sensitive material using silver diazotate is described in JP-A-62-1956.
No. 195640 describes a photosensitive material using an azo compound, and JP-A-62-195641 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 organic silver salt) and a reducing agent, and those that promote the redox reaction between silver halides (and/or organic silver salts) and reducing agents, and those that promote the redox reaction between silver halides (and/or organic silver salts) and reducing agents, and those that promote the redox reaction between silver halides (and/or organic silver salts) and reducing agents, and those that promote the redox reaction between silver halides (and/or organic silver salts) and reducing agents. 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 precursor oils, surfactants, compounds with antifogging and/or development accelerating 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 inorganic bases such as 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;
Examples include ammonium hydroxide; hydroxides of quaternary alkylammonium; hydroxides of other metals, etc. Examples of organic bases include aliphatic amines (trialkylamines,
Hydroxylamines, aliphatic polyamines): Aromatic amines (N-alkyl-substituted aromatic amines, N-hydroxylalkyl-substituted aromatic amines and bis[p-
(dialkylamino)phenylcomethanes), heterocyclic amines, amidines, cyclic amidines, guanidines, cyclic guanidines, etc., and those having a pKa of 7 or more are particularly preferred.

Examples of base precursors include salts of organic acids and bases that undergo carbonation 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-)luidine trichloroacetic acid, 2-picoline trichloroacetic acid, guanidine phenylsulfonylacetate, 4-chlorophenylsulfonylacetate guanidine, and 4-chlorophenylsulfonylacetate. Examples include guanidine methyl-sulfonylphenylsulfonylacetate 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.
A range of from to 40% by weight is useful. 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 Japanese Patent Application No. 60-227528. Further, for a photosensitive material using a tertiary amine as a base, see JP-A-62-170954, and for a photosensitive material using a fine particle dispersion of a hydrophobic organic base compound with a melting point of 80 to 180°C. Japanese Patent Publication No. 62-20952
No. 3 describes a photosensitive material using a guanidine derivative with a solubility of 0.1% or less in JP-A No. 62-215637.
In the specification of the patent application No. 1987, for photosensitive materials using hydroxides or salts of alkali metals or alkaline earth metals,
Each of these is described in the specification of No.-96341.

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 in a state separated 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 a free state JP-A-63-97942 describes a photosensitive material containing a base precursor, and JP-A-63-9794 describes 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 production reaction. No. 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 No. 63-48543, which uses an organic base as a base precursor. 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 silver halide, a reducing agent, and a polymerizable compound are contained in the microcapsules described above, and a base or a base precursor is present in the photosensitive layer outside the microcapsules. Or, JP-A-62-2095
As in the photosensitive material described in Japanese Patent No. 21, the base or base precursor may be contained in separate microcapsules. In addition to the photosensitive materials using microcapsules containing bases or base precursors, there is also a photosensitive material containing microcapsules containing bases or base precursors dissolved or dispersed in an aqueous water-retaining agent solution, as described in JP-A-62. Japanese Unexamined Patent Publication No. 209522 discloses a photosensitive material in which solid fine particles carrying a base or a base precursor are housed in microcapsules, and JP-A-62-209526 discloses a photosensitive material in which microcapsules containing a basic compound having a melting point of 70°C to 210°C is used. Regarding the photosensitive material used, see Japanese Patent Application Laid-Open No. 1986-
Each of these is described in Japanese Patent No. 65437. Furthermore, instead of the microcapsules containing the base or base precursor, particles containing the base or base precursor in a compatible state with a hydrophobic substance may be used, as in the photosensitive material described in JP-A-63-97943. .

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, JP-A-63-32
As described in Japanese Patent Application No. 546, the above-mentioned support may be made porous and a base or a base precursor may be contained in the porous support.

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.
No. 151842 describes photosensitive materials using polyethylene glycol derivatives, and Japanese Patent Application Laid-Open No. 151843/1983
For photosensitive materials using thiol derivatives, see JP-A-62-151844, and for photosensitive materials using acetylene compounds, see JP-A-62-17823.
For photosensitive materials using sulfonamide derivatives, see JP-A-62-183450, and for photosensitive materials using quaternary ammonium salts, see JP-A No. 63-9.
Publication No. 1653 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 oleic acid esters of polyethylene oxide, beeswax, monostearin, -5O
Compounds with high dielectric constant having 2- and/or -Co- groups, polar substances described in U.S. Pat. No. 3,667,959, 1,10-decanediol described in Research Disclosure magazine, December 1976 issue, pages 26-28 , methyl anisate, biphenyl perate and the like 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 (oxygen has a polymerization inhibiting effect) during development. Examples of compounds having an oxygen removing function include compounds having two or more mercapto groups. Incidentally, a photosensitive material using a compound having two or more mercapto groups is described in JP-A-62-209443.

Thermal polymerization initiators that can be used in photosensitive materials are generally compounds that are thermally decomposed under heating to generate polymerization initiating species (particularly radicals), and are commonly used as radical polymerization initiators.

Thermal polymerization initiators are described in pages 6 to 18 of ``Addition Polymerization/Ring-Opening Polymerization Jl'' edited by the Editorial Committee of Polymer Experimental Science, Japan Society of Polymer Science, 983, Kyoritsu Shuppan). Specific examples of the thermal polymerization initiator include azobisisobutyronitrile, 1,1°-azobis(1-cyclohexanecarbonitrile), dimethyl-2,2°-azobisisobutyrate, 2°2-azobis( azo compounds such as 2-methylbutyronitrile), azobisdimethylvaleronitrile, organic peroxides such as benzoyl peroxide, di-t-butyl peroxide, dicumyl peroxide, t-butyl hydroperoxide, and cumene hydroperoxide. Examples include inorganic peroxides such as hydrogen peroxide, potassium persulfate, and ammonium persulfate, sodium p-1-luenesulfinate, etc.Thermal polymerization initiator is used in an amount of 0.1% based on the polymerizable compound. It is preferably used in the range of 1 to 120% by weight, and more preferably in the range of 1 to 10% by weight.In addition, in a system in which the polymerizable compound is polymerized in the area where the silver halide latent image is not formed. It is preferable to add a thermal polymerization initiator to the photosensitive layer.For photosensitive materials using a thermal polymerization initiator, see Japanese Patent Application Laid-Open No. 62-708.
There is a description in Publication No. 36.

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. 80-192939, and compounds which release an acid by Rossen rearrangement described in JP-A No. 60-230133.

Examples of electrophilic compounds that undergo a substitution reaction with a base upon heating include compounds described in JP-A-60-230134.

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-63-29748 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 fine powder, talc, kaolin, bentonite, waxite, zinc oxide, titanium oxide, and alumina. The average particle size of the particles is preferably in the range of 3 to 50 μm, more preferably in the range of 5 to 40 μm in volume average diameter. It is more effective for the particles to be larger than 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 natural substances such as gelatin, gelatin derivatives, cellulose derivatives, starch, gum arabic, etc., and polyvinyl alcohol, polyvinylpyrrolidone, acrylamide polymers, etc. Contains synthetic polymeric materials such as water-soluble polyvinyl compounds.

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.

A photopolymerization initiator may be added to the photosensitive layer of the photosensitive material for the purpose of polymerizing unpolymerized polymerizable compounds after image transfer. 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. Regarding photosensitive materials using organic solvents that are miscible with polymerizable compounds encapsulated in microcapsules, Japanese Patent Application Laid-Open No. 62-2095
There is a description in Publication No. 24.

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 related to the above-mentioned series of photosensitive materials and Research Disclosure Magazine Vol.

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.

Layers that can be optionally provided on the photosensitive material include an image-receiving layer, a heating layer, an antistatic layer, an anti-curl layer, a peeling layer,
Examples include a cover sheet or protective layer, a layer containing a base or a base precursor, a two-base barrier layer, an antihalation layer (colored layer), and the like.

Instead of using the image-receiving material described below as a method of using the photosensitive material, the above image-receiving layer may be provided on the photosensitive material and an image may be formed on this layer. The image-receiving layer provided on the photosensitive material can have the same structure as the image-receiving layer provided on the image-receiving material. Details of the image receiving layer will be described later.

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.

The method for manufacturing the photosensitive material will be described below.

Various methods can be used to produce photosensitive materials, but the numerical method involves preparing a coating solution in which the components of the photosensitive layer are dissolved, emulsified, or dispersed in an appropriate solvent; This process consists of applying a coating solution to the support as described above and drying it to obtain a photosensitive material.

Generally, each of the above-mentioned coating liquids is prepared by preparing a liquid composition containing each component and then mixing the respective liquid compositions. The liquid composition may be prepared to contain multiple components. Some of the components of the photosensitive layer can also be added during or after the preparation of the liquid composition or coating solution. Furthermore, as described below, a method of preparing a secondary composition by further emulsifying an oil-based (or aqueous) composition containing one or more components in an aqueous (or oil-based) solvent can also be used. .

Regarding the main components contained in the photosensitive layer, methods for preparing a liquid composition and a coating solution are shown below.

Preparation of the halogenated emulsion can be carried out using any known method such as an acid method, a neutral method or an ammonia method.

The reaction format between soluble silver salt and soluble halogen salt is as follows:
Either one side mixing method, simultaneous mixing method or a combination thereof may be used. A back-mixing method in which particles are formed under conditions in excess of silver ions and a Chondrold double-jet method in which PAg is kept constant can also be employed. In addition, to accelerate particle growth,
The concentration, amount, or rate of addition of silver salts and halogen salts may be increased (Japanese Patent Application Laid-Open No. 1581-1581).
No. 24, No. 55-158124, and U.S. Pat. No. 3,650,757).

The silver halide emulsion used in the production of light-sensitive materials may be of the surface latent image type, in which latent images are mainly formed on the grain surfaces, or of the internal latent image type, in which the latent images are formed inside the grains. Direct reversal emulsions combining internal latent image type emulsions and nucleating agents can also be used. Internal latent image emulsions suitable for this purpose are disclosed in U.S. Pat. No. 2,592,250, U.S. Pat.
No. 6641, various publications, etc., contain detailed information. A preferred nucleating agent for combination with the above emulsion is US Pat. No. 3,227,552
No. 4245037, No. 4255511, No. 4266013, No. 4276364, and OLS No. 2635316.

In the preparation of silver halide emulsions used in the production of light-sensitive materials, it is preferable to use hydrophilic colloids as protective colloids. Examples of hydrophilic colloids include gelatin, gelatin derivatives, graft polymers of gelatin and other polymers, proteins such as albumin and casein; hydroxyethyl cellulose, carboxymethyl cellulose,
Cellulose derivatives such as cellulose sulfates, sodium alginate, sugar derivatives such as starch derivatives: and polyvinyl alcohol, polyvinyl alcohol partial acetal, poly-N-vinylpyrrolidone, polyacrylic acid, polymethacrylic acid, polyacrylamide, polyvinylimidazole A wide variety of synthetic hydrophilic polymeric materials can be mentioned, such as single or copolymers such as polyvinylpyrazole, polyvinylpyrazole, and the like. Among these, gelatin is preferred. As the gelatin, in addition to lime-treated gelatin, acid-treated gelatin or enzyme-treated gelatin may be used, and gelatin hydrolysates or enzymatically decomposed products may also be used.

Silver halide emulsions are prepared by using ammonia, organic thioether derivatives (see Japanese Patent Publication No. 47-386), and sulfur-containing compounds (see Japanese Patent Application Laid-Open No. 144319-1987) as silver halide solvents in the stage of forming silver halide grains.
etc. can be used. Further, in the process of particle formation or physical ripening, cadmium salt, zinc salt, lead salt, thallium salt, etc. may be allowed to coexist. In addition, iridium chloride (■ or ■) was added for the purpose of improving high-light failure and low-light failure.
, water-soluble iridium salts such as ammonium hexachloroiridium salt, or water-soluble rhodium salts such as rhodium chloride.

The soluble salts may be removed from the silver halide emulsion after precipitation or physical ripening. In this case, it can be carried out according to the Tardel water washing method or the sedimentation method. Silver halide emulsions may be used as they are after ripening, but they are usually used after chemical sensitization. In emulsions for conventional sensitive materials, known sulfur sensitization methods, reduction sensitization methods, noble metal sensitization methods, etc. can be used alone or in combination. These chemical sensitizations can also be carried out in the presence of nitrogen-containing heterocyclic compounds (Japanese Patent Application Laid-open No. 58
-126526, No. 58-215644).

In addition, when adding a sensitizing dye to a silver halide emulsion,
The aforementioned Japanese Patent Application Laid-Open No. 62-947 and Japanese Patent Application No. 1988-
It is preferable to add it at the stage of preparing a silver halide emulsion as in the photographic material described in No. 55510. In addition, when adding a nitrogen-containing heterocyclic compound as a compound having the above-mentioned antifogging function and/or development accelerating function, it should be added during the formation stage or ripening stage of silver halide grains in the preparation of a silver halide emulsion. is preferred. A method for producing a light-sensitive material in which a nitrogen-containing heterocyclic compound is added at the stage of forming or ripening silver halide grains is described in JP-A-62-161144.

When the organic silver salt described above is included in the photosensitive layer, the organic silver salt emulsion can be prepared by a method similar to the method for preparing the silver halide emulsion described above.

In the production of photosensitive materials, the polymerizable compound can be used as a medium in preparing the composition of other components in the photosensitive layer. For example, silver halide (including silver halide emulsions), reducing agents, color image forming substances, etc. can be dissolved, emulsified or dispersed in a polymerizable compound and used in the production of photosensitive materials. Particularly when a color image forming substance is added, it is preferable to include a polymerizable compound therein. Further, components such as wall materials necessary for microencapsulation may be included in the polymerizable compound.

A photosensitive composition containing silver halide in a polymerizable compound can be prepared using a silver halide emulsion. In addition to the silver halide emulsion, silver halide powder prepared by freeze-drying or the like can also be used to prepare the photosensitive composition.

Photosensitive compositions containing these silver halides can be obtained by stirring with a homogenizer, blender, mixer, or other commonly used stirrers.

In addition, it is preferable that a copolymer consisting of a hydrophilic repeating unit and a hydrophobic repeating unit is dissolved in the polymerizable compound used for preparing the photosensitive composition. Regarding photosensitive compositions containing the above-mentioned copolymers, JP-A-62-
There is a description in No. 209449.

Further, instead of using the above copolymer, a photosensitive composition may be prepared by dispersing microcapsules having a silver halide emulsion as a core material in a polymerizable compound. A photosensitive composition containing microcapsules having the above-mentioned silver halide emulsion as a core material is described in JP-A-62-164041.

It is preferable to use the polymerizable compound (including those containing other constituent components like the above photosensitive composition) in the form of an emulsion in an aqueous solvent. It is also possible to add a wall material necessary for microcapsulation to this emulsion and further perform a treatment to form the outer shell of the microcapsules at the stage of this emulsion.

Examples of the above-mentioned microencapsulation method include a method using coacervation of aromatic hydrophilic wall-forming materials as described in U.S. Pat. No. 2,800,457 and U.S. Pat. No. 2,800,458; Specification, and Special Publication No. 38-1957
4, No. 42-446, and No. 42-771. Interfacial polymerization method described in U.S. Pat. No. 3,418,250 and No. 3,660,304. Method by precipitation of aromatic polymer; U.S. Pat. No. 3,796,669 Method using the incyanate-polyol wall material described in U.S. Pat. No. 3,914,511 Method using the isocyanate wall material described in U.S. Pat. No. 4,001,140;
No. 087376 and No. 4089802 A method using aromatic urea-formaldehyde-based or urea-formaldehyde-resircinol-based wall forming materials; melamine-formaldehyde resin, hydroxypropyl cellulose, etc. described in U.S. Pat. No. 402-5455 Method using wall-forming material: Japanese Patent Publication No. 36-9168 and Japanese Patent Publication No. 51-9079 In 5 in-itu method by polymerization of monomers described in Japanese Patent Publication No. 927807 and British Patent No. 965074 Polymerization dispersion cooling method described; US Pat. No. 3,111,407 and British Patent No. 93
Examples include the spray drying method described in the specification of 0422 Aroyo. Although the method for microcapsulating oil droplets of a polymerizable compound is not limited to the above, a method in which a core substance is emulsified and then a polymer film is formed as a microcapsule wall is particularly preferred.

Regarding photosensitive microcapsules that can be used in the production of photosensitive materials, JP-A-62-169147, JP-A No. 62-169148, JP-A No. 62-209437,
No. 62-209438, No. 62-209439, No. 62-209440, No. 62-209441, No. 6
There are descriptions in each of the publications No. 2-209447 and No. 62-209437.

By adding the reducing agent to be included in the photosensitive layer outside the microcapsules to the dispersion of microcapsules containing the polymerizable compound and reducing agent prepared as described above, the photosensitive layer is formed. A coating solution can be prepared.

It is also possible to add other components at the stage of this coating solution in the same manner as in the case of the emulsion described above.

A photosensitive material is produced by applying the coating solution for the photosensitive layer prepared as described above onto a support and drying it. The coating liquid can be easily applied to the support according to known techniques.

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

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
Sensitive wavelength of silver halide (if dye sensitization is performed,
It can be selected depending on the sensitized wavelength) and sensitivity. 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. The photosensitive material was published under the Special Publication Act in 1977-111.
Development processing using a developer described in Japanese Patent No. 49 or the like may be performed. As mentioned above, the method described in Japanese Patent Application Laid-Open No. 61-69062 which performs heat development treatment is a dry treatment, and therefore has the advantage of being simple to operate and capable of processing in a short time. Therefore, the development process for photosensitive materials is as follows:
The latter is especially good.

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 heat generating layer may be provided on the photosensitive material and used as a heating means. Further, as in the image forming method described in JP-A-62-210461, heat development may be performed while suppressing the amount of oxygen present in the photosensitive layer. The heating temperature is generally 80°C to 200°C, preferably 100°C or 1 second to 1 minute.

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 preferred.

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 latent image of silver halide is generally polymerized in the heat development process described above.
As in the photosensitive material described in Japanese Patent No. 70836, by adjusting the type, amount, etc. 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.

When the photosensitive material is constructed like the photosensitive material described in JP-A No. 62-209444 mentioned above, there are two types of photosensitive materials in which the developed photosensitive material is pressurized to destroy the microcapsules and cause a coloring reaction. A color image can be formed on a photosensitive material by bringing the substances into contact with each other.

The image-receiving material can also be used to form an image on the image-receiving material.

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, baryta paper can be used in addition to the supports that can be used for the photosensitive materials described above. 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 like the image-receiving material described in the above publication. Further, 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. The mordant can be selected from compounds known in the photographic technology, taking into consideration conditions such as the type of color image forming substance, and used. Note that, if necessary, a plurality of mordants having different mordant powers may be used to form two or more image-receiving layers.

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 thermoplastic compound fine particles. 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. There are no particular restrictions on the above thermoplastic compound, and known thermoplastic resins (
It can be arbitrarily selected from among (plastic), wax, etc. 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. 62-280
There is a description in No. 071 and 62-280739 Yoyo 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, a dye or a pigment may be included in the image-receiving layer for the purpose of making it easier to distinguish between the front and back sides of the image-receiving material. As the dye or pigment, various known substances including dyes or pigments that can be used in image formation can be used, but there is a risk that the dye or pigment may damage the image formed in the image-receiving layer. In some cases, it is preferable to lower the dyeing density of the dye or pigment (for example, make the reflection density 1 or less), or to use a dye or pigment that has the property of developing color by heating or light irradiation.

An image-receiving material having an image-receiving layer containing a dye or pigment that has the property of developing color 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 amount of white pigment is 10 g per 1 g of the thermoplastic compound.
It is preferable to use the amount in the range of 100 g to 100 g.

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 00 μm, and more preferably 1 to 20 μm.

Note that a protective layer 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 photosensitive material is developed as described above, and by pressing the image-receiving material in a stacked state, the unpolymerized polymerizable compound is transferred to the image-receiving material, and a polymer image can be obtained on the image-receiving material. can. Regarding the above pressurizing means,
Various conventionally known methods can be used.

Further, in an embodiment in which the photosensitive layer contains a color image forming substance,
By performing a similar development treatment, the polymerizable compound is polymerized and cured, thereby immobilizing the color image forming substance in the cured portion. Then, by pressing the photosensitive material and the image-receiving material in a superimposed state, the uncured portion of the color image-forming substance is transferred to the image-receiving material, and a color image can be obtained on the image-receiving material.

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.

Additionally, the applicant has already filed patent applications for various image recording apparatuses suitable for carrying out the above-described series of image forming methods using photosensitive materials. Typical devices for Kowara are an exposure device that forms a latent image by imagewise exposure, a heat development device that hardens and immobilizes the area corresponding to the formed latent image, and a heat development device that (Japanese Unexamined Patent Publication No. 147461/1982), which is composed of a transfer device that superimposes an image-receiving material on a photosensitive material and applies pressure thereto; A structure equipped with a fixing device that performs either pressure or heating (Japanese Patent Application No. 60-28970)
3) etc.

Photosensitive materials include black and white or color photography and printing photosensitive materials, printing photosensitive materials, printing plates, X-ray photosensitive materials, medical photosensitive materials (for example, ultrasonic diagnostic CRT photosensitive materials), 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.

The following margin is [Example 1] 3 parts of halogen; gelatin aqueous solution (24 parts of gelatin in 1200rnJZ of water)
g and 1.2 g of sodium chloride, and diluted with IN sulfuric acid.
600 mJ of an aqueous solution containing 117 g of potassium bromide! and silver nitrate aqueous solution (0 silver nitrate in 600ml of water)
．． 74 mol dissolved) were simultaneously added at equal flow rates over 15 minutes. One minute after this addition was completed, 47 cc of a 1% methanol solution of the following sensitizing dye was added, and 15 minutes after the dye addition was completed, 47 cc of potassium iodide solution was added.
．． 200 ml of an aqueous solution containing 3 g 1. was added over a period of 5 minutes. To this emulsion, 1.2 g of poly(isobutylene-monosodium comaleate) was added to precipitate excess salt, and after desalting by washing with water, 24 g of gelatin was added and dissolved, and further 5 mg of sodium thiosulfate was added. 6
Chemical sensitization was carried out at 0° C. for 15 minutes to obtain a silver halide emulsion with a yield of 1000 g.

(Sensitizing dye) To 100 g of trimethylolpropane triacrylate (Aronix M-309, manufactured by Toagosei Kagaku ■), 0.40 g of the following copolymer and Vargus Script Red 1-6-B (manufactured by Ciba Geigy) were added. OOg was dissolved. Then, the above solution 24. To OOg, 1.29 g of the following hydrazine derivative (1) (reducing agent), 1.22 g of the following developer (reducing agent), 0.36 g of Emarex NP-8 (manufactured by Nippon Emulsion ■), and 0 of the following mercapto compound. .003g, plus methylene chloride4. OOg was added to obtain an oily liquid.

On the other hand, the silver halide emulsion 3. Add 0.46 g of a 10% aqueous solution of potassium bromide to OOg and stir for 5 minutes.
An aqueous liquid was obtained.

Next, an aqueous liquid was added to the above oily liquid and stirred for 5 minutes at t5ooo rotations per minute using a homogenizer to obtain W1.
A photosensitive composition in the form of a zero emulsion was obtained.

(Copolymer) CH3CH3 to 02O2C21 l O2G H2[: H20H (Hydrazine derivative (I)) 2H5 (Developer) (Mercapto compound) Sodium salt of polyvinylbenzenesulfonic acid (Ver.
sa TL 500 (manufactured by National Starch) 10
% aqueous solution was adjusted to pH 3.5 using a 20% aqueous solution of phosphoric acid. On the other hand, in the photosensitive composition, Takenate DII
ON (% isocyanate compound, manufactured by Takeda Pharmaceutical Company)
0.90 g was added to the above aqueous solution. This mixed solution was heated to 40° C. and stirred for 30 minutes at 7000 rpm using a homogenizer to obtain a W10/W emulsion.

Separately, melamine 13.20g and formaldehyde 37%
Add 21.6 g of aqueous solution and 70.8 g of distilled water,
C. and stirred for 30 minutes to obtain a transparent aqueous solution of melamine/formaldehyde precondensate.

To 13.00 g of an aqueous solution of this initial condensate, add
/W emulsion was added and the pH was adjusted to 6.5 using a 20% aqueous solution of phosphoric acid. Next, this was heated to 50°C and stirred for 120 minutes. Furthermore, the pH was adjusted to 7.0 using an IN sodium hydroxide aqueous solution to obtain a photosensitive microcapsule dispersion having capsule walls made of melamine formaldehyde resin.

Hydrazine derivatives used to prepare W10 emulsion of hydrazine 4 (
20 g of I) was added to 180 g of a 3% aqueous solution of polyvinyl alcohol (PVA205, manufactured by Kuraray ■) and stirred for 20 minutes at 3000 revolutions per minute using a Dyno Mill to obtain a solid dispersion of a hydrazine derivative.

Sensation: Add 6.5 g of penzotriazole made from silver salt and 10 g of gelatin to 1 portion of water.
Dissolved in 00100O. This solution was kept at 50°C and stirred. Next, add 8.5 g of silver nitrate to 10,100 O of water! was added to the above solution over a period of 2 minutes. By adjusting the pH of this, unnecessary salts are precipitated and removed, and then p
H was adjusted to 6.0, and silver benzotriazole was obtained with a yield of 400 g.

To 10 g of the photosensitive microcapsule dispersion prepared as described above, 1.0 g of a 5% aqueous solution of the following surfactant, 2.3 g of a 20% solid dispersion of the following base precursor, Add 3.0 g of a 20% aqueous solution of sorbitol, 0.7 g of silver benzotriazole, 0.3 g of a dispersion of drazine, and 3.3 g of a 20% aqueous dispersion of corn starch, and further add 7.0 g of distilled water and stir well. A coating solution was prepared.

Apply this coating liquid using a #40 wire bar with a basis weight of 65.
g/m″ cast coated paper (Sanyo Kokusaku Pulp■
Co., Ltd.) and dried at about 40° C. to prepare a photosensitive material (A) according to the present invention.

(Surfactant) [Example 2] Except for using the following hydrazine derivative (n) in place of the hydrazine derivative (I) used in the preparation of the photosensitive material of Example 1. A photosensitive material (B) according to the present invention was prepared in the same manner as in Example 1.

(Hydrazine derivative (■)) [Comparative example 1] Example 1 and Example 1 except that the solid dispersion of the hydrazine derivative was not added to the coating solution in preparing the photosensitive material of Example 1. A comparative photosensitive material (C) was prepared in the same manner.

Add 11 g of 40% sodium hexametaphosphate aqueous solution to 125 g of water, and further mix 34 g of zinc 3.5-di-α-methylbenzylsalicylate and 82 g of 55% calcium carbonate slurry. , and coarsely dispersed with a mixer.

The liquid was dispersed using a Dynamyl dispersion machine, and 20% of the obtained liquid
To 0 g, 6 g of 50% SBR latex and 55 g of 8% polyvinyl alcohol aqueous solution were added and mixed uniformly. This mixed solution was uniformly applied onto baryta paper having a basis weight of 43 g/rn'' to a wet film thickness of 30 μm, and then dried to prepare an image-receiving material.

Evaluation of Photosensitive Materials Each of the photosensitive materials obtained in Example 1.2 and Comparative Example 1 was exposed for 1 second at 200 lux using a tungsten bulb through a filter (wedge) with a continuously changing density. This was placed on a hot plate at 155°C and heated for 10 seconds. Next, each photosensitive material was stacked on the above-mentioned image receiving material, and in that state, 450 kg /
The magenta positive color image obtained on the image-receiving material was measured using a Macbeth densitometer to measure the highest density (Do+ax) and the lowest density (DIIIin
) was measured. In addition, the degree of white background in the exposed area was visually evaluated.

The above results are shown in Table 1.

Table 1: Photosensitivity - Highest Lowest Exposure Area Material
(Inside) (Outside) White background with 1 degree density (A) (I)
(I) 1.2 0.07 Pure white (B)
(I) (II) 1.2 0.07
Pure white (C) (I) None 1.2 0.08 Very pale magenta As is clear from the results shown in Table 1, a reducing agent (hydrazine derivative) is also contained in the external photosensitive layer of the photosensitive microcapsules. The photographic materials (A) and (B) of the present invention containing the above-mentioned compositions gave very clear images with high contrast.

Claims (1)

[Claims] 1. In a photosensitive material that has a photosensitive layer containing silver halide, a reducing agent, and a polymerizable compound on a support, and the photosensitive layer contains the polymerizable compound and the reducing agent in microcapsules. . A photosensitive material characterized in that a reducing agent is also contained in the photosensitive layer outside the microcapsules.