JPH0869097A - Heat-developable photosensitive material and image forming method using the material - Google Patents

Abstract

PURPOSE: To obtain a stable image not causing the increase of image and background density after processing even in storage in a light room in a system of forming an image on the photosensitive material by heat development. CONSTITUTION: The heat-developable photosensitive material contains at least a photosensitive silver halide, a reducing agent, a basic precursor, a dye donor to be allowed to release or produce a dye by heat development, and a compound capable of fixing the silver halide and stabilizing it on the same support, and the image is formed and fixed by removing an undeveloped part of the photosensitive silver halide by image-wise exposing it and heat developing it in 80 to 180 deg.C for 0.1 to 60sec or carrying out both of the exposure and the heat development.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light-sensitive material containing a dye-donor substance which releases or produces a dye by heat development.

[0002]

2. Description of the Related Art Photothermographic materials are known, for example, "Basics of Photographic Engineering", Non-silver salt photographic edition (1982, published by Corona Co.), pages 242-255, US Pat.
0,626 and the like. Further, a method of forming a dye image by a coupling reaction between an oxidized product of a developing agent and a coupler is described in US Pat. Nos. 3,761,270 and 4,021,240. Since the photothermographic material using silver halide is superior in photographic properties such as sensitivity and gradation as compared with the electrophotographic method and the diazo photographic method, it is a widely used photographic method. However, in the silver halide light-sensitive material used in this method, the image after development undergoes discoloration or fading under ordinary light rays, or the density of the undeveloped portion increases. This image deterioration is mainly caused by the presence of photosensitive undeveloped silver halide remaining in the light-sensitive material. Therefore, in order to prevent this, the processed light-sensitive material is treated with a film containing a fixing agent. Alternatively, a method of stabilizing treatment with a solution is also disclosed in JP-A-50-543.
No. 29, JP-A-1-161343, etc. On the other hand, the use of a fixing agent as an image stabilizer on the same support of a heat-developable and heat-stabilizable photographic material is disclosed in U.S. Pat. No. 4,012,260 and JP-A-57.
-1500842, 57-154173 and the like. These techniques make it possible to effectively use these compounds in silver halide photographic materials to provide non-photosensitive silver (I) complexes after exposure and processing. Such a complex can impart light stability to the developed image contained in the processed silver halide light-sensitive material. Also, in U.S. Pat. No. 4,238,477,
An example is given in which the coloring material and the fixing agent are used on the same support. It is known that an alkali precursor is used in a light-sensitive material in which an image is formed using a dye-donating compound in order to achieve both rapid image formation and raw storage stability of the light-sensitive material. In a silver halide photothermographic material containing a photosensitive compound to form an image, the color image after processing is greatly increased, and a system satisfying the image stability is not known.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to increase the density of a background portion in a system for obtaining an image on a light-sensitive material by heat development even if the processed image is stored in a bright room. And to obtain a stable image without causing an increase in image density.

[0004]

The above-mentioned object is to provide at least the following components on the same support: A) a photosensitive silver halide B) a reducing agent C) a base precursor D) releasing or producing a dye by heat development. A photothermographic material containing a dye-providing substance and E) a compound capable of fixing and stabilizing silver halide. Further, using this light-sensitive material, an image is formed by thermal development at 80 to 180 ° C. for 0.1 second to 60 seconds after imagewise exposure or at the same time as image exposure. The above objects were achieved by fixing the undeveloped part of the photosensitive silver halide with the fixing agent of component E).

The fixing agent of component E) which can be used in the present invention is
It is a compound that solubilizes silver halide to form a silver complex salt and stabilizes it. The addition amount of the fixing agent is preferably 0.2 to 5 mol per mol of silver, and more preferably 0.5 to 3 mol per mol of silver.

The fixing agent used in the present invention is a compound which solubilizes silver halide and forms a silver complex salt to stabilize it. The fixing agent used in the present invention is preferably a compound having a mercapto group or a thiocarbonyl group in the molecule or a functional group capable of forming it, and more specifically, ammonium thiosulfate, sodium thiosulfate, potassium thiosulfate. In addition to thiosulfates such as sulfate, compounds represented by the following general formula (I) to general formula (V) are preferable.

[0007]

Embedded image

In the general formula (I), R represents an alkyl group substituted with a carboxyl group or a salt thereof, or an aryl group substituted with a carboxyl group or a salt thereof. M represents a hydrogen atom, an alkali metal atom, a (1/2) alkaline earth metal atom, or an ammonium group, or is generally produced by reaction with a base, a nucleophilic reagent, a reducing agent, heating, or a synergistic action of these. It represents a group in which the bond between the sulfur atom of the compound represented by formula (I) and the group represented by M is cleaved.

More specifically, R is an alkyl group or an aryl group substituted with a carboxyl group (or a salt thereof). Carboxyl group (or its salt)
When it is shown in the form where is removed, the alkyl group has 1 carbon atom.
To 30 alkyl groups are preferable, and alkyl groups having 2 to 12 carbon atoms (for example, ethyl group, propyl group, isobutyl group,
3-Methyl-2-butenyl group, cyclohexyl group, octyl group and the like) are particularly preferable. As the aryl group, an aryl group having 6 to 20 carbon atoms (eg, phenyl group, 1-naphthyl group, etc.) is preferable. The sulfur atom of the compound represented by formula (I) and the carboxyl group on R (or a salt thereof) are preferably separated by 1 to 6 carbon atoms, and preferably 2 or 3 carbon atoms. Are particularly preferred, and most preferred are two carbon atoms.

R may be further substituted, and examples of preferred substituents include nitro group, halogen atom (eg chlorine atom, bromine atom, etc.), mercapto group, cyano group, and substituted or unsubstituted alkyl. Group (for example, methyl group, ethyl group, propyl group, methoxyethyl group, methylthioethyl group, dimethylaminoethyl group, trimethylammonioethyl group, carboxymethyl group, carboxyethyl group, carboxypropyl group, sulfoethyl group, sulfomethyl group, Phosphonomethyl group, phosphonoethyl group, etc.), aryl group (eg phenyl group, 4-sulfophenyl group, etc.), alkenyl group (eg allyl group, etc.), cycloalkyl group (eg cyclohexyl group, etc.), alkynyl group (eg, Propargyl group,
Etc.), aralkyl groups (eg benzyl group, 4-methylbenzyl group, etc.), alkoxy groups (eg methoxy group, ethoxy group, methoxyethoxy group, etc.), aryloxy groups (eg phenoxy group, etc.), alkylthio groups ( For example, methylthio group, ethylthio group, etc.), arylthio group (eg, phenylthio group, etc.), sulfonyl group (eg, methanesulfonyl group, p-toluenesulfonyl group,
Etc.), a carbamoyl group (for example, an unsubstituted carbamoyl group,
Methylcarbamoyl group, etc.), thiocarbamoyl group (eg, dimethylthiocarbamoyl group, etc.), sulfamoyl group (eg, unsubstituted sulfamoyl group, methylsulfamoyl group, phenylsulfamoyl group, etc.), carbonamide group (eg, acetamide) Group, benzamide group, methoxypropionamide group, etc.), sulfonamide group (eg, methanesulfonamide group, benzenesulfonamide group, etc.), acyloxy group (eg, acetyloxy group, benzoyloxy group, etc.), sulfonyloxy group ( For example, methanesulfonyloxy group, etc.), ureido group (for example, unsubstituted ureido group, methylureido group, ethylureido group, methoxyethylureido group, etc.), thioureido group (for example, unsubstituted thioureido group, methylthioureido group, methoxy group). Ethyl thioureido group, etc.),
Sulfamoylamino group (eg, unsubstituted sulfamoylamino group, dimethylsulfamoylamino group, etc.), acyl group (eg, acetyl group, 4-methoxybenzoyl group, etc.), thioacyl group (eg, thioacetyl group,
Etc.), heterocyclic groups (for example, 1-morpholino group, 1-piberidino group, 2-pyridyl group, 4-pyridyl group, 2-thienyl group, 1-pyrazolyl group, 1-imidazolyl group, 2-
Tetrahydrofuryl group, tetrahydrothienyl group,
Etc.), oxycarbonyl group (eg methoxycarbonyl group, phenoxycarbonyl group, methoxyethoxycarbonyl group, etc.), oxycarbonylamino group (eg methoxycarbonylamino group, etc.), amino group (eg unsubstituted amino group, dimethylamino group) , Etc.), sulfonic acids or salts thereof, hydroxyl groups and the like.

M is a hydrogen atom, an alkali metal atom (eg sodium atom, potassium atom etc.), (1/2) alkaline earth metal atom (eg (1/2) magnesium atom etc.),
Represents an ammonium atom (for example, ammonium ion, triethylammonium ion, trimethylbenzylammonium ion, etc.), as well as a bond with a sulfur atom by reaction with a base, a nucleophilic reagent, a reducing agent, heating, or their synergistic action. Represents a group capable of being cleaved, and specific examples thereof include transition metal atoms such as (1/2) zinc atom and block groups used in compounds known as precursors known in the photographic industry.

[0012]

Embedded image

In the general formula (II), R ¹ , R ² , R ³ ,
R ⁴ represents an alkyl group, an aryl group, a heterocyclic group, an acyl group or an amino group. R ¹ , R ² , R ³ and R ⁴ may be the same or different, and a plurality of them may be combined to form a ring. In addition, R ² , R
³ and R ⁴ may be hydrogen atoms.

More specifically, R ¹ , R ² ,
The alkyl group represented by R ³ and R ⁴ has 1 to 1 carbon atoms.
An alkyl group of 30 is preferable, and an alkyl group having 2 to 12 carbon atoms (eg ethyl group, propyl group, isobutyl group, 3
-Methyl-2-butenyl group, cyclohexyl group, octyl group and the like) are particularly preferable. As the aryl group, an aryl group having 6 to 20 carbon atoms (eg, phenyl group, 1-naphthyl group, etc.) is preferable. Heterocyclic group having 4 to 4 carbon atoms
20 heterocycles (eg, 1-morpholino group, 2-pyridyl group, 2-thienyl group, 3-quinolyl group, etc.) are preferable. The acyl group is preferably an acyl group having 1 to 20 carbon atoms (eg, methoxyacetyl group, benzoyl group, etc.), and the amino group is preferably an unsubstituted amino group or a substituted amino group (eg, dimethylamino group, anilino group, etc.).

Further, R ¹ , R ² , R ³ and R ⁴ may be further substituted, and examples of preferable substituents include the groups mentioned as the substituent of R in the general formula (I) and carboxylic acid. Or its salt is mentioned.

[0016]

[Chemical 3]

[0017] In the general formula (III) and the general formula (IV), Z represents a carbon atom, a nitrogen atom, an oxygen atom, a 5 or 6-membered ring composed of a sulfur atom or a selenium atom, X ^- is -O ^- , -S ^-, or -N - represents the ^R (where R represents an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group or a heterocyclic group). X'is an oxygen atom, a sulfur atom, -N
R- (where R is as defined above) represents, Q ^- represents a counter anion. M represents a group in which the bond with X ′ is cleaved by the reaction with a base, a nucleophilic reagent, a reducing agent, heating, or a synergistic action of these. Among these, compounds represented by the following general formula (IIIa) or general formula (IVa) are more preferable.

[0018]

[Chemical 4]

In these formulas, R ₁ and R ₂ are alkyl groups,
It represents a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group or a heterocyclic group. However, R ₂ may be a hydrogen atom. Y is -O-, -S-,
Represents —N (R ₃ ) —, R ₃ is an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group, an amino group, an acylamino group, a sulfonamide group, a ureido group or a sulfamoylamino group. Represents a group. R ₁ and R ₂ , and R ₂ and R ₃ may be bonded to each other to form a ring. Q ⁻ represents a counter anion, and M represents a group in which the bond with the sulfur atom is cleaved by a reaction with a base, a nucleophilic reagent, a reducing agent, heating, or a synergistic action thereof. Next, general formula (III) and general formula (IV) will be described in detail. The 5-membered heterocycle represented by Z includes imidazoliums, pyrazoliums, oxazoliums, thiazoliums, triazoliums,
Tetrazolium, thiadiazolium, oxadiazolium, thiatriazolium, oxatriazolium, etc. are mentioned. R is a substituted or unsubstituted alkyl group (eg, methyl group, ethyl group, n-propyl group,
n-butyl group, isopropyl group, n-octyl group, carboxyethyl group, ethoxycarbonylmethyl group, dimethylaminoethyl group, etc.), substituted or unsubstituted cycloalkyl group (eg cyclohexyl group, 4-methylcyclohexyl group, etc.) ), A substituted or unsubstituted alkenyl group (eg, propenyl group, etc.), a substituted or unsubstituted alkynyl group (eg, propargyl group, 1-methylpropargyl group, etc.), a substituted or unsubstituted aralkyl group (eg, benzyl group, 4-methoxybenzyl group, etc.),
A substituted or unsubstituted aryl group (eg, a phenyl group,
3-methoxyphenyl group, etc.), a substituted or unsubstituted heterocyclic group (for example, pyridyl group, imidazolyl group, morpholino group, triazolyl group, tetrazolyl group, thienyl group,
Etc.).

The heterocycle represented by Z is a nitro group,
Halogen atom (eg chlorine atom, bromine atom, etc.), mercapto group, cyano group, substituted or unsubstituted alkyl group (eg, methyl group, ethyl group, propyl group, methoxyethyl group, methylthioethyl group, dimethylaminoethyl group) , Trimethylammonioethyl group, carboxymethyl group, carboxyethyl group, carboxypropyl group, sulfoethyl group, sulfomethyl group, phosphonomethyl group, phosphonoethyl group, etc.), aryl group (for example, phenyl group, 4-sulfophenyl group, etc.), Alkenyl group (eg allyl group etc.), cycloalkyl group (eg cyclohexyl group etc.), alkenyl group (eg propargyl group etc.), aralkyl group (eg benzyl group, 4-
Methylbenzyl group, etc.), alkoxy group (eg methoxy group, ethoxy group, methoxyethoxy group, etc.), aryloxy group (eg phenoxy group, etc.), alkylthio group (eg methylthio group, ethylthio group, etc.), arylthio group (Eg, phenylthio group, etc.), sulfonyl group (eg, methanesulfonyl group, p-toluenesulfonyl group, etc.), carbamoyl group (eg, unsubstituted carbamoyl group, methylcarbamoyl group, etc.), thiocarbamoyl group (eg, dimethylthiocarbamoyl group) , Etc.), sulfamoyl group (eg, unsubstituted sulfamoyl group, methylsulfamoyl group, phenylsulfamoyl group, etc.), carbonamide group (eg, acetamide group, benzamide group, methoxypropionamide group, etc.), sulfonamide group (Eg methane Rufonamide group, benzenesulfonamide group, etc.), acyloxy group (eg acetyloxy group, benzoyloxy group, etc.), sulfonyloxy group (eg methanesulfonyloxy group, etc.), ureido group (eg unsubstituted ureido group, methyl) Ureido group, ethylureido group, methoxyethylureido group, etc.), thioureido group (eg, unsubstituted thioureido group, methylthioureido group, methoxyethylthioureido group,
Etc.), a sulfamoylamino group (for example, an unsubstituted sulfamoylamino group, a dimethylsulfamoylamino group,
Etc.), an acyl group (eg acetyl group, 4-methoxybenzoyl group, etc.), a thioacyl group (eg thioacetyl group, etc.), a heterocyclic group (eg 1-morpholino group, 1-
Piperidino group, 2-pyridyl group, 4-pyridyl group, 2-
Thienyl group, 1-pyrazolyl group, 1-imidazolyl group,
2-tetrahydrofuryl group, tetrahydrothienyl group,
Etc.), oxycarbonyl group (eg methoxycarbonyl group, phenoxycarbonyl group, methoxyethoxycarbonyl group, etc.), oxycarbonylamino group (eg methoxycarbonylamino group, etc.), amino group (eg unsubstituted amino group, dimethylamino group) , Etc.), a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a hydroxyl group and the like.

Further, the compounds represented by the general formulas (III) and (IV) may form salts (for example, acetate, nitrate, salicylate, hydrochloride, iodate, bromate, etc.). . In formula (III), X ⁻ preferably represents —S ⁻ . In formula (IV), X'preferably represents a sulfur atom. M represents a group capable of cleaving the bond with X ′ by reaction with a base, a nucleophilic reagent, a reducing agent, heating, or a synergistic action of these, and specifically, (1/2) zinc Examples thereof include transition metal atoms such as atoms, and blocking groups used in compounds known as precursors known in the photographic industry.
Q ⁻ is a counter anion, but is preferably a halide ion (eg Cl ⁻ , Br ⁻ etc.), BF ₄ ⁻ , P
F ₆ ^-, alkyl or aryl sulfonate ions,
It represents a monoalkyl or monoaryl sulfate ion or the like. The compounds represented by the general formula (IIIa) and the general formula (IVa) will be described in detail. In the formula, R ₁ and R
₂ is a substituted or unsubstituted alkyl group (eg, methyl group, ethyl group, n-propyl group, t-butyl group, methoxyethyl group, methylthioethyl group, dimethylaminoethyl group, morpholinoethyl group, dimethylaminoethylthioethyl group) , Diethylaminoethyl group, aminoethyl group,
Methylthiomethyl group, trimethylammonioethyl group,
Carboxymethyl group, carboxyethyl group, carboxypropyl group, sulfoethyl group, sulfomethyl group, phosphonomethyl group, phosphonoethyl group, etc.), a substituted or unsubstituted cycloalkyl group (eg, cyclohexyl group,
Cyclopentyl group, 2-methylcyclohexyl group,
Etc.), a substituted or unsubstituted alkenyl group (eg, allyl group, 2-methylallyl group, etc.), a substituted or unsubstituted alkynyl group (eg, propargyl group, etc.), a substituted or unsubstituted aralkyl group (eg, benzyl group) , Phenethyl group, 4-methoxybenzyl group, etc.), aryl group (for example, phenyl group, naphthyl group, 4-methylphenyl group, 4-methoxyphenyl group, 4-carboxyphenyl group, 4-sulfophenyl group, etc.) or A substituted or unsubstituted heterocyclic group (eg, 2-pyridyl group, 3-pyridyl group, 4-pyridyl group, 2-thienyl group, 1-pyrazolyl group, 1-imidazolyl group, 2-tetrahydrofuryl group, etc.) Represent. However, R ₂ may be a hydrogen atom.

R ₃ is a substituted or unsubstituted alkyl group (eg, methyl group, ethyl group, n-propyl group, t-butyl group, methoxyethyl group, methylthioethyl group, dimethylaminoethyl group, morpholinoethyl group, dimethylamino group). Ethylthioethyl group, diethylaminoethyl group, aminoethyl group, methylthiomethyl group, trimethylammonioethyl group, carboxymethyl group, carboxyethyl group, carboxypropyl group, sulfoethyl group, sulfomethyl group, phosphonomethyl group, phosphonoethyl group, etc.),
Substituted or unsubstituted cycloalkyl group (eg, cyclohexyl group, cyclopentyl group, 2-methylcyclohexyl group, etc.), substituted or unsubstituted alkenyl group (eg, allyl group, 2-methylallyl group, etc.), substituted or unsubstituted An alkynyl group (eg, propargyl group,
Etc.), a substituted or unsubstituted aralkyl group (eg, benzyl group, phenethyl group, 4-methoxybenzyl group,
Etc.), aryl groups (eg phenyl group, naphthyl group, 4
-Methylphenyl group, 4-methoxyphenyl group, 4-carboxyphenyl group, 4-sulfophenyl group, etc.) or a substituted or unsubstituted heterocyclic group (eg, 2-pyridyl group, 3-pyridyl group, 4-pyridyl group) Group, 2-thienyl group, 1-pyrazolyl group, 1-imidazolyl group, 2-tetrahydrofuryl group, etc.), substituted or unsubstituted amino group (eg, unsubstituted amino group, dimethylamino group, methylamino group, etc.) , An acylamino group (eg, acetylamino group, benzoylamino group, methoxypropionylamino group, etc.), sulfonamide group (eg, methanesulfonamide group, benzenesulfonamide group, 4-toluenesulfonamide group, etc.), ureido group (eg, , Unsubstituted ureido group, 3-methylureido group, etc.), sulfamoylamino group (eg, In unsubstituted sulfamoylamino group,
3-methylsulfamoylamino group, etc.). In the general formula (IIIa) and the general formula (IVa), preferably Y represents —N (R ₃ ) —, R ₁ and R ₃ are a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted Alternatively, it represents an unsubstituted alkynyl group or a substituted or unsubstituted heterocyclic group. R ₂ is preferably a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, or a substituted or unsubstituted heterocyclic group. Preferred embodiments of M and Q ⁻ in general formula (IVa) are the same as in general formula (IV).

[0023]

[Chemical 5]

In the general formula (V), Q represents an atomic group necessary for forming a 5- or 6-membered heterocycle composed of at least one atom selected from carbon atom, nitrogen atom, oxygen atom and selenium atom. . The heterocycle may be fused with a carbon aromatic ring or a heteroaromatic ring. M is a hydrogen atom,
Represents an alkali metal atom, a (1/2) alkaline earth metal atom, an ammonium group, or by reacting with a base, a nucleophilic reagent, a reducing agent, heating, or a synergistic action of these, in the general formula (V) It represents a group in which the bond between the sulfur atom of the compound represented and the group represented by M is cleaved.

The compound represented by the general formula (V) will be described in detail. M is a hydrogen atom, an alkali metal atom (eg, sodium atom, potassium atom, etc.), (1/2) alkaline earth metal atom (eg, (1/2) magnesium atom, etc.), an ammonium atom (eg, ammonium ion,
(Triethylammonium ion, trimethylbenzylammonium ion, etc.), as well as a group capable of cleaving the bond with a sulfur atom by reaction with a base or a nucleophilic reagent, heating, or a synergistic action of these,
Specific examples thereof include transition metal atoms such as (1/2) zinc atom and block groups used in compounds known as precursors known in the photographic industry.

The heterocyclic ring formed by Q, N and C is, for example, tetrazole, triazole, imidazole, thiadiazole, oxadiazole, selenadiazole, oxazole, thiazole, benzoxazole, benz. Examples thereof include thiazoles, benzimidazoles, pyrimidines and the like. Further, these heterocycles include a nitro group, a halogen atom (eg, chlorine atom, bromine atom, etc.), a mercapto group, a cyano group, and a substituted or unsubstituted alkyl group (eg, methyl group, ethyl group, propyl group, t- Butyl group, methoxyethyl group, methylthioethyl group, dimethylaminoethyl group, morpholinoethyl group, dimethylaminoethylthioethyl group, diethylaminoethyl group, dimethylaminopropyl group, dipropylaminoethyl group, dimethylaminohexyl group, methylthiomethyl group , Methoxyethoxyethoxyethyl group, trimethylammonioethyl group, cyanoethyl group,
Etc.), aryl groups (for example, phenyl group, 4-methanesulfonamidophenyl group, 4-methylphenyl group, 3-methoxyphenyl group, 4-dimethylaminophenyl group,
3,4-dichlorophenyl group, naphthyl group, etc.), alkenyl group (eg, allyl group, etc.), aralkyl group (eg, benzyl group, 4-methylbenzyl group, phenethyl group,
4-methoxybenzyl group, etc.), alkoxy group (eg methoxy group, ethoxy group, methoxyethoxy group, methylthioethoxy group, dimethylaminoethoxy group, etc.), aryloxy group (eg phenoxy group, 4-methoxyphenoxy group, etc.) ), Alkylthio groups (eg, methylthio group, ethylthio group, propylthio group, methylthioethyl group, dimethylaminoethylthio group, methoxyethylthio group, morpholinoethylthio group, dimethylaminopropylthio group, piperidinoethylthio group, pyrrolidino) Ethylthio group, morpholinoethylthioethylthio group, imidazolylethylthio group, 2-pyridylmethylthio group, diethylaminoethylthio group, etc.), arylthio group (for example, phenylthio group, 4-dimethylaminophenylthio group,
Etc.), heterocyclic oxy group (for example, 2-pyridyloxy group, 2-imidazolyloxy group, etc.), heterocyclic thio group (for example, 2-benzthiazolylthio group, 4-pyrazolylthio group, etc.), sulfonyl group ( For example, methanesulfonyl group, ethanesulfonyl group, p-toluenesulfonyl group,
Methoxyethylsulfonyl group, dimethylaminoethylsulfonyl group, etc.), carbamoyl group (for example, unsubstituted carbamoyl group, methylcarbamoyl group, dimethylaminoethylcarbamoyl group, methoxyethylcarbamoyl group,
Morpholinoethylcarbamoyl group, methylthioethylcarbamoyl group, phenylcarbamoyl group, etc.), sulfamoyl group (eg unsubstituted sulfamoyl group, methylsulfamoyl group, imidazolylethylsulfamoyl group, phenylsulfamoyl group, etc.), carbonamide Group (eg, acetamide group, benzamide group, methoxypropionamide group, dimethylaminopropionamide group, etc.), sulfonamide group (eg, methanesulfonamide group, benzenesulfonamide group, p-toluenesulfonamide group, etc.), acyloxy group (Eg, acetyloxy group, benzoyloxy group, etc.), sulfonyloxy group (eg, methanesulfonyloxy group, etc.), ureido group (eg, unsubstituted ureido group, methylureido group, etc.),
Ethylureido group, methoxyethylureido group, dimethylaminopropylureido group, methylthioethylureido group, morpholinoethylureido group, phenylureido group, etc., thioureido group (for example, unsubstituted thioureido group, methylthioureido group, methoxyethylureido group) , Etc.), acyl groups (eg acetyl group, benzoyl group, 4-methoxybenzoyl group, etc.), heterocyclic groups (eg 1-morpholino group, 1-piperidino group, 2-pyridyl group, 4-pyridyl group, 2- Thienyl group, 1-pyrazolyl group, 1-imidazolyl group, 2-tetrahydrofuryl group, tetrahydrothienyl group, etc.), oxycarbonyl group (for example, methoxycarbonyl group, phenoxycarbonyl group, methoxyethoxycarbonyl group, methylthioethoxycarbonyl group, methylthioethoxy group, Ethoxy ethoxyethoxy group, dimethylaminoethoxy group,
Morpholino ethoxycarbonyl group, etc.), oxycarbonylamino group (eg methoxycarbonylamino group, phenoxycarbonylamino group, 2-ethylhexyloxycarbonylamino group, etc.), amino group (eg unsubstituted amino group, dimethylamino group, methoxyethyl) Amino group, anilino group, etc.), carboxylic acid or salt thereof, sulfonic acid or salt thereof, hydroxyl group and the like. Preferred heterocycles are triazoles,
Examples include tetrazoles and thiadiazoles. Specific examples of the fixing agent used in the present invention are shown below.

[0027]

[Chemical 6]

[0028]

[Chemical 7]

[0029]

Embedded image

[0030]

[Chemical 9]

[0031]

[Chemical 10]

[0032]

[Chemical 11]

[0033]

[Chemical 12]

[0034]

[Chemical 13]

[0035]

Embedded image

[0036]

[Chemical 15]

[0037]

Embedded image

[0038]

[Chemical 17]

The compounds represented by the above general formulas (I) to (V) of the present invention are known, and the journal of heterocyclic chemistry (J. Heterocyclic Che).
m.) 2, 105 (1965), Journal of Organic Chemistry (J. Org. Chem.) 32, 2245.
(1967), Journal of Chemical Society (J.Chem.Soc.) 3799 (1969), Journal of American Chemical Society (J.Am.C).
hem.Soc.) 80, 1895 (1958), Chemical Communication (Chem.Commun.) 1222 (197)
1), Tetrahedron Lett.
2939 (1972), JP 60-87322, Berichte der Deutschen Chemischen Gesellsc.
haft) 38, 4049 (1905), Journal of Chemical Society Chemical Communication (J.Chem.Soc.Chem.Commun.) 1224 (197).
1), JP-A-60-122936, JP-A-60-11
7240, Advances in Heterocyclic Chemist
ry) 19, 1 (1976), Tetrahedron Letters 5881 (1968), Journal of Heterocyclic Chemistry (J. He).
5, 277 (1968), Journal of Chemical Society Perkin Transaction I (J. Chem. Soc. Perkin Trans. I) 627.
(1974), Tetrahedro
n Letters) 1809 (1976) and 1578 (197).
1), Journal of Chemical Society (J.
Chem. Soc.) 899 (1935), ibid 2865 (195)
9), Journal of Organic Chemistry (J.Org.Chem.) 30, 567 (1965), Japanese Patent Publication 40
-28496, JP-A-50-89034, U.S. Pat. Nos. 3,106,467, 3,420,670, 2,271,229, 3,137,578, and 3,148. 066, 3,511,663, 3,060,028, 3,271,154, 3,251,691, 3,598,599, 3,148,066. JP-B-43-4135, U.S. Pat. Nos. 3,615,616 and 3,420,664,
Easily synthesized by the method described in No. 3,071,465, No. 2,444,605, No. 2,444,606, No. 2,444,607, No. 2,935,404, etc. it can.

The fixing agent used in the present invention is preferably added to the light-sensitive material in a form that does not affect the light-sensitive silver halide before heat development. Specifically, a solid dispersion of a poorly soluble fixing agent in water can be added to the same layer as the photosensitive silver halide or to an adjacent layer. Alternatively, a water resistant barrier layer may be sandwiched between the emulsion layer and added to another layer. In this case, the fixing agent may be water-soluble or sparingly soluble in water. As a water resistant barrier layer, polyvinyl acetate, polyethylene vinyl acetate,
It is preferable to use a water-resistant polymer compound such as polystyrene-butadiene-copolymer and polyacrylic acid ester. It is also preferable to use the polysulfonamide described in US Pat. No. 4,283,477. As for the physical properties of the polymer compound used for the water resistant barrier layer, it is preferable that Tg is 80 ° C. or lower and the softening temperature is 150 ° C. or lower. A polymer compound layer is applied by applying an organic solvent solution of these polymer compounds (methylene chloride, acetone, toluene, etc. can be used as a solvent) between the fixing agent-containing layer and the photosensitive silver halide layer. You can do it. Further, it is also possible to apply a latex aqueous solution of the above-mentioned polymer compound and form a film by heating to form a water resistant layer.

The silver halide emulsion which can be used in the present invention is
It may be any of silver chloride, silver bromide, silver iodobromide, silver chlorobromide, silver chloroiodide and silver chloroiodobromide. The silver halide emulsion used in the present invention may be a surface latent image type emulsion or an internal latent image type emulsion. The internal latent image type emulsion is used as a direct reversal emulsion in combination with a nucleating agent or an optical fogging. Also,
It may be a so-called core-shell emulsion in which the inside of the grain and the surface layer of the grain have different phases, or silver halide having a different composition may be joined by epitaxial joining. The silver halide emulsion may be either monodisperse or polydisperse, and the method of mixing the monodisperse emulsions and adjusting the gradation as described in JP-A-1-167,743 and 4-223,643 is preferably used. . The particle size is preferably 0.1 to 2 .mu.m, more preferably 0.2 to 1.5 .mu.m. The crystal habit of silver halide grains is one having a regular crystal such as a cube, octahedron, or tetrahedron, a sphere, an irregular crystal system such as a flat plate having a high aspect ratio, or a twin plane. Any of those having such a crystal defect, a composite system thereof or the like may be used. Specifically, US Pat. No. 4,500,626
No. 50, No. 4,628,021, Research Disclosure (hereinafter abbreviated as RD) No. 17,0
29 (1978), No. 17,643 (December 1978), pages 22-23, No. 18,716 (1979).
Nov., 648, same No. 307, 105 (198)
Nov. 9, pp. 863-865, JP-A-62-253,
159, 64-13,546, JP-A-2-23.
No. 6,546, No. 3-110,555, and Graphide, "Physics and Chemistry of Photography", published by Pall Monte (P.Gl.
afkides, Chemieet Phisique Photographique, Paul Mont
el, 1967), "Photoemulsion Chemistry" by Duffin, published by Focal Press (GFDuffin, Photographic Emulsion Chemi
Stry, Focal Press, 1966), "Production and coating of photographic emulsions" by Zelikmann et al., published by Focal Press (VLZelikman).
et al., Making and Coating Photographic Emulsion,
Any of the silver halide emulsions prepared by the method described in FocalPress, 1964) can be used.

In the process of preparing the light-sensitive silver halide emulsion of the present invention, it is preferable to carry out so-called desalting to remove excess salt. As a means for this, a Nudel water washing method in which gelatin is gelled may be used, and inorganic salts (for example, sodium sulfate) composed of polyvalent anions, anionic surfactants, anionic polymers (for example, polystyrene sulfonic acid). The precipitation method using sodium) or a gelatin derivative (eg, aliphatic acylated gelatin, aromatic acylated gelatin, aromatic carbamoylated gelatin, etc.) may be used. The sedimentation method is preferably used.

The photosensitive silver halide emulsion used in the present invention may contain heavy metals such as iridium, rhodium, platinum, cadmium, zinc, thallium, lead, iron, osmium and chromium for various purposes. These compounds may be used alone or in combination of two or more kinds. Further, these compounds can be added in the form of salts such as chlorides, bromides and cyanides, and various complex salts. The addition amount depends on the purpose of use, but is generally about 10 ^-9 to 10 ^-3 mol per mol of silver halide.
When it is contained, it may be evenly added to the particles,
It may also be localized inside or on the surface of the particles. Specifically, JP-A-2-236,542 and 1-116,63.
No. 7, Japanese Patent Application No. 4-126,629 and the like are preferably used.

In the step of forming grains of the light-sensitive silver halide emulsion of the present invention, rhodan salt, ammonia, 4-substituted thioether compound or JP-B No. 47-1 is used as a silver halide solvent.
The organic thioether derivatives described in 1,386 or the sulfur-containing compounds described in JP-A-53-144,319 can be used.

For other conditions, see Graphide, "Physics and Chemistry of Photography," published by Paul Monte (P.Glaf).
kides, Chemie et Phisique Photographique, Paul Mont
el, 1967), "Photoemulsion Chemistry" by Duffin, published by Focal Press (GFDuffin, Photographic Emulsion Chemi
Stry, Focal Press, 1966), "Manufacturing and coating of photographic emulsions" by Zelikmann et al., published by Focal Press (VLZelikman).
et al., Making and Coating Photographic Emulsion,
Focal Press, 1964) etc. should be referred to. That is, any of the acidic method, the neutral method, and the ammonia method may be used,
As the method of reacting the soluble silver salt and the soluble halogen salt, any of a one-sided mixing method, a simultaneous mixing method and a combination thereof may be used. The double jet method is preferably used to obtain a monodisperse emulsion. A back mixing method in which the grains are formed in the presence of excess silver ions can also be used.
A so-called controlled double jet method, in which pAg in the liquid phase in which silver halide is produced is kept constant, can also be used as one form of the simultaneous mixing method.

Further, in order to accelerate the grain growth, the addition concentration, the addition amount, and the addition rate of the silver salt and the halogen salt to be added may be increased (JP-A-55-142,329, JP-A-55-158). 124, U.S. Pat. No. 3,650,75
No. 7). Further, the stirring method of the reaction liquid may be any known stirring method. Further, the temperature and pH of the reaction solution during the formation of silver halide grains may be set arbitrarily according to the purpose. The preferred pH range is 2.2 to 8.5, more preferably 2.5 to 7.5.

The photosensitive silver halide emulsion is usually a chemically sensitized silver halide emulsion. For the chemical sensitization of the photosensitive silver halide emulsion of the present invention, a chalcogen sensitizing method such as a sulfur sensitizing method, a selenium sensitizing method, a tellurium sensitizing method, or the like, which is known in emulsions for conventional light-sensitive materials, gold, platinum, A noble metal sensitization method using palladium or the like and a reduction sensitization method can be used alone or in combination (for example, JP-A-3-110,55).
No. 5, Japanese Patent Application No. 4-75,798, etc.). These chemical sensitizations can also be carried out in the presence of a nitrogen-containing heterocyclic compound (JP-A-62-253,159). Further, an antifoggant described below can be added after the completion of the chemical sensitization. Specifically, JP-A-5-45,833 and JP-A-62-4
The method described in No. 0,446 can be used. The pH during chemical sensitization is preferably 5.3 to 10.5, more preferably 5.5 to 8.5, and pAg is preferably 6.0.
˜10.5, more preferably 6.8 to 9.0. The coating amount of the photosensitive silver halide emulsion used in the present invention is in the range of 1 mg to 10 g / m ² in terms of silver.

In order to give the light-sensitive silver halide used in the present invention green, red and infrared sensitivities, the light-sensitive silver halide emulsion is spectrally sensitized with a methine dye or the like. . Further, if necessary, the blue-sensitive emulsion may be spectrally sensitized in the blue region. The dyes used include cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes, hemin anine dyes, styryl dyes and hemioxonol dyes. Specifically, US Pat.
617,257, JP-A-59-180,550, JP-A-64-13,546, JP-A-5-45,828 and JP-A-5-45,834. These sensitizing dyes may be used alone, or a combination thereof may be used, and the combination of sensitizing dyes is often used particularly for the purpose of supersensitization or wavelength adjustment of spectral sensitivity. Along with the sensitizing dye, a dye having no spectral sensitizing effect itself or a compound that does not substantially absorb visible light and exhibits supersensitization may be contained in the emulsion (for example, US Pat. 615, 641 and those described in JP-A-63-23, 145). These sensitizing dyes may be added to the emulsion at the time of chemical ripening or before or after the chemical ripening, or according to U.S. Pat. Nos. 4,183,756 and 4,225,666 before and after the nucleation of silver halide grains. Good. Further, these sensitizing dyes and supersensitizers may be added in a solution of an organic solvent such as methanol, a dispersion of gelatin or a solution of a surfactant. The addition amount is generally 10 ^-8 to 10 per mol of silver halide.
^-It is about ² mol.

Additives used in such steps and known photographic additives usable in the photothermographic material and dye fixing material of the present invention are described in the above-mentioned RD No. 17,643 and the same.
It is described in No. 18,716 and No. 307,105, and the corresponding parts are summarized in the table below. Types of additives RD17643 RD18716 RD307105 1. Chemical sensitizer, page 23, page 648, right column, page 866 2. Sensitivity enhancer, page 648, right column 3. Spectral sensitizer, page 23-24, page 648, right column, pages 866-868 Supercolor Sensitizer: page 649, right column 4. Fluorescent brightener, page 24, page 648, right column, page 868, 5. Fogging prevention, page 24-25, page 649, right column, page 868-870, stabilizer, light absorber, 25 Page 26 Page 649 Right column Page 873 Filter to page 650 Left column Dye, UV absorber 7. Dye image Page 25 650 Page left column 872 Stabilizer 8. Hardener 26 Page 651 Left column 874 to 875 Page 9 .Binder page 26 page 651 left column page 873 to 874 10. plasticizer, page 27 650 page right column 876 lubricant 11. coating aid, page 26 to 27 page 650 right column 875 to 876 surfactant 1 2. Static, page 27, page 650, right column, pages 876-877, inhibitor 13. Matting agent, pages 878-879

A hydrophilic binder is preferably used as the binder of the constituent layers of the photothermographic material. Examples thereof include Research Disclosure mentioned above and JP-A-64-
Examples include the woods described on pages (71) to (75) of No. 13,546. Specifically, a transparent or translucent hydrophilic binder is preferable, and for example, gelatin, proteins such as gelatin derivatives or cellulose derivatives, natural compounds such as starch, gum arabic, dextran, and polysaccharides such as pullulan and polyvinyl alcohol, Examples thereof include synthetic polymer compounds such as polyvinylpyrrolidone and acrylamide polymers. Further, superabsorbent polymers described in U.S. Pat. No. 4,960,681 and JP-A-62-245,260, that is, vinyl having --COOM or --SO ₃ M (M is a hydrogen atom or an alkali metal). Monomers of monomers or copolymers of these vinyl monomers or copolymers with other vinyl monomers (for example, sodium methacrylate, ammonium methacrylate, Sumika Gel L-5H manufactured by Sumitomo Chemical Co., Ltd.) are also used. These binders can be used in combination of two or more. A combination of gelatin and the above binder is particularly preferable. Also, gelatin is lime-processed gelatin according to various purposes,
It suffices to select from acid-treated gelatin and so-called demineralized gelatin with a reduced content of calcium and the like, and it is also preferable to use them in combination.

In the present invention, an organic silver salt oxidizing agent may be used together with the light-sensitive silver halide emulsion, and as an organic compound which can be used for forming the same, US Pat.
There are benzotriazoles, fatty acids and other compounds described in 500,626, columns 52 to 53. The acetylene silver described in U.S. Pat. No. 4,775,613 is also useful. Two or more kinds of organic silver salts may be used in combination. The above organic silver salt is 0.0 per mol of the photosensitive silver halide.
1 to 10 mol, preferably 0.01 to 1 mol can be used in combination. Total coating amount of light-sensitive silver halide emulsion and the organic silver salt is 0.05 to 10 g / m ² in terms of silver, and preferably from 0.1-4 g / m ^2.

As the reducing agent used in the present invention, those known in the field of photothermographic materials can be used. Further, a dye-donating compound having a reducing property is also included. That is, the case where the component D) also has the function of the component B) is also included in the present invention (in this case, other reducing agents can be used together). Further, a reducing agent precursor which itself has no reducing property and which exhibits reducing property by the action of a nucleophile or heat in the developing process can also be used.
Examples of the reducing agent used in the present invention include U.S. Pat. No. 4,500,626, columns 49 to 50, and 4,83.
9,272, 4,330,617, 4,59
0,152, 5,017,454, 5,13
9,919, JP-A-60-140,335 (1)
7) to (18), ibid. 57-40, 245, ibid. 56-13.
No. 8,736, No. 59-178, 458, No. 59-5.
No. 3,831, 59-182, 449, 59-1
82,450, 60-119,555, 60-
128,436, 60-128,439, 60
-198,540, 60-181,742, 6
1-259,253, 62-201,434, 62-244,044, 62-131,253,
62-131,256, 63-10,151,
64-13,546, pages (40) to (57), JP-A-1-
120,553, 2-32,338, 2-3
No. 5,451, No. 2-234, No. 158, No. 3-16
0,443, EP 220,746, 78-
There are reducing agents and reducing agent precursors described on page 96 and the like.
When a coupler is used as a dye-donating substance, it is preferable to use one of the above-mentioned reducing agents or precursors thereof that acts as a color developing agent, particularly paraphenylenediamines and paraaminophenols. Combinations of various reducing agents such as those disclosed in US Pat. No. 3,039,869 can also be used.

When a diffusion resistant reducing agent is used, an electron transfer agent and / or
Alternatively, electron transfer agent precursors can be used in combination. Particularly preferably, said US Pat. No. 5,139,
919, European Patent Publication No. 418,743, JP-A-1
Those described in Nos. -138,556 and 3-102,345 are used. Further, a method of stably introducing into a layer as described in JP-A-2-230,143 and JP-A-2-235,044 is preferably used. The electron transfer agent or its precursor can be selected from the above-mentioned reducing agent or its precursor. It is desirable that the mobility of the electron transfer agent or its precursor is higher than that of the diffusion-resistant reducing agent (electron donor). Particularly useful electron transfer agents are 1-phenyl-3-pyrazolidones, sulfonamide phenols, or aminophenols. Diffusion resistant reducing agent (electron donor) used in combination with electron transfer agent
As the reducing agent, any one that does not substantially move in the layer of the light-sensitive material among the reducing agents described above is preferable, and hydroquinones, sulfonamide phenols, sulfonamide naphthols, hydrazines, hydrazones, and Sho 53-110827, US Pat. No. 5,032,487
No. 5,026,634, No. 4,839,272, and compounds described as electron donors, and dye-donating compounds having diffusion resistance and reducing property described later. Further, an electron donor precursor as described in JP-A-3-160,443 is also preferably used. In the present invention, the total amount of reducing agents added is 0.0 with respect to 1 mol of silver.
It is 1 to 20 mol, particularly preferably 0.1 to 10 mol.

The base precursor used in the present invention is a salt of an organic acid and a base which are decarboxylated by heat, an intramolecular nucleophilic substitution reaction, a Rossen rearrangement or a Beckmann rearrangement to decompose and release amines. A compound such as a compound which causes a certain reaction by heating to release a base and a compound which generates a base by electrolysis or a complex formation reaction are preferably used. The former type of base precursor that generates a base by heating is British Patent No. 998,
No. 4,060,420, which is a salt of trichloroacetic acid described in US Pat.
Salt of α-sulfonylacetic acid described in Japanese Patent Application No. 58-55
Propiol acetic acid salt described in 700, 2-carboxycarboxamide derivative described in U.S. Pat. No. 4,088,496, and thermally decomposable acid using alkali metal or alkaline earth metal in addition to organic base as a base component. Salt with (Japanese Patent Application Sho 5
8-69597), Japanese Patent Application No. 58 utilizing the Rossen transition.
-43860, hydroxam carbamates,
Japanese Patent Application No. 58-31614 for producing nitrile by heating
And aldoxime carbamates described in No.
Others, British Patent Nos. 998,945 and 2,072
9,480, JP-A-50-226225, U.S. Pat. Nos. 3,220,846, 4,514,493,
No. 4,657,848 and known technology No. 5 (199
The base precursors described in pages 55-86, etc., issued by Aztec Co., Ltd., March 22, 1) are also useful.

In the present invention, the image-forming substance is a dye-donor compound. A dye-donor compound is a compound that produces or releases a dye in response to this reaction or vice versa when silver ions are reduced to silver under high temperature conditions. The above-mentioned reducing dye-donor compounds are also included. The dye may be transferred to form an image of only the dye, or the image may be formed in cooperation with developed silver produced during heat development. Examples of dye-donating compounds that can be used in the present invention include leuco dyes that form dyes by a reduction reaction. Specific examples of leuco dyes include U.S. Pat. Nos. 4,368,247 and 4,374,921.
Nos. 4,883,747 and 4,923,792. Specific examples of the dye-donating compound having a reducing property are also described in JP-B-6-10729. Preferred examples of the dye-donating compound that can be used in the present invention include compounds (couplers) that form a dye by an oxidative coupling reaction. The coupler may be a 4-equivalent coupler or a 2-equivalent coupler. A 2-equivalent coupler having a diffusion resistant group as a leaving group and forming a diffusible dye by an oxidative coupling reaction is also preferable. The diffusion resistant group may form a polymer chain. Specific examples of color developers and couplers
“The Theory of the Photographic Proce” by THJames
ss "4th edition pages 291-334 and 354-361,
RD-307, 105, page 871, JP-A-58-12.
3,533, 58-149,046, 58-1
49,047, 59-111,148, 59-.
124,399, 59-174,835, 59
-231, 539, 59-231, 540, 6
0-2,950, 60-2,951, 60-1
4,242, 60-23,474, 60-6.
No. 6,249, etc.

In particular, when the image forming method of the present invention is applied to a film for printing on a PS plate in the printing field,
There is a luminous line of a gallium lamp (metal halide lamp) widely used as an exposure light source 400 to 450
A system in which a leuco dye having an absorption in this region or a coupling dye (eg, a system using a yellow coupler) is used together with a silver image so as to show a high shielding effect for nm is preferable.

Hydrophobic additives such as dye-donor compounds and diffusion resistant reducing agents can be incorporated into the layer of the photothermographic material by known methods such as the method described in US Pat. No. 2,322,027. it can. In this case, US Pat.
55,470, 4,536,466, 4,53
No. 6,467, No. 4,587, 206, No. 4,55
No. 5,476, No. 4,599,296, Japanese Examined Patent Publication 3-6
A high-boiling point organic solvent such as that described in No. 2,256 can be used in combination with a low-boiling point organic solvent having a boiling point of 50 ° C. to 160 ° C., if necessary. In addition, two or more kinds of these dye donating compounds, diffusion resistant reducing agents, high boiling point organic solvents and the like can be used in combination. The amount of the high boiling point organic solvent is 10 g or less, preferably 5 g or less, and more preferably 1 g to 0.1 g, relative to 1 g of the dye-donor compound used. Also, 1 cc or less per 1 g of binder, further 0.5 cc
Below, 0.3 cc or less is particularly suitable. See also
-39,853 and JP-A-51-59,943, dispersion methods using polymers and JP-A-62-30,2.
The method of adding a fine particle dispersion described in No. 42 etc. can also be used. In the case of a compound which is substantially insoluble in water, fine particles can be dispersed and contained in a binder in addition to the above method. When dispersing the hydrophobic compound in the hydrophilic colloid, various surfactants can be used. For example, JP-A-59-157,636 (37)
The surfactants listed on page (38) above in Research Disclosure can be used. In the photothermographic material of the present invention, a compound capable of activating development and stabilizing an image at the same time can be used. Specific compounds preferably used are described in US Pat. No. 4,500,6.
No. 26, columns 51 to 52.

As the hardener used in the constituent layers of the photothermographic material, the above-mentioned Research Disclosure, US Pat. No. 4,678,739, column 41, 4,791,04,
No. 2, JP-A-59-116,655 and JP-A-62-24.
5,261, 61-18,942, JP-A 4-2.
Examples include hardeners described in No. 18,044. More specifically, aldehyde hardeners (formaldehyde etc.), aziridine hardeners, epoxy hardeners, vinyl sulfone hardeners (N, N'-ethylene-bis (vinylsulfonylacetamide)) Ethane, etc.), N-methylol type hardeners (dimethylol urea, etc.), or polymer hardeners (compounds described in JP-A-62-234157). These hardeners are used in an amount of 0.001 to 1 g, preferably 0.001 g per 1 g of gelatin applied.
5 to 0.5 g is used. The layer to be added may be any of the layers constituting the light-sensitive material or the dye-fixing material, or 2
You may divide and add in more than one layer.

Various antifoggants or photographic stabilizers and their precursors can be used in the constituent layers of the photothermographic material. Specific examples thereof include the above-mentioned Research Disclosure, US Pat. No. 5,089,
No. 378, No. 4,500,627, No. 4,614, 7
02, JP-A-64-13,546, pages (7) to (9), (5
7)-(71) and (81)-(97), U.S. Pat.
No. 5,610, No. 4,626,500, No. 4,98
3,494, JP-A-62-174,747, 62.
-239,148, 63-264,747, JP-A-1-150,135, 2-110,557, 2-178,650, RD17,643 (1978).
(Year) (24) to (25) and the like. These compounds are preferably used in an amount of 5 × 10 ⁻⁶ to 1 × 10 ⁻¹ mol, and more preferably 1 × 10 ⁻⁵ to 1 × 10 ⁻² mol, per mol of silver.

A known anti-fading agent may be used in the photothermographic material of the present invention. As an organic anti-fading agent,
Hydroquinones, 5-hydroxychromans, 5-hydroxycoumarans, spirochromans, p-alkoxyphenols, hindered phenols centering on bisphenols, gallic acid derivatives, methylenedioxybenzenes, aminophenols, Typical examples are hindered amines and ether or ester derivatives obtained by silylating or alkylating the phenolic hydroxyl groups of these compounds. Further, a metal complex represented by (bissalicylaldoximato) nickel complex and (bis-N, N-dialkyldithiocarbamato) nickel complex can also be used. US Pat. No. 4,268,593 for preventing deterioration of a yellow dye image by heat, humidity and light.
Compounds having both partial structures of hindered amine and hindered phenol in the same molecule, as described in No. 1, give good results. Further, in order to prevent the deterioration of the magenta dye image, especially the deterioration due to light, JP-A-56-1596 is used.
No. 44, and Japanese Patent Application Laid-Open No. 55-
The hydroquinone diether or monoether substituted chromans described in No. 89835 give favorable results.

The heat-developable photosensitive material comprises a coating aid,
Various surfactants can be used for the purposes of improving peelability, improving slipperiness, preventing electrification, and promoting development. Specific examples of the surfactant include Research Disclosure, JP-A Nos. 62-173,463 and 62-183,457.
No. etc. The constituent layers of the photothermographic material include
An organic fluoro compound may be included for the purpose of improving slipperiness, preventing static electricity, improving peelability and the like. Typical examples of the organic fluoro compound include JP-B-57-9053 Nos. 8 to 17
Column, JP-A-61-29443 and JP-A-62-135836.
And the like hydrophobic fluorocarbon compounds such as oily fluorocarbon compounds such as fluorocarbon oils or solid fluorocarbon compounds such as tetrafluoroethylene resin.

A matting agent can be used in the photothermographic material for the purpose of preventing adhesion, improving slipperiness, and providing a non-glossy surface. Matting agents such as silicon dioxide, polyolefins and polymethacrylates are disclosed in JP-A-61-882.
In addition to the compounds described on page 56 (29), benzoguanamine resin beads, polycarbonate resin beads, AS resin beads and the like are disclosed in JP-A-63-274944 and 63-274.
There are compounds described in No. 952. In addition, the compounds described in the above Research Disclosure can be used. These matting agents can be added not only to the uppermost layer (protective layer) but also to the lower layer as needed. In addition, the constituent layers of the photothermographic material may contain a thermal solvent, a defoaming agent, a fungicide-based agent, colloidal silica and the like. Specific examples of these additives are described in JP-A-61-88256 (26) to (32), JP-A-3.
-11,338, Japanese Patent Publication No. 2-51,496 and the like.

In the present invention, an image forming accelerator can be used in the photothermographic material. The image formation accelerator has functions such as promotion of oxidation-reduction reaction between a silver salt oxidizing agent and reducing agent, generation of dye from dye-donor substance, decomposition of dye or release of diffusible dye. According to their physicochemical functions, they are classified into nucleophilic compounds, high boiling point organic solvents (oils), thermal solvents, surfactants, compounds that interact with silver or silver ions, and the like. However, these substance groups generally have a composite function, and usually have some of the above-mentioned accelerating effects together. These details are described in US Pat. No. 4,678,739, columns 38 to 40.

The support used in the photographic material of the present invention is
Polyolefin such as polyethylene and polypropylene, polycarbonate, cellulose acetate, polyethylene terephthalate, polyethylene naphthalate, synthetic plastic film such as polyvinyl chloride, and paper support such as photographic base paper, printing paper, baryta paper, and resin coated paper. And a support provided with a reflective layer on the above synthetic plastic film, JP-A-62-25315
Those described as supports in No. 9 (pages 29 to 31). These supports include US Pat.
No. 41,735, it is possible to use a material which is hard to have a curl by applying a heat treatment of Tg or less. Further, the surface of these supports may be surface-treated for the purpose of improving the adhesion between the support and the emulsion undercoat layer. In the present invention, glow discharge treatment, ultraviolet irradiation treatment, corona treatment and flame treatment can be used as the surface treatment. Further, the support described in p44 to p149 of Known Technology No. 5 (published by Aztec Co., Ltd. on March 22, 1991) can also be used.

In the present invention, various development stoppers can be used in the photothermographic material for the purpose of always obtaining a constant image with respect to variations in processing temperature and processing time during development. The term "development terminating agent" as used herein refers to a compound that immediately neutralizes or reacts with a base to reduce the concentration of the base in the film to stop the development after proper development, or inhibits development by interacting with silver and a silver salt. Compound. Specific examples thereof include an acid precursor that releases an acid when heated, an electrophilic compound that causes a substitution reaction with a coexisting base when heated, or a nitrogen-containing heterocyclic compound, a mercapto compound and a precursor thereof. More specifically, JP-A-62-253,159 (31)
~ (32).

As a method of exposing and recording an image on the photothermographic material, for example, a method of directly photographing a landscape or a person by using a camera, or a method of exposing through a reversal film or a negative film by using a printer or an enlarger is used. Method, scanning exposure of the original image through a slit using a copier exposure device, scanning exposure by emitting light from a light emitting diode, various lasers (laser diode, gas laser, etc.) via image information and electrical signals Method (Japanese Patent Application Laid-Open No. 129,625, Japanese Patent Application No. 3-33)
8,182, 4-9,388, 4-281,4
No. 42), image information is output to an image display device such as a CRT, a liquid crystal display, an electroluminescence display, and a plasma display, and exposed directly or through an optical system.

As a light source for recording an image on a photothermographic material, as described above, natural light, a tungsten lamp, a light emitting diode, a laser light source, a CRT light source, etc., US Pat. Kaihei 2-53,
The light source and the exposure method described in Nos. 378 and 2-54,672 can be used. Image exposure can also be performed using a wavelength conversion element in which a non-linear optical material and a coherent light source such as laser light are combined. Here, the non-linear optical material is a material capable of exhibiting non-linearity between polarization and an electric field, which appears when a strong optical electric field such as laser light is applied, such as lithium niobate and potassium dihydrogen phosphate (KDP). ), Lithium iodate, inorganic compounds represented by BaB ₂ O _4, etc., urea derivatives, nitroaniline derivatives, for example, nitropyridine-N-such as 3-methyl-4-nitropyridine-N-oxide (POM). Oxide derivatives, JP-A-61-53462 and JP-A-62-210432
The compounds described in No. 10 are preferably used. As a form of the wavelength conversion element, a single crystal optical waveguide type, a fiber type and the like are known, and any of them is useful. Further, the above-mentioned image information is an image signal obtained from a video camera, an electronic still camera, or the like, Nippon Television Signal Standard (NTS).
A television signal represented by C), an image signal obtained by dividing an original image into a large number of pixels such as a scanner, or an image signal created by using a computer represented by CG or CAD can be used.

The photothermographic material of the present invention may have a form having a conductive heating element layer as a heating means for heat development. The heat generating element in this case is disclosed in JP-A-61-1.
Those described in No. 45,544 and the like can be used. The heating temperature in the heat development step is about 80 ° C to 180 ° C, preferably 80 ° C to 150 ° C, and more preferably 80 ° C.
~ 135 ° C. The heating time is 0.1 second to 60 seconds, preferably 0.1 to 30 seconds.

As a heating method in the developing step, a heated block or plate is brought into contact, or a hot plate, a hot presser, a heat roller, a heat drum, a halogen lamp heater, an infrared or far infrared lamp heater or the like is brought into contact. Alternatively, there is a method of passing through a high temperature atmosphere. The method of superimposing the heat-developable light-sensitive material and the dye-fixing material is disclosed in JP-A-62-253,159 and JP-A-61-14.
The method described on page 7, 244 (27) can be applied.

[0070]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these.

Example 1 A method for preparing a blue light-sensitive silver halide emulsion will be described.
Solution (2) of Table 1 was added to a well-stirred aqueous gelatin solution (31.6 g of gelatin, 2.5 g of potassium bromide, and 13 mg of compound (a) added to 584 ml of water and heated to 70 ° C). First, the addition was started, and 10 seconds later, the addition of the liquid (1) was started. After that, the liquids (1) and (2) were added over 30 minutes. (2) 5 minutes after the addition of the solution, Table 3
Solution (4) was added, and 10 seconds later, solution (3) was added. 27 minutes and 50 seconds for (3) liquid, 2 for (4) liquid
Add over 8 minutes. After washing with water and desalting by a conventional method (performed with a precipitating agent (c) at pH 3.9), 24.6 g of lime-treated ossein gelatin and 56 mg of compound (b) were added to adjust the pH to 6.1, The pAg was adjusted to 8.5, 0.55 mg of sodium thiosulfate was added, and optimal chemical sensitization was performed at 65 ° C. Next, 0.35 g of the sensitizing dye (f), 56 mg of the antifoggant (d) and 2.3 ml of the compound (e) as a preservative were added and then cooled. Thus, 582 g of a monodisperse octahedral silver bromide emulsion having an average grain size of 0.55 μm was obtained.

[0072]

[Table 1]

[0073]

[Chemical 18]

A method for preparing silver baisotriazole will be described. Benzotriazole 6.5g and gelatin 10g
Was dissolved in 1000 liters of water, kept at 50 ° C., and stirred.
Next, a solution prepared by dissolving 8.5 g of AgNO ₃ in 100 ml of water was added to 2 parts.
The above solution was added in minutes. The emulsion was allowed to settle by adjusting the pH of this emulsion to remove excess salt. Then, the pH was adjusted to 6.0 to obtain a benzotriazole silver emulsion with a yield of 400 g. A method for preparing a dispersion of the coupler and the reducing agent will be described. Tricresyl phosphate 10
A 10% by weight aqueous solution of gelatin containing 10 g of coupler (Y-1) and 5 g of 2,6-dichloro-p-aminophenol as a reducing agent dissolved in 30 ml of ethyl acetate and 1.0 g of sodium dodecylbenzenesulfonate. 110 g
A dispersion of the coupler and the reducing agent was prepared by emulsifying and dispersing therein at 50 ° C.

[0075]

[Chemical 19]

As a first layer containing a fixing agent, an aqueous gelatin solution containing 2% ammonium thiosulfate was coated on the support at a wet film thickness of the coating solution of 100 μm. A solution obtained by dissolving 10 g of polyvinyl acetate (manufactured by Aldrich) in 20 g of methylene chloride and 20 g of ethyl acetate was applied onto the first layer to form a wet film thickness of 50 μm.
An intermediate layer of layers was applied. Further, as the third layer, 20 g of a dispersion liquid of coupler and reducing agent, benzotriazole silver emulsion 1
0 g, blue photosensitive silver halide emulsion 6 g, water 10 g, and a coating solution containing 5 g of urea as a thermal solvent were wet coated, dried, and then coated with a gelatin protective film containing 1% by weight of guanidine trichloroacetic acid to provide a photothermographic material. Got The photothermographic material obtained as described above is imagewise exposed to 135 ° C.
It was heated for 5 seconds. The image density of the exposed area and the fog density of the unexposed area immediately after the treatment were measured using an X-LITE 310 densitometer (manufactured by X-LITE). The image and fog yellow densities are respectively 0.
It was 65 and 0.12. The processed light-sensitive material was irradiated with a desk fluorescent lamp (20 watts) at a distance of 15 cm for 24 hours, and the image density and fog density were 0.64 and 0.14. Met.

Comparative Example As a comparative sample, a photothermographic material having the same structure as that of Example 1 except that the ammonium thiosulfate in the first layer was removed was prepared. In the same manner as in Example 1, the image density and fog density of the light-sensitive material immediately after the processing and exposed to the fluorescent light were measured. Immediately after processing, the yellow density of image fog is 1.
20 and 0.35, and the image and fog yellow densities after exposure to fluorescent light were 1.5 and 1.45, respectively. From this result, it is clear that the photothermographic material of Example 1 of the present invention has less fogging and is excellent in light resistance of an image.

Example 2 A photothermographic material having the same constitution was prepared, except that the gelatin aqueous solution containing ammonium thiosulfate in the first layer of Example 1 was changed to the gelatin aqueous solution shown in Table 2.

The method for preparing the coating liquid for the first layer in Table 2 will be described. 50 mmol of additive was added to tricresyl phosphate 10
ml, 30 ml of ethyl acetate and 30 ml of cyclohexanone, and emulsified and dispersed at 50 ° C. in 50 g of a 10 wt% solution of gelatin containing 2.5 cc of 1 N sodium hydroxide solution and 0.5 g of sodium dodecylbenzenesulfonate. 100 g of the fixing agent dispersion was prepared. This dispersion 10
g and 10 g of urea to which 80 g of a 10% aqueous gelatin solution was added to apply a wet film thickness of the coating solution of 100 μm.

This photosensitive material was imagewise exposed and then developed by heating at 140 ° C. for 30 seconds. The results of measuring the image density and fog density of the light-sensitive material immediately after the processing and exposed to the fluorescent lamp light are the same as in Example 1.
Low fog and little increase in density in the fogged part. Table 2 shows the results.

[0081]

[Table 2]

Example 3 As a first layer containing a fixing agent, a gelatin aqueous solution having the same composition as in Table 2 of Example 2 was coated on the support at a wet film thickness of the coating solution of 100 μm. On the first layer, an aqueous solution of polyethylene vinyl acetate latex (Panflex OM-4000; manufactured by Kuraray Co., Ltd.) diluted to a solid content of 10% by weight so as to have a wet film thickness of 50 μm, an intermediate layer of the second layer. Was applied, dried and then heated to form a film at 75 ° C. for 5 hours. Furthermore the third
As a layer, a coating solution containing 20 g of the above-mentioned coupler-reducing agent dispersion, 10 g of benzotriazole silver emulsion, 6 g of blue-sensitive silver halide emulsion, 10 g of water, and 5 g of urea as a heat solvent was wet-coated, dried, and then guanidine. A gelatin protective film containing 2% by weight of phenylsulfonylacetic acid was applied to obtain a photothermographic material. After imagewise exposure of this light-sensitive material, 150
Development was carried out at 30 ° C. for 30 seconds. As a result of measuring the image density and the fog density of the light-sensitive material immediately after the processing and exposed to the fluorescent light, as in Example 2, the fog was low and the density increase in the fog portion was small. The results are shown in Table 3.

[0083]

[Table 3]

The solid dispersion method of the fixing agent will be described below. Fixing agent V-20, powder of 50 mmol, 15% gelatin aqueous solution 5
0g and 0.5g non-ionic surfactant, nC ₉ H ₁₉ -C ₆ H ₄ -O
-(-CH ₂ CH ₂ -O-) ₈ -H mixed with water 50cc, 200mesh
The mixture was stirred for 1 hour together with 100 g of the glass beads. The obtained dispersion was filtered and the pH was adjusted to 6.5 to 6.8 with a 1N sulfuric acid aqueous solution and a 1N sodium hydroxide aqueous solution.
The yield of dispersion is 65 g.

A dispersion obtained by adding 80 g of a 10% gelatin aqueous solution to 10 g of the above dispersion and 10 g of urea was applied at a wet film thickness of the coating solution of 100 μm. For the second and subsequent layers, a photothermographic material coated in the same manner as in Example 2 was prepared. This photosensitive material was imagewise exposed and then developed by heating at 140 ° C. for 30 seconds. The image density and fog density of the light-sensitive material immediately after processing and exposed to fluorescent light were measured. The image and fog yellow densities immediately after processing are 0.60 to 0.20, respectively, and the images and fog yellow densities after exposure to fluorescent light are 0.65 and 0.25, respectively.
As in the case of Example 1, the fog was low and the density increase in the fog portion was small.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 7, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction content]

[0035]

Embedded image

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0048

[Correction method] Change

[Correction content]

In order to give the light-sensitive silver halide used in the present invention green, red and infrared sensitivities, the light-sensitive silver halide emulsion is spectrally sensitized with a methine dye or the like. . Further, if necessary, the blue-sensitive emulsion may be spectrally sensitized in the blue region. The dyes used include cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes, hemicyanine dyes, styryl dyes and hemioxonol dyes. Specifically, US Pat.
617,257, JP-A-59-180,550, JP-A-64-13,546, JP-A-5-45,828 and JP-A-5-45,834. These sensitizing dyes may be used alone, or a combination thereof may be used, and the combination of sensitizing dyes is often used particularly for the purpose of supersensitization or wavelength adjustment of spectral sensitivity. Along with the sensitizing dye, a dye having no spectral sensitizing effect itself or a compound that does not substantially absorb visible light and exhibits supersensitization may be contained in the emulsion (for example, US Pat. 615, 641 and those described in JP-A-63-23, 145). These sensitizing dyes may be added to the emulsion at the time of chemical ripening or before or after the chemical ripening, or according to U.S. Pat. Nos. 4,183,756 and 4,225,666 before and after the nucleation of silver halide grains. Good. Further, these sensitizing dyes and supersensitizers may be added in a solution of an organic solvent such as methanol, a dispersion of gelatin or a solution of a surfactant. The addition amount is generally 10 ^-8 to 10 per mol of silver halide.
^-It is about ² mol.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0050

[Correction method] Change

[Correction content]

A hydrophilic binder is preferably used as the binder of the constituent layers of the photothermographic material. Examples thereof include Research Disclosure mentioned above and JP-A-64-
Examples thereof include those described on pages (71) to (75) of No. 13,546. Specifically, a transparent or translucent hydrophilic binder is preferable, and for example, gelatin, proteins such as gelatin derivatives or cellulose derivatives, natural compounds such as starch, gum arabic, dextran, and polysaccharides such as pullulan and polyvinyl alcohol, Examples thereof include synthetic polymer compounds such as polyvinylpyrrolidone and acrylamide polymers. Further, superabsorbent polymers described in U.S. Pat. No. 4,960,681 and JP-A-62-245,260, that is, vinyl having --COOM or --SO ₃ M (M is a hydrogen atom or an alkali metal). Monomers of monomers or copolymers of these vinyl monomers or copolymers with other vinyl monomers (for example, sodium methacrylate, ammonium methacrylate, Sumika Gel L-5H manufactured by Sumitomo Chemical Co., Ltd.) are also used. These binders can be used in combination of two or more. A combination of gelatin and the above binder is particularly preferable. Also, gelatin is lime-processed gelatin according to various purposes,
It suffices to select from acid-treated gelatin and so-called demineralized gelatin with a reduced content of calcium and the like, and it is also preferable to use them in combination.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0057

[Correction method] Change

[Correction content]

Hydrophobic additives such as dye-donor compounds and diffusion resistant reducing agents can be incorporated into the layer of the photothermographic material by known methods such as the method described in US Pat. No. 2,322,027. it can. In this case, US Pat.
55,470, 4,536,466, 4,53
No. 6,467, No. 4,587, 206, No. 4,55
No. 5,476, No. 4,599,296, Japanese Examined Patent Publication 3-6
A high-boiling point organic solvent such as that described in No. 2,256 can be used in combination with a low-boiling point organic solvent having a boiling point of 50 ° C. to 160 ° C., if necessary. In addition, two or more kinds of these dye donating compounds, diffusion resistant reducing agents, high boiling point organic solvents and the like can be used in combination. The amount of the high boiling point organic solvent is 10 g or less, preferably 5 g or less, and more preferably 1 g to 0.1 g, relative to 1 g of the dye-donor compound used. Also, 1 cc or less per 1 g of binder, further 0.5 cc
Below, 0.3 cc or less is particularly suitable. See also
-39,853 and JP-A-51-59,943, dispersion methods using polymers and JP-A-62-30,2.
The method of adding a fine particle dispersion described in No. 42 etc. can also be used. In the case of a compound which is substantially insoluble in water, fine particles can be dispersed and contained in a binder in addition to the above method. When dispersing the hydrophobic compound in the hydrophilic colloid, various surfactants can be used. For example, JP-A-59-157,636 (37)
The surfactants listed on page (38) above in Research Disclosure can be used. In the photothermographic material of the present invention, a compound capable of activating development and stabilizing an image at the same time can be used. Specific compounds preferably used are described in US Pat. No. 4,500,6.
No. 26, columns 51 to 52.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0061

[Correction method] Change

[Correction content]

The heat-developable photosensitive material comprises a coating aid,
Various surfactants can be used for the purposes of improving peelability, improving slipperiness, preventing electrification, and promoting development. Specific examples of the surfactant include Research Disclosure, JP-A Nos. 62-173,463 and 62-183,457.
No. etc. The constituent layers of the photothermographic material include
An organic fluoro compound may be included for the purpose of improving slipperiness, preventing static electricity, improving peelability and the like. Typical examples of the organic fluoro compound include JP-B-57-9053 Nos. 8 to 17
Column, JP-A-61-29443 and JP-A-62-135836.
And the like, or oily fluorine-based compounds such as fluorine oil or hydrophobic fluorine compounds such as solid fluorine compound resins such as tetrafluoroethylene resin.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0071

[Correction method] Change

[Correction content]

Example 1 A method for preparing a blue light-sensitive silver halide emulsion will be described.
Solution (2) of Table 1 was added to a well-stirred aqueous gelatin solution (31.6 g of gelatin, 2.5 g of potassium bromide, and 13 mg of compound (a) added to 584 ml of water and heated to 70 ° C). First, the addition was started, and 10 seconds later, the addition of the liquid (1) was started. After that, the liquids (1) and (2) were added over 30 minutes. (2) 5 minutes after the addition of the solution, Table 1
Solution (4) was added, and 10 seconds later, solution (3) was added. 27 minutes and 50 seconds for (3) liquid, 2 for (4) liquid
Add over 8 minutes. After washing with water and desalting by a conventional method (performed with a precipitating agent (c) at pH 3.9), 24.6 g of lime-treated ossein gelatin and 56 mg of compound (b) were added to adjust the pH to 6.1, The pAg was adjusted to 8.5, 0.55 mg of sodium thiosulfate was added, and optimal chemical sensitization was performed at 65 ° C. Next, 0.35 g of the sensitizing dye (f), 56 mg of the antifoggant (d) and 2.3 ml of the compound (e) as a preservative were added and then cooled. Thus, 582 g of a monodisperse octahedral silver bromide emulsion having an average grain size of 0.55 μm was obtained.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0079

[Correction method] Change

[Correction content]

The method for preparing the coating liquid for the first layer in Table 2 will be described. 50 mmol of additive was added to tricresyl phosphate 10
ml, 30 ml of ethyl acetate and 30 ml of cyclohexanone, and emulsified and dispersed at 50 ° C. in 50 g of a 10 wt% solution of gelatin containing 2.5 cc of 1N sodium hydroxide solution and 0.5 g of sodium dodecylbenzenesulfonate. 100 g of the agent dispersion was prepared. This dispersion 10
g and 10 g of urea to which 80 g of a 10% aqueous gelatin solution was added to apply a wet film thickness of the coating solution of 100 μm.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0081

[Correction method] Change

[Correction content]

[0081]

[Table 2]

[Procedure Amendment 9]

[Document name to be amended] Statement

[Name of item to be corrected] 0083

[Correction method] Change

[Correction content]

[0083]

[Table 3]

Claims (2)

[Claims] 1. At least the following components on the same support: A) a photosensitive silver halide B) a reducing agent C) a base precursor D) a dye-donor substance which releases or produces a dye by heat development, and E) A photothermographic material containing a compound capable of fixing and stabilizing silver halide. 2. The photosensitive material according to claim 1, which is used after imagewise exposure or simultaneously with imagewise exposure, at 80 to 180 ° C. for 0.1 second to
An image forming method comprising forming an image by thermal development for 60 seconds, and fixing the photosensitive silver halide in the undeveloped portion with the fixing agent of the component E) after or simultaneously with the image formation.