JPH01198744A - Silver halide photographic sensitive material containing novel hardening agent - Google Patents

Abstract

PURPOSE:To improve the finish quality and physical characteristics of a photograph by hardening the gelatin in a hydrophilic colloid layer with at least one kind selected from specific compds. and the derivatives thereof. CONSTITUTION:The N,N'-disuccinimide oxalate compds. and the derivatives thereof are used as the hardening agent for the gelatin in the hydrophilic colloid layer and these compds. can be preferably expressed by the formula I. The amt. of the hardening agent to be added varies with the kind of the hardening agents to be used and the kind of emulsions and about 0.2-2mmol. per 1g of the dry gelatin is effective. While the timing for the addition of said agent may be in any stage of preparing the coating liquid for forming the gelatin film, the hardening agent is preferably added in general to a silver halide emulsion after the 2nd maturation of the silver halide emulsion in the case of adding the same to the silver halide emulsion. The elution of the gelatin and silver halide into a processing soln. is thereby decreased and the contamination of the developing soln. and the surface of the film is decreased. The finish quality and physical properties of the photograph are thus improved.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a silver halide photographic light-sensitive material containing a novel hardening agent, and more particularly, to a silver halide photographic material containing a novel hardening agent, and more specifically, a silver halide photographic material containing a novel hardening agent. This invention relates to a silver halide photographic material with excellent photographic properties.

[Prior Art] In recent years, when developing silver halide photographic materials, automatic conveyance has become popular due to the widespread use of automatic developing devices.

A system that performs development processing in a short time using high-temperature rapid processing is widely used. The phenomenon of rapid processing, the high temperature of the fixing solution, and the shortening of the transport time deteriorate the film properties of hydrophilic colloid substances, especially gelatin and/or gelatin derivatives, which constitute silver halide photographic materials. As a result, silver halide, which is the material constituting the silver halide photographic light-sensitive material, storage stabilizers, contrast enhancers, and other auxiliary agents may also be eluted into the processing solution during pre-cooling. In addition, from the viewpoint of suitability for rapid processing, photosensitive materials for rapid processing often have a high silver chloride content in their silver halide composition, and preservatives ( For example, it is necessary to increase the concentration of sulfites), so silver halide is easily eluted into the developer, and deterioration of the physical properties of the hydrophilic colloid layer further accelerates this tendency, which is preferable. That's not the point.

When gelatin is eluted from the hydrophilic colloid layer of a photographic light-sensitive material or silver halide is eluted from its constituent layers, gelatin scum and silver sludge are likely to be generated, and as a result, the processed silver halide photographic light-sensitive material is This causes gelatin deposits and black stains due to silver to adhere to the film surface, impairing the finished quality of the photograph.

Therefore, in order to maintain the physical properties of the hydrophilic colloid layer, it is necessary to add and contain various additives including a gelatin hardener in the hydrophilic colloid layer.

Conventionally, the gelatin hardening agents that have been incorporated into the gelatin colloid layer of light-sensitive materials and used to harden the same include, for example, aldehyde compounds, polyfunctional epoxy compounds, active halides, ethyleneimine compounds,
Active vinyl compounds and the like have been proposed.

[Problems to be Solved by the Invention] However, even when these gelatin hardeners are used, sufficient effects cannot be obtained in terms of improving the elution of gelatin and silver halide and the occurrence of stains caused by these. Furthermore, many of these increase the viscosity of the photographic emulsion, making it difficult to coat the emulsion layer, or have a slow curing speed.
If a long period of time is required after coating the emulsion layer, or if attempts are made to accelerate hardening by heating, the degree of hardness may vary due to uneven temperature, and photographic properties may be impaired. It has its drawbacks.

Additionally, using large amounts of hardener to reach the required level of hardening in a short period of time after application may have a negative effect on photographic properties, or cause hardening to occur gradually later on, eventually resulting in over-hardening. This is undesirable because it causes the phenomenon of dura mater after tearing, which significantly impairs developability.

The present invention eliminates the various problems that occur when using conventional hardeners as described above, improves the finishing quality and physical properties of photographs, and furthermore achieves the desired saturated hardening level. By using the minimum amount of hardening agent necessary to reach the desired level and achieving a saturated hardening level in a short period of time, we have developed a hardening agent that has a stable hardening level with little post-hardening phenomenon and such a hardening agent. The present invention provides a silver halide photographic material containing such a hardening agent.

[Means for Solving the Problems] As a result of repeated studies to solve the above problems, the present inventors have developed a hydrophilic colloid layer comprising at least one photosensitive silver halide emulsion layer on a support. In the silver halide photographic light-sensitive material coated with N, the gelatin in the hydrophilic colloid layer is N.

It has been found that the above object can be achieved by a silver halide photographic material that is cured with at least one selected from N'-disuccinimidoxalate compounds and derivatives thereof.

The present invention will be explained in more detail below.

The present invention uses an N,N'-disuccinimidoxalate compound and its derivatives as a hardening agent for gelatin in a hydrophilic colloid layer of a silver halide photographic light-sensitive material (hereinafter simply referred to as photosensitive material). However, these compounds can preferably be represented by the following formula [I].

- Formula [I] (wherein R1, R2, R3 and R4 each represent a hydrogen atom, a halogen atom, a hydroxy group, an alkyl group, an alkoxy group, an acyl group, an aromatic group or a heterocyclic group,
These also include those having substituents. ) In the general formula [I], the halogen atom represented by each of R+, R2, R3 and R4 includes, for example, a chlorine atom, a bromine atom or an iodine atom. Also,
Examples of the alkyl group include methyl group, ethyl group, butyl group, and hydroxyalkyl group. Further, examples of the alkoxy group include a methoxy group and an ethoxy group, and examples of the acyl group include an acetyl group. Examples of the aromatic group include a phenyl group and a naphthyl group, and examples of the heterocyclic group include a pyridyl group, a thiophene group, and a furan group.

Typical specific examples of the compound represented by the above-mentioned formula [I] are given below.

The hardening agent for the above exemplified compound is Tetrahedron Letters (
Tetrahedron 1etters) 24 volumes,
It can be easily synthesized by referring to p. 4451, 1983.

The amount of addition G of the hardening agent according to the present invention varies depending on the type of hardening agent and the type of emulsion used, but it is effective at about 0.2 to 2 mmol per 1 g of dry gelatin.

It can be added at any stage of preparing a coating solution for forming a gelatin film, but when added to a silver halide emulsion, it is generally added after the second ripening of the silver halide emulsion. good.

When the above-mentioned hardener is added to the above-mentioned emulsion, water, methanol, ethanol, acetone, acetic acid ethyl ester, etc. are commonly used as a solvent, but the effect of the present invention is not achieved even when it is dispersed in the emulsion. It won't be damaged.

As the silver halide emulsion, for example, silver halide emulsions such as silver bromide, silver iodobromide, silver chlorobromide, and silver chloroiodobromide can be used. It may be sensitized with a sensitizer, a chemical sensitizer such as a sulfur sensitizer or a reduction sensitizer, a sensitizing dye, a polyalkylene oxide compound, and various other commonly used photographic additives. can be added.

The silver halide contained in the silver halide emulsion layer according to the present invention has an average grain size of, but not limited to, 0.05 to 1.5 microns, preferably 0.1 to 0.5 microns.
microns, and at least 75%, preferably 80% or more of the total number of particles are 0.5 to 1.5 of the average particle size.
It is desirable to include silver halide having a grain size of 0.6 times to 1.4 times.

According to a most preferred embodiment of the present invention, the silver halide used in the present invention has an average grain size of 0.10 to 0.8μ, and 80% or more of all grains have an average grain size of 0.1μ to 0.8μ. It is silver chloroiodobromide or silver chlorobromide having a grain size of 6 to 1.4 times.

In addition, the above silver halide contains iridium, rhodium, osmium, bismuth, cobalt, nickel, etc. in the crystal grains.
Metal atoms such as palladium, ruthenium, iron, copper, zinc, lead, and cadmium may be contained. When these metal atoms are contained, 10-
It is preferably contained in an amount of 8 to 10-2 moles, particularly 1
It is suitable to contain 0-6 to 10-mol. Furthermore, it may be a surface latent image type or an internal latent image type. Silver halides prepared by a variety of different methods may be mixed.

The crystal shape may be cubic, octahedral, or spherical without any limitations.

The hydrophilic colloid particularly advantageously used in the present invention is gelatin, but other hydrophilic colloids such as colloidal albumin, agar, acacia, alginic acid, hydrolyzed cellulose acetate, acrylamide, imidized polyamide, polyvinyl alcohol , hydrolyzed polyvinyl acetate, gelatin derivatives, such as U.S. Pat. No. 2,614,928;
．． Phenylcarbamyl gelatin, acylated gelatin, phthalated gelatin as described in U.S. Pat. No. 753, U.S. Pat. Examples include those in which polymerizable monomers having an ethylene group such as styrene acrylate, acrylic ester, methacrylic acid, and methacrylic ester are grafted onto gelatin, and these hydrophilic Colloids can also be applied to layers that do not contain silver halide, such as antihalation layers, protective layers, interlayers, etc.

The silver halide photographic light-sensitive material of the present invention is formed by coating a hydrophilic colloid layer containing the silver halide emulsion layer described above on a suitable photographic support. Baryta paper, polyethylene coated paper, polypropylene synthetic paper, glass plates, cellulose acetate, cellulose nitrate, polyester films such as polyethylene terephthalate, polyamide films,
polypropylene film, polycarbonate film,
Typical examples include polystyrene films, and these supports are appropriately selected depending on the intended use of the silver halide photographic material.

The silver halide photographic material of the present invention is formed by coating on a support at least one hydrophilic colloid layer containing the silver halide of the present invention. The photosensitive material has a protective layer having an appropriate thickness, preferably 0.1 to 10 μm, particularly preferably 0.1 μm to 10 μm.
It is desirable to apply a protective gelatin layer of 7 to 2 microns.

The hydrophilic colloid used in the present invention may contain various photographic additives, such as gelatin plasticizers, hardeners,
Surfactant, image stabilizer, ultraviolet absorber, antistain agent, pH adjuster, antioxidant, antistatic agent, thickener,
Graininess improvers, dyes, mordants, brighteners, development speed regulators, matting agents, etc. can be used within the range that does not impair the effects of the present invention.

Among the above-mentioned various additives, those which can be particularly preferably used in the present invention include, for example, thickeners or plasticizers described in US Pat.
Publication No. 39, West German Application Publication No. 1.904.604, Japanese Patent Publication No. 48-63715, Japanese Patent Publication No. 45-154
No. 62, Belgian Patent No. 762.833, U.S. Patent No. 3,767,410, Belgian Patent No. 558
, No. 143, such as styrene-sodium maleate copolymer, dextran sulfate, etc. Hardening agents that can be used in combination with the hardening agent of the present invention include aldehyde-based, epoxy-based, Various hardeners and ultraviolet absorbers such as ethyleneimine type, active halogen type, vinyl sulfone type, isocyane 1-type, sulfonic acid ester type, carbodiimide type, mucochloric acid type, acyloyl type, etc., and ultraviolet absorbers include, for example, U.S. Patent No. 3, 253,921, British Patent No. 1.309.349, etc., especially 2-(2'-hydroxy-5-te
rtbutylphenyl)benzotriazole, 2-(2
'-Hydroxy-3',5'-di-tertbutylphenyl)benzotriazole,2-(2'-human0x-3'-tertbutyl-5'-butylphenyl)-5-chlorobenzotriazole, 2-( 2'
-hydroxy-3',5'-di-tertbutylphenyl)-5-chlorobenzotriazole, etc.;
No. 08, German Patent No. 107.990, US Patent No. 3.0
Compounds described in various publications such as No. 48,487 and US Pat. No. 515,998 can be used, and these compounds may be contained in the emulsion layer, intermediate layer, etc. Further, coating aids, emulsifiers, permeability improvers for processing solutions, foaming agents, and surfactants used to control various physical properties of photosensitive materials include British Patent No. 548.532; 1.21
6.389, U.S. Patent No. 3,026,202, U.S. Patent No. 3,514.293, and Japanese Patent Publication No. 44-265.
No. 130, No. 43-17922, No. 43-17926
No. 43-13166, No. 48-20785, French Painting Patent No. 202,588, Belgian Patent No. 773,451, Special Patent No. 48-1011
Anionic, cationic, nonionic, or amphoteric compounds described in Publication No. 18 and the like can be used. In addition, as an antistatic agent, Japanese Patent Publication No. 46-2415
No. 9, JP-A-48-89979, each town 111g of U.S. Patent No. 2,882.157, U.S. Patent No. 2,972,535, JP-A-48-20785, U.S. Pat. No. 48-43.
No. 130, No. 48-90391, Special Publication No. 46-241
59, No. 46-39312, No. 48-43809, and Japanese Patent Application Laid-open No. 47-33627, and matting agents include, for example, British Patent No. 1,221,980. , U.S. Patent No. 2,992,10
No. 1, No. 2.956.884, French Painting Patent No. 1,39
Compounds described in Japanese Patent Publication No. 5,544, Japanese Patent Publication No. 43-43125, etc., especially silica gel with a particle size of 0.5 to 20μ, polymethyl with a particle size of 0□5 to 20μ Examples include methacrylate polymers.

After exposure, the silver halide photographic light-sensitive material of the present invention is subjected to a development process. Examples of the developer that can be included in the developer used in this process include the following.

For example, typical dihydroxy type developers include catechol, pyrogallol and its derivatives, and ascorbic acid, hydroquinone, chlorohydroquinone, bromohydroquinone, isopropylhydroquinone, toluhydroquinone, methylhydroquinone,
2.3-dichlorohydroquinone, 2.5-dimethylhydroquinone, 2.3. -dibromohydroquinone, 2
゜5-dihydroxyacetophenone, 2,5-diethylhydroquinone, 2,5-di-p-phenethylhydroquinone, 2,5-dibenzoylaminohydroquinone, catechol, 4-chlorocatechol, 3-phenylcatechol, 4- phenyl-catechol, 3-methoxy-
Catechol, 4-7 cetyl-birogallol, 4(2'-
Typical examples of aminohydroxy type developers include ortho- and rose-aminophenol or aminopyrazolone, 4-aminophenol,
-amino-6-phenylphenol, 2-amino-4-
Chloro-6-phenylphenol, 4-amino-2-phenylphenol, 3.4-diaminophenol, 3-
Methyl-4゜5-diaminophenol, 2,4-cyamylsorcinol, 2.4.6-triaminophenol,
Examples include N-methyl-p-aminophenol, N-β-hydroxyethyl-p-aminophenol, p-hydroxyphenylaminoacetic acid, and 2-aminonaphthol. Furthermore, examples of diamine type developers include, for example, 4-amino-2-methyl-N, N-diethylaniline, 2,4-diamino-N, N-diethylaniline, N-
(4-Amiso-3-methylphenyl)-morpholine, p
-phenylenediamine, 4-amino-N,N-dimethyl-3-hydroxyaniline, N,N,N'.

N'-tetramethylparaphenylenediamine, 4-amino-N-ethyl-N-(β-humanoxyethyl)-aniline, 4-amino-3-methyl-N-ethyl-N-(β
- and droxyethyl)-aniline, 4-amino-N-ethyl-(β-methoxyethyl)-3-methyl-aniline, 4-amino-3-methyl-N-ethyl-N-(β-methylsulfonamidoethyl) -aniline, 4-amino-
N-butyl-N-γ-sulfobutylaniline, 1-(4
-aminophenyl)-pyrrolidine, 6-amino-1-ethyl, 1,2.3.4-tetrahydroquinoline, 9-
There are aminoyl loridine, etc.

As the rough hetero mouth type developer, for example, 1-phenyl-3-pyrazolidone (phenidone), 1-phenyl-4
-amino-5-pyrazolone, 1-(p-aminophenyl)-3-amino-2-pyrazoline, 1-phenyl-3-
Methyl-4-amino-5-pyrazolone, 4,4'-dimethyl-1-phenyl-pyrazolidone (dimedone), 5-
Aminouracil, 5-amino-2,4,6-dolihydroxyphyrimidene, and the like can be mentioned.

Other books include The Theory of the Photographic Process, 4th edition, by T. H. James.
theory or the P photograp
H1cProcess, Fourth Editio
n) Paragraphs 291-334 and Journal of the American Chemical Society
of the American Chemical
5ociety) Volume 73, Section 3100 (1951)
Developers such as those described in the following can be effectively used in the present invention.

These developers may be used alone or in combination of two or more types, but it is preferable to use two or more types in combination.

Examples of preferred combinations include combinations of hydroquinone and phenidone or hydroquinone and dimedone.
J#! , phenidone or dimedone is o, osg~
It is in the range of 5 g/2.

Further, even if a preservative such as a sulfite salt such as sodium sulfite, potassium sulfite, or ammonium sulfite is used in the developer used in the present invention, the effects of the present invention are not impaired, and one of the effects of the present invention is This can be mentioned as a characteristic. Sulfite i used! An appropriate ift degree is 0.06 to 1 gram ion/l. Additionally, droxyamine and hydrazide compounds may be used as preservatives.

In addition, 1) H adjustment and buffer function using caustic alkali, alkali carbonate, or amines used in general black and white developers, inorganic development inhibitors such as brompotali, and metal ion scavengers such as ethylenediaminetetraacetic acid. , development accelerators such as methanol, ethanol, benzyl alcohol, and polyalkylene oxide, surfactants such as sodium alkylarylsulfonate, natural saponins, sugars or alkyl esters of the above compounds, and hardeners such as glutaraldehyde, formalin, and glyoxal. It is optional to add a membrane agent, an ionic strength regulator such as sodium fA acid, and the like.

Although the pH can be arbitrarily set between 9 and 12, it is preferably within the range of 10 to 11 in terms of the effect of the preservative and photographic performance.

Further, examples of organic solvents that can be contained in the developer of the present invention include alkanolamines, glycols, and the like.

Examples of alkanolamines useful in the present invention include monoethanolamine, jetanolamine, and triethanolamine, with ethanolamine being preferred. The amount of m used is 20 to 500 g, preferably 60 to 300 g per 12 of the developer. Further, glycols useful in the present invention include, for example, ethylene glycol, diethylene glycol, propylene glycol, triethylene glycol, 1,4-butanediol, 1,5-bentanediol, and the like, with diethylene glycol being particularly preferred. The amount used is 20 to 500 g, preferably 60 to 300 g per developer.

The above alkanolamines and glycols may be used alone or in combination of two or more.

Development inhibitors useful in the present invention include 5-nitroindazole, 6-21-0 indazole, 5-methylbenzotriazole, 6-methylbenzotriazole,
The amount of 5-nitrobenzimidazole, 5-nitrobenzimidazole, 1-phenyl-5-mercaptotetrazole, etc. to be used is 10-1 to 10-5 mol, preferably 10-2 to 10-4, per 12 of the developer. It is a mole.

Further, it is preferable that the development inhibitor is dissolved in alkanolamine and glycol and added to the developer.

The photographic material of the present invention can be processed under various conditions. Regarding the processing temperature, for example, the development temperature is preferably 50°C or less, particularly preferably around 30°C, and the development time is generally completed within 3 minutes, but particularly preferably within 2 minutes for good results. often brings. Furthermore, it is optional to adopt processing steps other than development, such as washing, stopping, stabilizing, fixing, and if necessary, pre-hardening, neutralizing, etc., and these can be omitted as appropriate. In addition, these processes include so-called manual image processing such as plate development and frame development, as well as roller development, hanger development, etc.81
It may also be reduced development.

The silver halide photographic materials of the present invention include general black and white photographic materials, various X-ray photographic materials, photographic materials for printing (including those for printing plates), and various color photographic materials.

[Example] EXAMPLES The present invention will be explained in more detail with reference to Examples below.

Example 1 A silver chlorobromide gelatin emulsion having a composition of 5 mol % silver bromide and 95 mol % silver chloride and an average grain size of 0.20 μm was prepared by a neutral single jet method.

After physical ripening, desalination was performed by washing with water, gelatin was added, and then sodium thiosulfate and chloroauric acid were added to perform chemical sensitization, and then contrast 1 to 2.3.5-
Triphenyl-2-day-tetrazolium chloride O'. 3
g1 mol A (+, stabilizer 4-methyl-6-hydroxy-1.3.38, 7-titrazaindene 1 [11
The emulsion was finished by adding mole Ag and a surfactant, sodium dodecylbenzenesulfonate. The resulting gelatin silver halide emulsion was divided into 5 parts. As shown in Table 1 below, 0.2 mmol of an aqueous solution of the above-mentioned exemplified compound of the hardening agent per 1 g of gelatin was added to each divided portion to prepare an emulsion coating solution.

3. The five types of emulsion coating solutions obtained above were applied as silver onto a photo paper base coated with polyethylene layers on both sides. 0
IJ/ *', gelatin 3 (1/l') was applied and dried. The obtained sample was heated at 40°C for 4 days. Developed at 40°C for 15 seconds using
After fixing for 0 seconds and processing at 3 f/12, it was left to stand for 2 days, and the elution limit in the developer and the amount of gelatin eluted were measured. The results are shown in Table 1 below.

(Developer composition) Water
750112 Potassium sulfite
50g potassium carbonate 35
(] Hydroquinone 20 (
J Phenidone 0.25 (IN
-Methyl-p-aminophenol 0. 101J1-
Phenyl-5-mercaptotetrazole 30111Q5
-Methylbenzotriazole 60mg 5-nitroindazole 1001Q2-Mercapto-5-sulfonic acid benzimidazole 2-methylbenzotriazole 100mg Potassium bromide 6g Add water to 100 (h+
Let it be i2.

Fixer composition) (Composition A) Ammonium thiosulfate <72.5% w/v aqueous solution) 240
m>Af! sodium acid 17 (
] Sodium acetate trihydrate 6.5g Boric acid 6g Sodium citrate dihydrate 2g Acetic acid (90% w/w water f
f1l) 13. hi2 (composition) Pure water (ion exchange water) 17.125
4M<50% w/w water 1) li) 4.
7 gv Avi aluminum (Af1203 equivalent, aqueous solution with a gold ratio of 8.1% w/w) When using a 26.50 fixer, the above compositions were dissolved in 500 g of water in the order of the A1 composition, and used after finishing. The EIH of this fixer was about 4.3.

(Table-1) Ning 1 Comparative Compound (A) As is clear from the results of formula 1 above, the hardener according to the present invention has better results with respect to eluted gelatin and eluted silver than conventional ones. It was found that it has.

Furthermore, the degree of hardness obtained was sufficient for practical use, and there was almost no post-hardening.

Example 2 A silver chlorobromide gelatin emulsion having a composition of 90 mol % silver bromide and 10 mol % silver chloride and an average grain size of 0.20 μm was prepared by a neutral single jet method.

After physical ripening, desalination was performed by washing with water, gelatin was added, and then 1-lium thiosulfate was added to perform chemical sensitization, and then 5-methylbenzotriazole 2011111
1 mol A (1, polyethylene glycol 191 mol Ag
, stabilizer, the compound of the following structural formula (a) is I Q1 mol Ag, the compound of the following structural formula (b) is 2 Q1 mol A
g. The emulsion was finished by adding a surfactant.

Structural formula (a) Structural formula (b) The resulting gelatin silver halide emulsion was divided into 5 parts.

As shown in Table 2 below, an aqueous solution of the above-mentioned hardening agent compound was added to each divided portion at a rate of 0.2 to 1 g of gelatin.
Millimol was added to form an emulsion coating solution.

The five types of emulsion coating solutions obtained above were applied to a photographic paper base coated with a polyethylene layer on both sides at a rate of 3.00/ml as silver.
1" and gelatin at 3 g/f and dried. The obtained sample was heated at 40°C for 4 days. The sample thus prepared was heated at 40°C using a developer having the following composition.
, develop for 20 seconds, 1j! After processing for 3f per coat, it was left to stand for 2 days, and the amounts of eluted silver and eluted gelatin in the developer were measured. The results are shown in Figure 2 below.

(Developer composition) Water
750 vQ potassium sulfite
50g potassium bromide 3
g Potassium carbonate 350 Sodium phosphate 20 Q Hydroquinone 20 (1 Polyethylene glycol (molecule [154G> 1 (J Phenidone
0.25 (IN-methyl-p
-Aminophenol 1-phenyl-5-mercaptotetrazole 30mg5-methylbenzotriazole 20w+g5-nitroindazole 100++g1-methyl-
Benzimidazole 2-mercapto-5-sulfonate 20mg diethylene glycol 100m.

Butylaminojetanolamine 15 Q Add water to make 10001j2.

11HGt 11.5ni vAIu L/.

(Table 2) $2 Comparative Compound (B) As is clear from the results of coating 2 above, the hardener according to the present invention has better results with respect to eluted gelatin and eluted silver than conventional ones. It was found that it has.

Furthermore, the degree of hardness obtained was sufficient for practical use, and there was almost no post-hardening.

[Effects of the Invention] By using the hardening agent according to the present invention, a silver halide photographic material with less elution of gelatin and silver halide into processed saliva and less staining on the developer and film surface is provided. did it.

Moreover, as a result of the above, a silver halide photographic material with improved photographic finishing quality and physical properties was obtained.

Furthermore, by using a small amount of hardening agent to reach the desired saturated hardening level in a short period of time, we have developed a hardening agent and silver halide photographic sensitizer that provides a stable hardening level with less post-hardening development. were able to provide the materials.

Claims (1)

[Claims] In a silver halide photographic material in which a hydrophilic colloid layer including at least one photosensitive silver halide emulsion layer is coated on a support, gelatin in the hydrophilic colloid layer is N,N'-disuccine. 1. A silver halide photographic material, characterized in that it is cured with at least one selected from imidoxalate compounds and derivatives thereof.