JPH0420175B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a method for producing a heat-developable color photosensitive material, and more particularly to a method for producing a heat-developable color photosensitive material with improved stability during production and storage. (Prior Art) A method in which the developing step for obtaining a color image is performed by dry heat treatment has many advantages over the conventional wet method in terms of processing time, cost, and concerns about pollution. Therefore, many proposals regarding such heat-developable color photosensitive materials have been made in recent years, for example, JP-A-57-179840;
No. 186744, No. 57-198458, No. 57-207250, No. 57-207250, No.
No. 58-40551, No. 58-58543, No. 58-79247,
Patent application No. 57-122596, No. 57-132884, No. 57-
No. 179236, No. 57-229671, No. 57-229674, No.
No. 57-229675, No. 58-33363, No. 58-33364,
No. 58-34083, JP-A No. 58-116537, No. 58-
There are No. 123533, No. 58-149046, No. 58-14947, etc. The basic composition of the heat-developable color photosensitive materials according to these proposals consists of a photosensitive element and an image-receiving element, and the photosensitive element basically contains an organic silver salt, a photosensitive silver halide, a developer (reducing agent), and a dye donor. It consists of a compound and a binder. That is, optical information is given to the photosensitive silver halide by image exposure,
In thermal development, dissolution physical development according to optical information is performed between an organic silver salt and a photosensitive silver halide under the action of a developer, and the developer that has acted or has not acted is converted into a dye-providing compound. Upon reaction, a dye that forms an image is released or formed. The image-forming dye obtained by thermal development is transferred to an image-receiving element to form an image. To produce such a heat-developable color photosensitive material, basically (a) photosensitive silver halide, (b) organic silver salt, (c) developer, (d) dye-providing compound, (e) The production method involves mixing a binder to form a coating liquid, coating it on a support, and drying it, but mixing the components (a) to (e) above to form a coating liquid can be done using the batch method described below. and the continuous method. The batch method is a method in which all of the above components are added and mixed in one pot, and then the resulting coating solution is applied to a support, etc. This method allows for quality checks in advance. It has the characteristic that uniform quality can be obtained from the same lot. On the other hand, the continuous method is a method in which the above-mentioned components are sequentially mixed into a pipeline and the coating liquid is applied continuously. It has the characteristics of being efficient and shortening the time required. When producing a heat-developable color photosensitive material such as the one according to the present invention, even if the composition of the photosensitive material is the same, depending on the conditions of the production method, the batch method,
Regardless of the continuous method, it has been pointed out that there is a drawback that the storage stability of heat-developable color photosensitive materials varies significantly. (Objective of the Invention) Therefore, the first object of the present invention is to provide a method for producing a heat-developable color photosensitive material that has excellent stability during production and storage.
An object of the present invention is to provide a method for producing a heat-developable color photosensitive material with stable photographic properties. (Structure of the Invention) The object of the present invention is to provide a coating composition containing at least (a) a photosensitive silver halide, (b) an organic silver salt, (c) a developer, (d) a dye-providing compound, and (e) a binder. In a method for producing a heat-developable color photosensitive material in which a solution is coated on a support, the coating solution is allowed to stagnate at 20 to 60°C for 30 minutes or more, and then the coating solution is coated on the support; After preparing a coating liquid intermediate composition containing at least the organic silver salt and a binder in the liquid, after allowing it to stagnate at 20°C to 60°C for 30 minutes or more, components not contained in the coating liquid intermediate composition are added immediately before coating. This can be achieved by a method for producing a heat-developable color photosensitive material in which the coating solution is added to the intermediate composition and coated on a support. The invention will now be described in more detail. The above-mentioned coating solution of the present invention includes at least all five components: (a) photosensitive silver halide, (b) organic silver salt, (c) developer, (d) dye-providing compound, and (e) binder. The coating liquid intermediate composition refers to at least one of the coating liquids containing the above five components.
refers to something that lacks one ingredient. According to the present invention, the instability during manufacturing or storage, which is influenced by the manufacturing conditions of the heat-developable color photosensitive material, originates from each component of the photosensitive material, and specifically, An organic silver salt having a higher solubility product than photosensitive silver halide, which is an essential component, coexists with photosensitive silver halide having a different solubility product, and also allows a reducing developer to coexist. It takes time to stabilize the coating solution during manufacturing due to the fact that the coating solution is coexisting at the same time as the binder that helps reach equilibrium, and as a result, the stability during manufacturing is hindered. It is believed that According to the present invention, after preparing the coating liquid or coating liquid intermediate composition, 20°C to 60°C, preferably 25°C to
After incubation and stagnation at 50°C for at least 30 minutes, the coating solution is left as it is, and the intermediate composition of the coating solution is coated with the missing components as a coating solution on a support. It was found that the stability during storage was improved. In other words, if the coating solution or intermediate composition of the coating solution for heat-developable color photosensitive materials is kept warm or stagnate after preparation, it will take a long time to stabilize the coating solution if the temperature is below 20°C, and if the coating solution is kept at a temperature of 60°C or above, it is not preferable. High temperatures are disadvantageous because they tend to cause deterioration, decomposition, aggregation, etc. of the coating liquid components. The relationship between temperature (T) and time (t) in the above heat retention and stagnation can be expressed by the following equation. t=b/aT+c (In the formula, a, b, and c each represent a constant) According to the above formula, the relationship between temperature and time during storage and stagnation to maintain the stability of the coating solution is described below. It will happen as you did. (Temperature) (Time) (A) 20°C to 30°C 1 hour to 2 hours (B) 30°C to 35°C 45 minutes to 90 minutes (C) 35°C to 45°C 30 minutes to 60 minutes (D) 45°C ~60℃ 30 minutes Also, the pH of the coating solution during storage and stagnation is usually 3~
9, preferably 4 to 7. Representative examples of embodiments of the present invention include (a) photosensitive silver halide, (b) organic silver salt, (c) developer, (d) dye-providing compound, and (e) binder. It is preferable that the coating liquid formed by mixing the components is coated on the support after being kept warm and stagnant at 20°C to 60°C for 30 minutes or more, but according to the present invention, it is not necessary to apply the above 5.
It is not necessary that all of these components be mixed in the coating solution, and as long as the coating solution or coating solution intermediate composition contains at least a part of an organic silver salt and a binder, the above manufacturing conditions of the present invention, that is, coating After preparing the liquid or coating liquid intermediate composition, 20℃ to 60℃
The stability of photosensitive materials during production and storage can be improved by keeping them warm and stagnant for 30 minutes or more. In such a case, components other than the organic silver salt and binder, such as photosensitive silver halide, developer, dye-providing compound, or other additives, should be added to the coating solution immediately before coating (in-line addition). It's okay. Specifically, a coating solution intermediate composition containing at least a part of (b) an organic silver salt and (e) a binder is kept warm and stagnant, and (a) a photosensitive silver halide, (c) a developer, (d) a method of in-line addition of a dye-providing compound and (f) other additives, a coating solution intermediate containing (b) an organic silver salt, (e) at least a portion of a binder, and (d) a dye-providing compound; Keeps the composition warm;
(b) an organic silver salt; (e) at least a portion of the binder; (d) a dye-providing compound; and (c) A method of insulating and stagnation of a coating solution intermediate composition containing a developer, and adding other components (a) and (f) in-line, at least one of (b) an organic silver salt, and (e) a binder. (d) a dye-providing compound and (a) a coating liquid intermediate composition containing a photosensitive silver halide;
(b) an organic silver salt; (e) at least a portion of the binder; (a) a photosensitive silver halide; and (c) )
A method of insulating and stagnation of a coating solution intermediate composition containing a developer, and adding other components (d) a dye-providing compound and (f) in-line, (a) photosensitive silver halide, (b) There are methods such as keeping the coating solution containing the organic silver salt, (c) developer, (d) dye-providing compound, and (e) binder warm, allowing it to stagnate, and then adding the other component (f) in-line. Embodiments are also included. After being kept warm and stagnant, the coating liquid containing each of the above components is kept at a temperature of 25°C to 50°C, preferably 30°C to 45°C, until it is applied, and immediately after application it is kept at a temperature of 20°C. Thereafter, it is preferably cooled to 0°C to 15°C, and then dried at 20°C or higher, preferably 25°C to 80°C. According to the method of the present invention, it is preferable to gently stir the coating solution or coating solution intermediate composition according to the present invention while it is being kept warm or stagnant. In the method of the present invention, the pots, stirring devices (e.g. propellers, shafts, etc.), valves, etc. used to keep the coating liquid warm and stagnate are coated with glass, high-density polyethylene, or Teflon rather than stainless surfaces. Preferably, it is coated with silicone rubber. In addition, the same consideration as above is required for ultrasonic defoaming equipment, static mixers, filters, pipelines, various detection terminals for packing, etc. It is undesirable for a coating solution consisting of the five components mentioned above to be kept warm or stagnate for more than 12 hours, as this may lead to progress of oxidation-reduction reactions, deterioration of the photosensitive silver halide, aggregation of the dye-providing compound, etc. Application should be completed within 30 minutes. Next, the photosensitive silver halide used in the heat-developable color photosensitive material according to the present invention will be explained in detail.
The photosensitive silver halide used in the present invention includes silver chloride, silver bromide, silver iodide, silver chlorobromide, silver iodobromide, silver chloroiodobromide, etc., and the grain size is 0.01 μm to 1.0 μm. , preferably 0.05 μm to 0.5 μm. The shapes of these silver halides include regular tetrahedrons, regular octahedrons, and tetradecahedrons, but those having at least (1, 1, 1) faces are preferred. It may also be a core-shell type in which the halogen composition is different between the inside and outside of the particle. The photosensitive silver halide according to the present invention is preferably chemically sensitized using a chemical sensitizer.
Chemical sensitizers include sulfur sensitizers, selenium sensitizers, and compounds such as gold, platinum, and palladium, and these can be used alone or in combination. Further, the above-mentioned photosensitive silver halide is preferably spectrally sensitized using a sensitizing dye. As these sensitizing dyes, generally well-known dyes such as cyanine dyes and merocyanine dyes can be used. When forming a layer, the photosensitive silver halide according to the present invention is preferably dispersed in various hydrophilic colloids such as gelatin, various gelatin derivatives, or synthetic polymer compounds. As the photosensitive silver halide used in the present invention, the photosensitive silver halide described in the patent specification filed by the present inventors on December 28, 1983 is particularly preferable. Next, the organic silver salt used in the heat-developable color photosensitive material according to the present invention will be described in detail.
No. 26582, No. 45-18416, No. 45-12700, No. 45
-22185 and JP-A-49-52626, JP-A No. 52-31728
No. 52-13731, No. 52-141222, No. 53-
No. 36224, No. 53-37610, various publications, U.S. Patent No.
Silver salts of aliphatic carboxylic acids such as silver laurate, silver myristate, silver palmitate, silver stearate, silver arachidonate, silver behenate, etc., described in specifications such as No. 3330633 and No. 4168980, etc. Silver aromatic carboxylates, such as silver benzoate, silver phthalate, etc., silver salts having imino groups, such as silver benzotriazole, silver saccharin, silver phthalazinone, silver phthalimide, etc., and silver salts of compounds having mercapto or thione groups, such as 2-mercaptobenzoxazole silver, mercaptooxadiazole silver,
Silver mercaptobenzothiazole, silver 2-mercaptobenzimidazole, silver 3-mercaptophenyl-1,2,4-triazole, and as others 4-hydroxy-6-methyl-1,3,3a,7
-tetrazaindene silver, 5-methyl-7-hydroxy-1,2,3,4,6-pentazaindene silver, and the like. Also, Research Disclosure (RD) 16966, 16907, British Patent No. 1590956,
A silver compound as described in the specification of the same No. 1590957 can also be used. Among these, silver salts having an imino group, such as silver salts of benzotriazole, are preferred, and silver salts of benzotriazole include, for example, silver benzomeriazole, silver alkyl-substituted benzotriazoles such as silver methylbenzotriazole, and silver salts of alkyl-substituted benzotriazoles, such as silver bromobenzotriazole. silver, halogen-substituted benzotriazole silver such as chromium benzotriazole silver, amide-substituted benzotriazole silver such as 5-acetamidobenzotriazole silver, and also British Patent No. 1590956, ibid.
Compounds described in each specification of No. 1590957, such as N-
[6-chloro-4-N(3,5-dichloro-4-hydroxyphenyl)imino-1-oxo-5-methyl-2,5-cyclohexadien-2-yl]
-5-carbamoylbenzotriazole silver salt, 2
-benzotriazole-5-ylazo-4-methoxy-1-naphthol silver salt, 1-benzotriazole-5-ylazo-2-naphthol silver salt, N-
Examples include benzotriazol-5-yl-4-(4-dimethylaminophenylazo)benzamide silver salt. Particularly useful organic silver salts in the present invention are JP-A-58
It has a hydrophilic group as shown in No.-118638. For example, 4-hydroxybenzotriazole silver,
5-Hydroxybenzotriazole silver, 4-sulfobenzotriazole silver, 5-sulfobenzotriazole silver, benzotriazole silver-4-sodium sulfonate, benzotriazole silver-5-sodium sulfonate, benzotriazole silver-4
-Potassium sulfonate, silver benzotriazole-
Potassium 5-sulfonate, silver benzotriazole-4-ammonium sulfonate, silver benzotriazole-5-ammonium sulfonate, silver 4-carboxybenzotriazole, silver 5-carboxybenzotriazole, silver benzotriazole-4
- Sodium carboxylate, silver benzotriazole-5-sodium carboxylate, silver benzotriazole-4-potassium carboxylate, silver benzotriazole-5-potassium carboxylate, silver benzotriazole-4-carboxylate ammonium, silver benzotriazole-5 - ammonium carboxylate,
5-Carbamoylbenzotriazole silver, 4-sulfamoylbenzotriazole silver, 5-carboxy-6-hydroxybenzotriazole silver, 5
-Carboxy-7-sulfobenzotriazole silver, 4-hydroxy-5-sulfobenzotriazole silver, 4-hydroxy-7-sulfobenzotriazole silver, 5,6-dicarboxybenzotriazole silver, 4,6-dihydroxybenzotriazole silver , 4-hydroxy-5-chlorobenzotriazole silver, 4-hydroxy-5-methylbenzotriazole silver, 4-hydroxy-5-methoxybenzotriazole silver, 4-hydroxy-5-nitrobenzotriazole silver, 4-hydroxy-5
-cyanobenzotriazole silver, 4-hydroxy-5-aminobenzotriazole silver, 4-hydroxy-5-acetamidobenzotriazole silver,
4-hydroxy-5-benzenesulfonamide benzotriazole silver, 4-hydroxy-5-hydroxycarbonylmethoxybenzotriazole silver, 4-hydroxy-5-ethoxycarbonylmethoxybenzotriazole silver, 4-hydroxy-
5-Carboxymethylbenzotriazole silver, 4
-hydroxy-5-ethoxycarbonylmethylbenzotriazole silver, 4-hydroxy-5-phenylbenzotriazole silver, 4-hydroxy-5
-(p-nitrophenyl)benzotriazole silver,
4-Hydroxy-5-(p-sulfophenyl)benzotriazole silver, 4-sulfo-5-chlorobenzotriazole silver, 4-sulfo-5-methylbenzotriazole silver, 4-sulfo-5-methoxybenzotriazole silver, 4- Sulfo-5-cyanobenzotriazole silver, 4-sulfo-5-aminobenzotriazole silver, 4-sulfo-5-acetamidobenzotriazole silver, 4-sulfo-5-
benzenesulfonamide benzotriazole silver,
4-Sulfo-5-hydroxycarbonylmethoxybenzotriazole silver, 4-sulfo-5-ethoxycarbonylmethoxybenzotriazole silver, 4
-Hydroxy-5-carboxybenzotriazole silver, 4-sulfo-5-carboxymethylbenzotriazole silver, 4-sulfo-5-ethoxycarbonylmethylbenzotriazole silver, 4-sulfo-5-phenylbenzotriazole silver, 4-sulfo -5-(p-nitrophenyl)benzotriazole silver, 4-sulfo-5-(p-sulfophenyl)
Benzotriazole silver, 4-sulfo-5-methoxy-6-chlorobenzotriazole silver, 4-sulfo-5-chloro-6-carboxybenzotriazole silver, 4-carboxy-5-chlorobenzotriazole silver, 4-carboxy-5 -Methylbenzotriazole silver, 4-carboxy-5-nitrobenzotriazole silver, 4-carboxy-5-aminobenzotriazole silver, 4-carboxy-5-
Methoxybenzotriazole silver, 4-carboxy-5-acetamidobenzotriazole silver, 4-
Carboxy-5-ethoxycarbonylmethoxybenzotriazole silver, 4-carboxy-5-carboxymethylbenzotriazole silver, 4-carboxy-5-phenylbenzotriazole silver, 4-
Carboxy-5-(p-nitrophenyl)benzotriazole silver, 4-carboxy-5-methyl-
Examples include silver 7-sulfobenzotriazole. Even when used alone, these compounds
Two or more types may be used in combination. The organic silver salt according to the present invention may be isolated and used by dispersing it in a binder for a photosensitive layer by an appropriate means, or the silver salt may be prepared in a binder for a photosensitive layer and then used as a monomer. It may be used as is without being separated. The amount of organic silver salt used is 0.05 g per 1 m ² of support.
-10.0g, preferably 0.2g - 5.0g. Furthermore, examples of the developer used in the heat-developable color photosensitive material of the present invention include, for example, U.S. Pat.
3531286, 3761270, 3764328, and RD-12146, RD-15108, RD-
15127 and p described in Japanese Patent Application Laid-Open No. 56-27132, etc.
- Phenylene diamine type and p-aminophenol type developing agents Phosfluoramide phenol type and sulfonamide phenol type developing agents, as well as hydrazone type color developing agents
No. 186744, Patent Application No. 57-122596, No. 57-160698
No. 57-126054, No. 58-33363, No. 58-
Thermal transferable dye-providing substances described in No. 33364 and the like can be advantageously used. Diffusible dyes are released or formed by oxidative coupling of the developer with these thermally transferable dye-providing materials. Also, U.S. Patent No. 3342599, U.S. Patent No. 3719492
Color developing agent precursors described in Japanese Patent Application Laid-open Nos. 53-135628 and 54-79035 can also be advantageously used. In the present invention, the sulfamic acid type developer described in JP-A-56-146133 is particularly useful. Other color methods include, for example, JP-A-57
−179840, No. 57-102487, Patent application No. 57-29648
No. 57-229672, No. 57-225928, etc.
These do not necessarily need to use the above-mentioned developer, and the following developers can be used. That is, phenols (e.g. p-phenylphenol, p-methoxyphenol, 2,6-di-
tert-butyl-p-cresol, N-methyl-p
-aminophenol, etc.), sulfonamidophenols (e.g. 4-benzenesulfonamidophenol, 2-benzenesulfonamidophenol, 2,6-dichloro-4-benzenesulfonamidophenol, 2,6-dibromo-4-(p-
toluenesulfonamide) phenol, etc.), or polyhydroxybenzenes (e.g. hydroquinone, tert-butylhydroquinone, 2,6-dimethylhydroquinone, chlorohydroquinone,
carboxyhydroquinone, catechol, 3-carboxycatechol, etc.), naphthols (e.g. α-naphthol, (β-naphthol, )4-aminonaphthol, 4-methoxynaphthol, etc.), hydroxybinaphthyls and methylene bisnaphthols (e.g. 1, 1'-dihydroxy-2,2'-binaphthyl, 6,6'-dibromo-2,2'-dihydroxy-1,1'-binaphthyl, 6,6'-dinitro-
2,2'-dihydroxy 1,1'-binaphthyl, 4,
4'-dimethoxy-1,1'-dihydroxy-2,
2'-binaphthyl, bis(2-hydroxy-1-naphthyl)methane, etc.), methylenebisphenols (e.g. 1,1-bis(2-hydroxy-3,5
-dimethylphenyl)-3,5,5-trimethylhexane, 1,1-bis(2-hydroxy-3-
tert-butyl-5-methylphenyl)methane,
1,1-bis(2-hydroxy-3,5-di-
tert-butylphenyl)methane, 2,6-methylenebis(2-hydroxy-3-tert-butyl-5
-methylphenyl)-4-methylphenol α-
phenyl-α,α-bis(2-hydroxy-3,
5-di-tert-butylphenyl)methane, α-phenyl-α,α-bis(2-hydroxy-3-
tert-butyl-5-methylphenyl)methane,
1,1-bis(2-hydroxy-3,5-dimethylphenyl)-2-methylpropane, 1,1,5,
5-tetrakis(2-hydroxy-3,5-dimethylphenyl)-2,4-ethylpentane, 2,
2-bis(4-hydroxy-3,5-dimethylphenyl)propane, 2,2-bis(4-hydroxy-3-methyl-5-tert-butylphenyl),
Propane, 2,2-bis(4-hydroxy-3,
5-di-tert-butylphenyl)propane, etc.),
Examples include ascorbic acids, 3-pyrazolidones, pyrazolones, hydrazones and paraphenylenediamines. These developers can be used alone or in combination of two or more. The amount of developer used depends on the type of organic acid silver salt used, the type of photosensitive silver halide, and the types of other additives, but it is usually 0.05 mol per 1 mol of organic acid silver salt. ~
The amount ranges from 10 mol, preferably from 0.1 mol to 3 mol. Examples of dye-providing compounds that can be used in the heat-developable color photosensitive material of the present invention include JP-A-57-179840, JP-A-57-186744, and JP-A-58-116537.
No. 58-123533, No. 57-149046, patent application 1982
−122596, No. 57-160698, No. 57-205447,
No. 57-224883, No. 57-224884, No. 57-229671
No. 57-229647, No. 57-225929, No. 58-
Examples include dye-providing compounds that can be used in diffusion transfer type heat-developable photosensitive materials as described in No. 33363, No. 58-33364, and No. 58-34083. The dye-providing compound preferably used in the present invention is a dye-forming compound and can be represented by the following general formula (). General formula () Cp-X In the formula, Cp represents a coupler residue excluding the hydrogen atom at the active position, and Cp contains a hydrophilic group such as a sulfo group or a carboxy group, or a hydrophilic group other than the active position. It is a coupler residue that does not have a group. X represents a group that can be separated from the coupler during the coupling reaction, and further has one or more hydrophilic groups such as a sulfo group or a carboxy group, or a group containing these hydrophilic groups, and preferably has a straight chain or branched alkyl group having 8 or more carbon atoms. Examples of the coupler residue represented by Cp include those represented by the following general formulas () to (). General formula ()

【formula】 General formula ()

【formula】 General formula ()

【formula】 General formula ()

【formula】 General formula ()

【formula】 General formula ()

[Exemplary dye-providing compound]

The dye-providing compound used in the present invention varies depending on the photothermographic composition, coating conditions, processing method, etc., but is generally 0.01 to 10 moles per mole of organic silver salt.
Used in a mole range, preferably 0.1 mole to 0.2 mole
It is a mole. In addition, polymeric dye-donating compounds such as the following dye-donating substances (13), (14), and (15), which are obtained by adding a polymerizable group to the molecule and polymerizing them alone or with other copolymerization components, can be used. It can also be used. The dye-providing compound used in the present invention is used by being contained in the heat-developable photosensitive layer or other photographic constituent layers.
As described in No. 2322027, it can be dissolved and contained in a high boiling point solvent. Furthermore, in the above dispersion method, the dye-providing compound can be dissolved and contained in the heat-developable photosensitive layer by using a low boiling point solvent in combination with the high boiling point solvent, if necessary. Examples of the above-mentioned high boiling point solvents include di-n-butyl phthalate, tricresyl phosphate, di-octyl phthalate, n-nonylphenol, etc., and examples of low boiling point solvents include methyl acetate, butyl propionate, Known examples include cyclohexanol and diethylene glycol monoacetate. Even if these solvents are used alone,
The dye-donating substance dissolved in the solvent may be an anionic surfactant such as alkylbenzenesulfonic acid and alkylnaphthalenesulfonic acid and/or a nonionic surfactant such as sorbitan monolaurate. It can be mixed with an aqueous solution containing a hydrophilic binder such as gelatin, emulsified and dispersed using a colloid mill or an ultrasonic dispersion device, and added to the heat-developable photosensitive layer. The above-mentioned high boiling point solvent is used in an amount that completely dissolves the dye-providing compound, preferably in a range of 0.05 to 100 parts per part of the dye-providing substance. A preferable dispersion method other than the above is Fischer dispersion. Fischer dispersion refers to dissolving and dispersing a dye-providing substance having a hydrophilic component and a hydrophobic component in the same molecule in an aqueous alkaline solution. For this dissolution and dispersion, an organic solvent compatible with water may be added, heating and stirring (homogenizer, ultrasonic dispersion, etc.) may be performed, or the aid of a surfactant may be used. As the alkali in the alkaline aqueous solution, an inorganic base or an organic base compatible with water can be used, and after dissolving and dispersing the dye-providing substance, the pH can be adjusted as necessary. In this case, an organic or inorganic acid compatible with water can be used as the PH adjuster. The surfactant as a dispersion aid may be an anionic or nonionic surfactant, but anionic surfactants are preferred. Note that the above-mentioned Fisher dispersion is sometimes called Agfa dispersion, and the technical contents described in British Patent No. 45555, British Patent No. 465823, British Patent No. 29897, etc. can be referred to. Regarding the binder used in the heat-developable color photosensitive material according to the present invention, a hydrophilic binder is used as the binder, but a hydrophobic binder may also be used in combination.
The hydrophilic binder in the present invention refers to one that is soluble in water or a mixed solution of water and an organic solvent (a solvent that is optionally miscible with water). For example, proteins such as gelatin, gelatin derivatives, cellulose derivatives, polysaccharites such as dextran, natural substances such as gum arabic, etc. and useful polymers include polyvinyl acetal (preferably with a degree of acetalization of less than 20%, e.g. butyral), polyacrylamide, polyvinylpyrrolidone, ethylcellulose, polyvinyl alcohol (preferably those with a saponification rate of 75% or more), but are not limited to these. If necessary, two or more types may be used in combination. In particular, it is preferable to use a mixture of gelatin or a gelatin derivative and an organic polymeric substance such as polyvinylpyrrolidone or polyvinyl alcohol. The amount of the binder is 1/10 to 10 parts, preferably 1/4 to 4 parts by weight, per 1 part (by weight) of the organic silver salt for each photosensitive layer. The binder used in each layer (hydrophilic colloid) other than the photosensitive layer of the heat-developable color photosensitive material according to the present invention is not particularly limited, and various binders can be used. Any hydrophobic binder can be used depending on the purpose. For example, natural substances such as gelatin, gelatin derivatives, casein, sodium caseinate, proteins such as albumin, cellulose derivatives such as ethyl cellulose, polysaccharites such as dextran, polysaccharides such as agar, gum arabic, gum tragacanth, etc., polyvinyl alcohol, polyvinyl Synthetic polymers such as pyrrolidone, water-soluble polyvinyl acetal, and latex-like vinyl compounds that increase the dimensional stability of photographic materials and synthetic polymers such as those described below may also be included. Suitable synthetic polymers include U.S. Pat.
Examples include those described in the specifications of No. 3220844, No. 3287289, and No. 3411911. Useful polymers include water-insoluble polymers based on alkyl acrylates or methacrylates, acrylic acid, sulfoalkyl acrylates or methacrylates. Suitable polymeric materials include polyvinyl butyral, polyacrylamide, cellulose acetate butyrate,
Cellulose acetate propionate, polymethyl methacrylate, polyvinyl pyrrolidone, polystyrene, ethyl cellulose, polyvinyl chloride, chlorinated rubber polyisobutylene, butadiene styrene copolymer, vinyl chloride-vinyl acetate copolymer, vinyl acetate-vinyl chloride-maleic acid copolymer, polyvinyl Examples include alcohol, polyvinyl acetate, benzyl cellulose, cellulose acetate, cellulose propionate, and cellulose acetate phthalate. If necessary, two or more types may be used in combination. In addition to the above-mentioned components, various additives may be added to the heat-developable color photosensitive material according to the present invention, if necessary. For example, as a development accelerator, U.S. Pat. No. 3,220,846, U.S. Pat.
Specification No. 4060420, No. 4088496, No. 4207392 or RD-15733, No. 15734, No. 15776
Alkali release agent described in et al.
Organic acids described in US Pat. No. 12700, non-aqueous polar solvent compounds having -CO-, -SO ₂ -, -SO- groups described in US Pat. , No. 46-6077, No. 49-5019
No. 49-5020, No. 49-91215, No. 49-
No. 107727, No. 50-2524, No. 50-67132, No. 50
−67641, No. 50-114217, No. 52-33722, No.
No. 52-99813, No. 53-1020, No. 53-55115, No. 53-55115, No.
No. 53-76020, No. 53-125014, No. 54-156523,
No. 54-156524, No. 54-156525, No. 54-156526
No. 55-4060, No. 55-4061, No. 55-32015
West German Patent No. 2140406, West German Patent No. 2147063, West German Patent No. 2220618, and U.S. Patent No.
3080254, 3847612, 3782941, 3994732, 4123282, 4201582, etc. Phthalazinone, phthalimide, pyrazolone, kitazolinone, N- Hydroxynaphthalimide, benzoxazine, naphthoxazinedione, 2,3-dihydro-phthalazinedione, 2,3-dihydro-
1,3-oxazine-2,4-dione, oxypyridine, aminopyridine, hydroxyquinoline,
Aminoquinoline, isocarbostyryl, sulfonamide, 2H-1,3-benzothiazine-2,4
- (3H) dione, benzotriazine, mercaptotriazole, dimercaptotetrazapentalene, phthalic acid, naphthalic acid, phthalamic acid, etc., and mixtures of one or more of these with imidazole compounds, phthalic acid, naphthalic acid Examples include mixtures of at least one acid or acid anhydride such as phthalazine and a phthalazine compound, and combinations of phthalazine and maleic acid, itaconic acid, quinolinic acid, gentisic acid, and the like. Also special request 1987
-73215 and 57-76838,
3-amino-5-mercapto-1,2,4-triazoles and 3-acylamino-5-mercapto-1,2,4-triazoles are also effective. In addition, as antifoggants, for example, Japanese Patent Publication No. 11113/1982, Japanese Patent Publication No. 90118/1973, Japanese Patent Publication No. 49-90118,
No. 10724, No. 49-97613, No. 50-101019, No. 49
-130720, 50-123331, 51-47419,
No. 51-57435, No. 51-78227, No. 51-104338
No. 53-19825, No. 53-20923, No. 51-
No. 50725, No. 51-3223, No. 51-42529, No. 51-
Publications such as No. 81124, No. 54-51821, and No. 55-93149, as well as British Patent No. 1455271 and US Patent No.
3885968, 3700457, 4137079, 4138265, and West German Patent No. 2617907, or oxidizing agents (for example, N-halogen Acetamide, N-
halogenosuccinimides, perchloric acid and its salts, inorganic peroxides, persulfates, etc.), or acids and their salts (such as sulfinic acid, lithium laurate, rosin, diterpene acid, thiosulfonic acid, etc.),
Or sulfur-containing compounds (for example, mercapto compound-releasing compounds, thiouracil, disulfide, simple sulfur, mercapto-1,2,4-triazole, thiazolinthion, polysulfide compounds, etc.), others, oxazoline, 1,2,4-triazole, Examples include compounds such as phthalimide. In addition, as a stabilizer, a printout preventive agent that particularly prevents printout after processing may be used at the same time, for example, JP-A No. 48-45228, No.
Halogenated hydrocarbons described in 119624, 50-120328, 53-46020, etc., specifically tetrabromobutane, tribromoethanol, 2-
Bromo-2-tolylacetamide, 2-bromo-
2-Tolylsulfonylacetamide, 2-tribromomethylsulfonylbenzothiazole, 2,4
-bis(tribromomethyl)-6-methyltriazine and the like. In the present invention, as the hardening agent for the hydrophilic binder, a usual gelatin hardening agent is preferably used, and for example, the following compounds are used. Namely, inorganic salts such as chromium alum and chromium acetate; aldehydes such as formalin, glyoxal and glutaraldehyde; N- such as dimethylolurea and methylolsimethylhydantoin;
Methylols; 2,3-butanedione, 1,2-
Ketones such as cyclopentanedione; Carbamic acids such as dimethylcarbamoylpyridinium chloride; Sulfonic acid esters such as trimethylene bis(methanesulfonate); Sulfonyl halides such as ethylene bis(sulfonyl fluoride); Bis(2-chloroethyl)urea ,
Active halogens such as 2,4-dichloro-6-hydroxy-s-triazine; Mucohalogen acids such as mucochloric acid, mucobromic acid, and mucophenoxychloric acid; Epoxies such as diglycidyl ether; Triethylene melamine, hexane Aziridines such as methylenebis(aziridinylcarboxamide); 1-ethyl-3-(3'-dimethylaminopropyl)carbodiimide hydrochloride; 1,3-bis(acryloyl)urea, divinyl ketone, diacrylamide, 1, Active olefins such as 3,5-triacryloylhexahydro-s-triazine bis(vinylsulfonyl)ether; polymer curing agents having functional groups such as partial esters of polyvinyl alcohol and maleic acid, copolymers of glycidyl acrylate, etc. can be mentioned. Regarding the above curing agent, please refer to JP-A No. 51-78788,
No. 53-139689, No. 56-27135, U.S. Patent
No. 3843372, No. 1870354, No. 2080019, No. 3843372, No. 1870354, No. 2080019, No.
No. 2726162, No. 2870013, No. 2983611, No.
No. 2992109, No. 3047394, No. 3057723, No.
No. 3103437, No. 3321313, No. 3325287, No. 3325287, No. 3321313, No. 3325287, No.
No. 3362827, No. 3543292, British Patent No. 676628, No. 3543292, British Patent No. 676628,
No. 825544, No. 1270578, German Patent No. 672153,
It is described in Japanese Patent Publication No. 1090427, Japanese Patent Publication No. 34-7133, No. 46-1872, and Research, Disclosure, Vol. 176, p. 26 (December 1978). Particularly preferred curing agents include U.S. Pat.
No. 3868257, No. 4088495, No. 4134765, No.
No. 4137082, No. 4161407, JP-A-49-116154,
No. 49-118746, No. 53-57257, No. 53-666960
No. 58-50535, Special Publication No. 47-24259, No. 49-
Examples include compounds having at least two or more vinylsulfonyl groups in the molecule, such as those described in No. 13563. In the heat-developable color photosensitive material according to the present invention, a known thermal solvent may be added in order to adjust the balance of dissolution physical development, color development reaction, and diffusion transfer. The above thermal solvents include urea derivatives,
Examples include amide derivatives, polyethylene glycols, and polyhydric alcohols. In polyethylene glycol, its molecular weight is
106 to 10000 is preferred. Specific examples of urea derivatives include urea, thiourea,
1,3-dimethylurea, 1,3-diethylurea,
Diethylene urea, 1,3-diisopropylurea,
1,3-dibutylurea, 1,1-dimethylurea,
Examples include 1,3-dimethoxyethylurea, 1,3-dimethylthiourea, 1,3-dibutylthiourea, tetramethylthiourea, phenylurea, tetramethylurea, and tetraethylurea. Specific examples of amide derivatives include acetamide,
Propionamide, n-butyramide, 1-butyramide, benzamide, diacetamide, dimethylformamide, acetanilide, ethylacetamide acetate, malonamide, 2-chloropropionamide, 3-chloropropionamide, phthalimide, succinimide, N,N-dimethyl Examples include acetamide. Specific examples of polyhydric alcohols include 1,6-hexanediol, D-xylitol, pentaerythritol, 1,4-cyclohexanediol,
Examples include 1,2-cyclohexanediol, 2,2'-dihydroxybenzophenone, 1,5-pentanediol, and 1,8-octanediol. The content of the thermal solvent in the present invention is 5% to 500%, preferably 10% to 300% of the amount of binder in the photosensitive layer.
It is. These thermal solvents may be used alone or in combination of two or more. Also, JP-A-46-5393, JP-A-50-54329,
Post-treatment may be performed using a sulfur-containing compound as described in each publication of No. 50-77034. Furthermore, U.S. Patent No. 3301678, U.S. Patent No. 3506444
The isothiuronium-based stabilizer precursor described in the specifications of No., No. 3824103, and No. 3844788, or U.S. Patent Nos. 3669670 and 4012260.
It may also contain activator stabilizer precursors and the like as described in No. 4,060,420 and the like. In addition to the above-mentioned components, the heat-developable color photosensitive material of the present invention may further contain spectral sensitizers, antihalation dyes, fluorescent sensitizers, hardeners, antistatic agents, plasticizers, spreading agents, etc. Various additives, coating aids, etc. may be added. The heat-developable photosensitive layer of the heat-developable color photosensitive material according to the present invention basically consists of three layers each having sensitivity to a blue light region, a green light region, and a red light region, namely, a blue-sensitive layer, a green-sensitive layer, Consists of a red-sensitive layer. These layers release and form dyes corresponding to the three primary colors of yellow, magenta, and cyan, respectively, by thermal development. The released and formed dyes are basically yellow in the blue-sensitive layer, magenta in the green-sensitive layer, and cyan in the red-sensitive layer, but the combinations are not necessarily limited to the above combinations. Furthermore, each color-sensitive layer described above may be further divided into two layers with different sensitivities, such as a high-sensitivity layer and a low-sensitivity layer, and may be coated in two layers, or may be further divided into two or more layers and coated in a multilayer manner. It's okay. In addition to the photosensitive layer, the heat-developable color photosensitive element according to the present invention may be provided with various photographic constituent layers such as an overcoat layer, an undercoat layer (subbing layer), a backing layer, an intermediate layer, or a filter layer, depending on the purpose. can. The heat-developable photosensitive layer and other photographic constituent layers according to the present invention can be coated on a wide variety of supports. Supports used in the present invention include plastic films such as cellulose nitrate film, cellulose ester film, polyvinyl acetal film, polyamide film, polyethylene film, polyethylene terephthalate film, and polycarbonate film, metals such as aluminum, glass, and even Paper, baryta paper, synthetic paper, etc. can also be used. Also, among these supports, those with a small thermal expansion/contraction rate are preferred. The heat-developable color photosensitive material of the present invention forms a color image on an image-receiving element by imagewise exposure, development by heat treatment, and thermal transfer to an image-receiving element in a stacked relationship with the photosensitive material. The above-mentioned image receiving element basically only needs to have the function of stopping the transfer of the imagewise distribution of the thermally transferred dye and fixing it. For example, it may simply be a layer of gelatin or other synthetic polymer, or it may be a layer of wood pulp or other synthetic pulp fibers. Also, various mordants may be used. The image-receiving element may also include the image-receiving element on a suitable support, and the support may also serve as the image-receiving element. Furthermore, the image-receiving layer (element) may be formed on the same support as the support of the photosensitive element described above. Further, after the dye image is transferred to the image-receiving element, the image-receiving element may be peeled off, or it may be integrated with the photosensitive layer. Additionally, an optional opacifying layer (reflective layer) can be included, which layer reflects the desired degree of radiation, such as visible light, that can be used to observe the dye image in the receiver element. is used for. The opacifying layer can contain various agents that provide the necessary reflection, such as titanium dioxide. Effective image-receiving elements (which may have a separate support or may also serve as a support) include synthetic polymer films such as polyethylene terephthalate film, polycarbonate film, polyvinyl chloride film, polyvinylidene chloride film, There are papers such as ethyl cellulose film, baryta paper, art paper, ivory paper, and plain paper. Particularly preferred image-receiving elements in the present invention include those having a synthetic polymer layer on a support, such as a polyvinyl chloride layer or a polycarbonate layer on a baryta support;
Some have a polyvinyl chloride layer or a polycarbonate layer provided on a polyethylene terephthalate film support. Regarding the above, please refer to Japanese Patent Application No. 58-97907 and 58-97907.
Described in No. 128600. In addition to the above, polyvinyl chloride containing polyalkylene carbonate disclosed in JP-A-53-246, polychloride containing silicone oil disclosed in JP-A-51-88543 and JP-A-52-40557. Vinyl, and even polyvinyl chloride in which plasticizers are retained by plasma treatment, can also be used as the image-receiving layer according to the present invention. Various exposure means can be used for the heat-developable color photosensitive material according to the present invention. The latent image is obtained by imagewise exposure to radiation, including visible light. In general, a light source used for normal color printing, such as a tungsten lamp, a mercury lamp, a xenon lamp, a laser beam, a CRT or an LED beam, can be used as the light source. The original drawing may be a line image such as a technical drawing, or a photographic image with gradation. Also, printing from the original drawing may be done by contact printing. In addition, images projected by video cameras, etc., and image information sent from television stations can be directly transmitted to CRT or
It is also possible to send the image to OFT, form the image on a heat-developable photosensitive material using a contact lens or a lens, and then print the image. Furthermore, LEDs (light emitting diodes), which have recently seen great progress, are being used as exposure means and display means in various devices. this
It is difficult to create an LED that effectively emits blue light. In this case, to play a color image,
It is sufficient to use LEDs that emit green, red, and infrared light, and to design layers that are sensitive to these lights to provide yellow, magenta, and cyan pigments, respectively. That is, the green light-sensitive layer may contain a yellow dye-providing compound, the red light-sensitive layer may contain a magenta dye-providing compound, and the infrared light-sensitive layer may contain a cyan dye-providing compound. In addition to the above method of directly attaching or projecting the original image, the original image illuminated by a light source can be
It is read by a light-receiving element such as a CCD, is stored in a memory of a computer, etc., and this information is processed as necessary through so-called image processing, and then this image information is reproduced on a CRT and used as an image-like light source. There is also a method of directly causing three types of LEDs to emit light based on the processed information. Thermal transfer from the heat-developable color light-sensitive material according to the present invention to the thermal transfer image-receiving layer (element) is carried out when the heat-developable color light-sensitive material is thermally developed or when it is reheated after heat development is completed. For heating for thermal transfer, all methods applicable to ordinary heat-developable photosensitive materials can be used. For example, by contacting a heated block or plate, by contacting a heated roller or drum, by passing through a high-temperature atmosphere, by using high-frequency heating, and furthermore, by contacting a heat-developable color photosensitive material according to the present invention. It is also possible to provide a conductive layer in the material or in the image-receiving layer (element) for thermal transfer, and utilize Joule heat generated by electricity or a strong magnetic field. There are no particular restrictions on the heating pattern, and preheating is required.
Although methods such as heating again after heating, continuously rising, falling, or repeating heating at a high temperature for a short time or at a low temperature for a long time, and even discontinuous heating are also possible, a simple pattern is preferable. Alternatively, a method in which exposure and heating proceed simultaneously may be used.
Usually, the heating temperature during transfer is 80°C to 200°C, preferably 100°C to 180°C, and the heating time is usually 1 second to 5 minutes, preferably 5 seconds to 3 minutes. Thermal transfer using the heat-developable color photosensitive material according to the present invention can be easily performed using a commercially available heat developing machine. For example, “Image forming 4634 type”
(Sony Tektronix), "Developer Module 277" (3M), "Video Hardcopy Unit NWZ-301" (Japan Radio), etc. can be easily applied. Examples of the present invention are shown below, but the embodiments of the present invention are not limited thereto. Example 1 The following components of a coating solution for a heat-developable color photosensitive material were prepared. (a) Photosensitive silver halide Silver iodobromide (silver bromide 93 mol%) with an average grain size of 0.125μ
silver iodide (7 mol%), the following optical sensitizing dye and 4-
Adding a hydroxy-6-methyl 1,3,3a,7-tetrazaindene stabilizer and further performing sulfur sensitization treatment using sodium thiosulfate,
A photosensitive silver halide emulsion containing 381 g of silver halide (in terms of silver) and 190 g/5000 ml of gelatin was prepared. (sensitizing dye) (b) Organic silver salt 45 g of poly(N-vinylpyrrolidone), 4-
20 g of sulfobenzotriazole and 4.2 g of sodium hydroxide were dissolved, and while stirring, 20 ml of 5N silver nitrate aqueous solution was added, the pH was adjusted to 6 to 8, and water was added to make 400 ml. (c) Developer 27.3 g of poly(N-vinylpyrrolidone) (a small amount of surfactant in an aqueous solution containing 6.2 g of gelatin, 80 g of 1,5-pentanediol, 0.75 g of the following development accelerator, 20 g of the following developer) Add
After dissolving, the pH was adjusted to 7.0 and water was added to make the total volume to 330 ml. (Development accelerator) (Developer) (d) Dye-donating compound 53.8 g of the following dye-donating compound was dissolved in 54 g of dioctyl phthalate and 162 g of ethyl acetate, and a 5% aqueous solution of Alkanol XC (manufactured by DuPont) was added to the solution.
ml of a 3.6% aqueous gelatin solution containing 1,180 ml of gelatin, and used a homogenizer to form an oil-in-water dispersion. (Dye-donating compound) (e) Binder As a binder, poly(N-vinylpyrrolidone) and gelatin were added separately to each of the components (a) to (d). (f) Other additives A reaction product of vinyl sulfone hardener (compound below) and taurine sodium salt (molar ratio 1:0.5) is mixed with water:ethanol = 1:1 (volume %)
It was dissolved in a solution with the composition of (Hardening Agent) C(CH ₂ OCH ₂ SO ₂ CH=CH ₂ ) _4The following coating solution was mixed and prepared using each of the above components. (a) Photosensitive silver halide 142ml (b) Organic silver salt 400ml (c) Developer 330ml (d) Dye-providing compound 700ml After mixing each component (a) to (d), keep it at 35℃±1℃ The pH was adjusted to 5.50 using an aqueous citric acid solution and an aqueous sodium hydroxide solution, and the samples were sequentially coated onto a support according to the sampling method shown in the table below. However, a small amount of the above-mentioned hardener solution (f) was added immediately before coating.

[Table] The above sampling was carried out at a time of 90 ml. After the coating solution was applied and dried, each sample was exposed to 1600 CMS through a step wedge. 8~ on the exposed sample and photographic baryta paper.
The receiver paper with a 10 μm polyvinyl chloride layer is layered on the paper, and the
Heat development was performed at 140℃ for 1 minute using
A dye image was obtained on receiver paper. The minimum density, maximum density and relative sensitivity of the dye image for each sample are shown in Table 2 below.

[Table] From the results shown in the table above, samples according to the present invention in which the stagnation time before application of the coating solution was 30 minutes or more were:
It was found that photographic properties, particularly maximum density and sensitivity, were significantly stabilized compared to comparative samples. Example 2 The amount of organic silver salt (b) used in Example 1 was 26g.
Example 1 except that the developer in (c), 1,5-pentanediol, was replaced with 1,6-hexanediol, and the heat retention stagnation temperature was changed to 40°C.
Coating samples were prepared in exactly the same manner as above, and samples No. 6~
Got 10. The obtained sample was left in an atmosphere of 40° C. and 60% relative humidity for 3 days, then exposed to light and thermally developed, and a forced deterioration test was also conducted. The results obtained are shown in Table 3 below.

[Table] From the results in the table above, the samples obtained by the method of the present invention showed no decrease in maximum density compared to the comparative samples, not only in normal tests but also in forced deterioration tests, and the photographic properties were stabilized. I found out that there was. Example 3 Each component used in Example 2 was
Adjust the pH to 5.5, keep warm, stagnate, and heat according to each method below.
In-line addition and application was performed. Method-1 Mix (b) organic silver salt and (d) dye-providing compound and heat at 35°C.
After incubation and stagnation for one hour, (a) photosensitive silver halide, (c) developer, and (f) hardener as other additives are added in-line and coated. Method-2 (b) Organic silver salt, (d) dye-providing compound, and (c) developer were mixed, and after stagnating at 35°C for 1 hour, (a) photosensitive silver halide, (f) other additives were added. A hardening agent was added in-line and applied. Method-3 (a) Photosensitive silver halide, (b) organic silver salt, and (d) dye-providing compound are mixed, kept warm at 35°C for 1 hour, and then stagnated, (c) developer, (f) etc. A hardener as an additive was added in-line and coated. Method-4 (b) After keeping the organic silver salt at 35℃ for 1 hour and stagnation,
(a) Photosensitive silver halide, (c) developer, (d) dye-providing compound, and (f) hardener as other additives are added in-line and coated. Method-5 (a) Photosensitive silver halide, (d) dye-providing compound are mixed, kept at 35°C for 1 hour, and after stagnation, (b) organic silver salt, (c) developer, (f) others A hardener as an additive was added in-line and coated. Method-6 (a) Photosensitive silver halide, (c) developer, and (d) dye-providing compound were mixed, kept at 35°C for 1 hour, and then stagnated, (b) organic silver salt, (f) others. A hardener as an additive was added in-line and coated. Method-7 (c) Developer, (d) dye-providing compound are mixed, kept at 35°C for 1 hour, and after stagnation, (a) photosensitive silver halide, (b) organic silver salt, (f) others A hardener as an additive was added in-line and coated. However, the items listed above that do not retain heat or stagnate are
The temperature was kept within the range of 10℃ or more and less than 20℃. Samples Nos. 11 to 17 prepared by methods 1 to 7 above were exposed and thermally developed in exactly the same manner as in Example 1, and the standard deviation σn of the relative sensitivity values of the dye images obtained was -1 (n=6) is shown in Table 4 below.

[Table] From Table 4 above, it can be seen that the samples prepared by the method of the present invention have significantly more stable sensitivity characteristics than the samples prepared by methods other than the present invention. (Effect of the invention) After preparing a coating liquid or a coating liquid intermediate composition containing at least a part of an organic silver salt and a binder,
The heat-developable color photosensitive material obtained by coating after stagnation at 20°C to 60°C for 30 minutes or more has extremely stable photographic properties.

Claims (1)

[Claims] 1. Heat development in which a coating solution containing at least (a) photosensitive silver halide, (b) organic silver salt, (c) developer, (d) dye-providing compound, and (e) binder is applied onto a support. In the method for producing a color photosensitive material, the coating solution is allowed to stagnate at 20 to 60° C. for 30 minutes or more, and then the coating solution is coated on a support, or at least the organic silver salt in the coating solution is coated on a support. After preparing the coating liquid intermediate composition containing the binder and
A heat-developable color photosensitive material characterized in that after stagnation at ℃ for 30 minutes or more, components not contained in the intermediate coating composition are added to the intermediate composition of the coating solution immediately before coating and coated on a support. manufacturing method.