JPS63274950A - Method for processing silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To improve the film properties of a processed film by immersing a silver halide photographic sensitive material into an electrolyte soln. of specific pH after exposing, developing and fixing. CONSTITUTION:The photographic sensitive material provided with a photosensitive silver halide emulsion layer on a base is subjected to exposing as well as a developing and fixing process, following which said material is immersed in the aq. electrolyte soln. of <=5.0 or >=8.0pH. The compsn. for such electrolyte soln. includes all compds. which are electrolytically dissociated in ordinary aq. solns. and exhibits <=5.0pH and the compd. exhibiting >=8.0pH includes all compds. which are electrolytically dissociated in ordinary aq. solns. and exhibit >=8.0pH. the great enhancement of the strength of the processed film by the simple method is enabled by immersing the processed film into the electrolyte soln. of <=5.0pH or >=8.0pH in such a manner.

Description

[Detailed Description of the Invention] [Field of Application in Industry A] The present invention relates to a method for processing a silver halide photographic light-sensitive material, and more specifically, a method for processing a silver halide photographic light-sensitive material that provides good film properties. It is related to.

[Background of the Invention] A silver halide photographic material is a material in which silver halide is dispersed in a binder mainly composed of gelatin and coated on a support. After exposure, this material is subjected to development, fixing, etc. However, the physical properties of the film after the development and fixing processes are not sufficient as they are, and therefore various methods have been widely used to improve the physical properties of the film.

For example, a method of adding a hardener to a silver halide emulsion,
Methods of adding a hardening agent to a developer, a method of adding a hardening agent to a fixer, and the like are well known in the photographic industry.

On the other hand, it is well known that foreign substances are attached to the gelatin film after development, or polymer substances are applied by overcoating or dipping, but these methods do not necessarily provide sufficient film strength. This method was not completely satisfactory, as it was not possible to do so or the process was complicated.

Therefore, the present inventors have conducted various studies on methods for improving the film strength of the gelatin film, and as a result, have invented a method for obtaining sufficient film strength using a simple method. [Object of the Invention] An object of the present invention is to provide a method for processing a silver halide photographic material, which can improve film properties after development and fixing processing in a simple manner.

[Structure of the Invention] Therefore, the object of the present invention is to expose a photographic light-sensitive material having at least one light-sensitive silver halide emulsion layer on a support, develop and fix the material, and then reduce the pH to below 5.0 or poa. This was achieved by a method for processing a silver halide photographic material, which is characterized by immersion in an electrolyte solution of 0 or more.

In the present invention, the electrolyte solution in which the developed and fixed silver halide photographic light-sensitive material (hereinafter referred to as a "processed film") is immersed may be a compound having a pH of 5.0 or lower or a compound having a pH of 18.0 or higher. First, compounds that exhibit a pH of 5.0 or lower include all compounds that normally ionize in an aqueous solution and give a pH of 5.0 or lower.Specific compounds include hydrochloric acid, sulfuric acid, nitric acid, acetic acid, and propionic acid. , citric acid, tartaric acid, chloroacetic acid, sulfonic acid, hypochlorous acid, perchloric acid, sulfurous acid, phosphoric acid, boric acid, benzoic acid, ammonium sulfate, ammonium chloride, carbonic acid, ammonium nitrate, etc., but are limited to these. It is not something that will be done.

Compounds that exhibit a pH of 8.0 or higher include all compounds that normally give a pH of 0 or higher when ionized in an aqueous solution.Specific compounds include sodium hydroxide, potassium hydroxide, lithium hydroxide, and hydroxide. Examples include, but are not limited to, magnesium, calcium hydroxide, sodium carbonate, potassium carbonate, calcium carbonate, magnesium carbonate, sodium sulfite, potassium sulfite, sodium acetate, potassium acetate, and sodium citrate.

The reason for limiting the pH to 5.0 or less or 8.0 or more is
A range in which the pH exceeds 5.0 and does not exceed 8.0, i.e.
This is because in the neutral region, the treatment effect is either absent or extremely weak.

Any of silver bromide, silver iodobromide, silver iodochloride, silver chlorobromide, and silver chloride may be used as the silver halide in the photographic emulsion layer of the silver halide photographic light-sensitive material used in the present invention. Silver halide is silver iodobromide containing up to 15 mole percent silver iodide. Particularly preferred is silver iodobromide containing from 1.3 mol % to 12 mol % silver iodide. Further, it is preferable that silver iodide is formed inside the grains.

The average grain size of the silver halide grains in the photographic emulsion (expressed as the grain diameter for spherical or approximately spherical grains, and the ridged grain size for cubic grains, expressed as an average calculated by the projected area) is , about 0.0 μm to 5 μl, preferably about 0.2-2 μm gives good results.

Further, the grain size distribution of the silver halide grains in the photographic emulsion used in the present invention may be narrow or wide, or may be monodispersed. Here, monodisperse means that 95% of the grains are Within ±60% of the average particle size, preferably 40%
It is a dispersion system with a size within %. Here, the number average grain size is the number average diameter of the projected area diameter of silver halide grains.

The silver halide grains in the photographic emulsion used in the present invention are
Regular (
It may have a regular crystal shape, or it may have an irregular crystal shape such as a spherical shape or a plate shape.
), or a composite of these crystal forms, or a mixture of particles of various crystal forms.

In addition, for example, a junction type silver halide crystal in which an oxide crystal such as PbQ and a silver halide crystal such as silver chloride are combined, and an epitaxially grown silver halide crystal (
For example, silver chloride, silver iodobromide, silver iodide, etc. are grown epitaxially on silver bromide. ), a hexagonal crystal, a crystal in which a regular hexahedral silver chloride is aligned over a regular octahedral silver iodide, and the like.

Furthermore, an emulsion may be used in which ultratabular silver halide grains having a diameter of five times or more the grain thickness occupy 50% or more of the total projected area.

Even if the crystal structure of silver halide grains is uniform inside, there are also those with a layered structure where the inside and outside are different, British Patent No. 635841, US Patent No. 362231
So-called conversion type particles as described in No. 8 or core-shell particles grown using seed crystals may be used.

Furthermore, it may be of a type in which a latent image is mainly formed on the surface, that is, a surface latent image type silver halide grain, and/or a so-called internal latent image type silver halide grain in which a latent image is formed inside the grain.

The method for preparing the photographic emulsion used in the present invention may be any of the acid method, neutral method, ammonia method, etc., and the methods for reacting the soluble silver salt and soluble halogen salt include one-sided mixing method, simultaneous mixing method, double mixing method, etc. Jet method, Chondral double jet method, conversion method, core/shell method,
Any combination thereof may be used. It is also possible to use a method in which particles are formed in an excess of silver ions (so-called back-mixing method).

The Chondral double jet method is a type of simultaneous mixing method in which PA in the liquid phase in which silver halide is produced is
According to this method, a silver halide emulsion having a regular crystal shape and a nearly uniform grain size can be obtained.

When forming silver halide grains, silver halide solvents such as ammonia, rhodanpotash, rhodanammonium, thioether compounds, etc. are used to control grain growth.
Thione compounds, amine compounds, etc. can be used.

Among them, ammonia is preferable, and two
More than one type of silver halide emulsion may be mixed.

In the present invention, cadmium salt, zinc salt, lead salt, thallium salt,
An iridium salt or a complex salt thereof, a rhodium salt or a complex salt thereof, an iron salt or an iron complex salt, or the like may be coexisting. Further, the amount of these additives may be small or large depending on the intended photosensitive material.

In order to remove soluble salts from the emulsion after precipitation or physical ripening, the Tardel water washing method, which involves gelatinization of gelatin, may be used. A precipitation method (flocculation method) using gelatin derivatives (eg, acylated gelatin, carbamoylated gelatin, etc.) may also be used. The process of removing soluble salts may be omitted.

Silver halide photographic emulsions may or may not be chemically sensitized. Chemical sensitization methods include sulfur sensitization using compounds containing sulfur that react with active gelatin or silver (e.g., thiosulfates, thioureas, mercapto compounds, rhodanines); reducing substances (e.g., Reduction sensitization using stannous salts, amines, hydrazine derivatives, formamidine sulfinic acid, silane compounds): Noble metal compounds (e.g. gold complex salts, phosphorus, metals from group Ⅰ of the periodic table such as IrPd) A noble metal sensitization method using complex salts of 1, 2 and 3 can be used alone or in combination.

The silver halide photographic emulsion of the light-sensitive material of the present invention may be spectrally sensitized to relatively long wavelength blue light, green light, red light or infrared light using a sensitizing dye.

Sensitizing dyes include cyanine dyes, merocyanine dyes,
Complex cyanine dye, complex merocyanine dye, holopolar cyanine dye, styryl dye,
Hemicyanine dyes, oxonol dyes, hemioxonol dyes, etc. can be used.

Sensitizing dyes may be used alone or in combination, and combinations of sensitizing dyes are often used particularly for the purpose of supersensitization.

The sensitizing dye used in the present invention is advantageously used at a dye concentration that does not substantially reduce the inherent sensitivity of the silver halide emulsion.

The sensitizing dye used in the present invention has a molecular weight of 1X10"' mole to 5X10-' mole per mole of silver halide, preferably 1 x 1 (1-' mo JL/ to 2.5 x 10-' mole).
3-1-JL/, particularly preferably 4X10-' mol ~
It is contained in the silver halide photographic emulsion in a proportion of 1X10-3 moles.

The sensitizing dye used in the present invention can be directly dispersed into the emulsion. These can also be prepared using a suitable solvent, such as methyl alcohol, ethyl alcohol, lobanol,
Methyl cellosolve, acetone, fluorinated alcohol, water,
It can also be dissolved in pyridine or a mixed solvent thereof and added to the emulsion in the form of a solution. Ultrasonic waves can also be used for dissolution.

In addition, methods for adding this sensitizing dye include dissolving the dye in a volatile organic solvent, dispersing the solution in a hydrophilic colloid, and adding this dispersion into the emulsion, and dissolving the water-insoluble dye. A method in which the dye is dispersed in a water-insoluble solvent without oxidation, and this dispersion is added to an emulsion; A method in which the dye is dissolved in a surfactant and the solution is added to the emulsion; A method in which the dye is dissolved using a compound that causes red shift. , a method of adding the solution into an emulsion; a method of dissolving a dye in an acid substantially free of water and adding the solution into an emulsion.

The sensitizing dyes may be uniformly dispersed in the silver halide emulsion before being coated on a suitable support, but can of course also be dispersed during any step in the preparation of the silver halide emulsion.

Along with the sensitizing dye, it is a dye that itself does not have a spectral sensitizing effect or a substance that does not substantially absorb visible light,
A substance exhibiting supersensitization may also be included in the emulsion. for example,
an aminostilbene compound substituted with a nitrogen-containing heterocyclic group,
Aromatic organic acid formaldehyde condensate, cadmium salt,
It may also contain an azaindene compound.

The silver halide photographic emulsion used in the present invention can contain various compounds for the purpose of preventing fog during the manufacturing process, storage, or photographic processing of the light-sensitive material, or for stabilizing photographic performance. . That is, azoles such as benzothiazolium salts, nitroimidazoles, nitrobenzimidazoles, chlorobenzimidazoles, bromobenzimidazoles, mercaptothiazoles, mercaptobenzothiazoles, mercaptobenzimidazoles, mercaptothiadiazoles,
Aminotriazoles, benzotriazoles, nitrobenzotriazoles, polyhydroxybenzenes, mercaptotetrazoles (especially 1-phenyl-5-mercaptotetrazole), etc.; mercaptopyrimidines;
Mercaptotriazines, e.g. thioketo compounds such as oxadorinthione; azaindenes, e.g. triazaindenes, tetraazaindenes (particularly 4-hydroxy substituted (1,3,3a,7)tetraazaindenes), pentaaza Indenes, etc.: Many compounds known as antifoggants or stabilizers can be added, such as benzenethiosulfonic acid, benzenesulfinic acid, benzenesulfonic acid amide, etc.

Preferred ones include thiazolium salts; azaindenes:
Urazoles: Sulfocatechols Nioximes: Mercabutotetrazoles, nitrone ditroindazoles: Polyvalent metal salts described in U.S. Pat. No. 2,839,405, etc.
5 alts): Thiuronium salt (thiuronl
um 5altS) palladium, platinum and gold salts.

The photosensitive material of the present invention may contain a water-soluble dye in the hydrophilic colloid layer for various purposes such as preventing irradiation, preventing halation, and improving sharpness. Such dyes include oxonol dyes, hemioxonol dyes, styryl dyes, merocyanine dyes, cyanine dyes and azo dyes.

Among them, oxonol dyes; hemioxonol dyes and merocyanine dyes are useful.

In the photographic material of the present invention, when dyes, ultraviolet absorbers, etc. are included in the hydrophilic colloid layer, they may be mordanted with a cationic polymer or the like.

For the purpose of increasing sensitivity, increasing contrast, or promoting development, the photographic emulsion layer of the photographic light-sensitive material of the present invention contains, for example, polyalkylene oxide or its derivatives such as ethers, esters, and amines, thioether compounds, thiomorpholines, quaternary It may also contain ammonium chloride compounds, urethane derivatives, urea derivatives, imidazole derivatives, 3-pyrazolidones, and the like.

As the binder or protective colloid that can be used in the emulsion layer or intermediate layer of the light-sensitive material of the present invention, it is advantageous to use gelatin, but other hydrophilic colloids can also be used alone or together with gelatin.

In the present invention, the gelatin may be either lime-treated or acid-treated. Details of the method for producing gelatin are described in "The Macromolecular Chemistry Process of Gelatin" by Arthur Vuis (Academic Press, published in 1964).

Examples of the hydrophilic colloids that can be used include gelatin derivatives, graft polymers of gelatin and other polymers, proteins such as albumin and casein; cellulose derivatives such as hydroxyethyl cellulose, carboxymethyl cellulose, and cellulose sulfates; Il! such as sodium alginate and starch derivatives! derivative;
Various synthetic hydrophilic polymeric substances such as single or copolymers of polyvinyl alcohol, polyvinyl alcohol partial acetal, poly-N-vinylpyrrolidone, polyacrylic acid, polymethacrylic acid, polyacrylamide, polyvinylimidazole, polyvinylpyrazole, etc. be.

The photographic light-sensitive material used in the present invention may contain a dispersion of a water-insoluble or sparingly soluble synthetic polymer in the photographic emulsion layer and other wood-philic colloid layers for the purpose of improving dimensional stability.

For example, alkyl (meth)acrylate, alkoxyalkyl (meth)acrylate, glycidyl (meth)acrylate, (meth)acrylamide, vinyl ester (e.g. vinyl acetate), acrylonitrile, olefin, styrene, etc. alone or in combination, or these and acrylic acid, Use a polymer whose monomer component is a combination of methacrylic acid, α, β-unsaturated dicarboxylic acid, hydroxyalkyl (meth)acrylate, sulfoalkyl (meth)acrylate, sulfoalkyl (meth)acrylate, styrene sulfonic acid, etc. Can be done.

It is preferable to add a matting agent or the like to the emulsion layer, protective layer, or backing surface of the silver halide photographic material of the present invention.

As an example of a matting agent, a suitable particle size (particle size 0.01 to 30
It is preferable to use a material having a diameter of 1 to 8 microns. ) or silver halide, such as water-dispersible vinyl polymers such as polymethyl methacrylate;
Inorganic compounds such as barium strontium sulfate and colloidal silica are preferably used. Smoothing agents are also useful in preventing adhesion failure similar to matting agents, and are particularly effective in improving the frictional properties related to camera compatibility during filming or projection of motion picture films, and can be added as necessary. can.

A coating aid,
Various surfactants may be contained for various purposes such as antistatic, improving slipperiness, emulsifying and dispersing, preventing adhesion, and improving photographic properties (for example, promoting development, increasing contrast, and sensitizing).

For example, saponins (steroids), alkylene oxide derivatives (e.g. polyethylene glycol, polypropylene glycol condensates, polyethylene glycol alkyl ethers or polyethylene glycol alkylaryl ethers, polyethylene glycol esters,
polyethylene glycol sorbitan esters, polyalkylene gelicol alkylamines or amides, silicone polyethylene oxide adducts), glycidol derivatives (e.g. alkenylsuccinic acid polyglycerides, alkylphenol polyglycerides), fatty acid esters of polyhydric alcohols , nonionic surfactants such as alkyl esters of sugars; alkyl carboxylates, alkyl sulfonates, alkylbenzene sulfonates,
Alkylnaphthalene sulfonates, alkyl sulfates, alkyl phosphates, N-acyl-N-
Carboxy groups, sulfo groups, phospho groups, sulfate ester groups, phosphate ester groups, such as alkyl taurines, sulfosuccinates, sulfoalkyl polyoxyethylene alkylphenyl ethers, polyoxyethylene alkyl phosphates, etc. Anionic surfactants containing acidic groups such as amino acids, aminoalkyl sulfonic acids, aminoalkyl sulfates or phosphoric acid esters, amphoteric surfactants such as alkyl betaine, amine oxides; alkylamine salts, aliphatic or aromatic Cationic surfactants such as group quaternary ammonium salts, heterocyclic quaternary ammonium salts such as pyridinium and imidazolium, and phosphonium or sulfonium salts containing aliphatic or heterocycles can be used.

Various other additives may be used in the photographic light-sensitive material of the present invention, as required. For example, dyes, development accelerators, optical brighteners, color antifoggants, ultraviolet absorbers, etc. Specifically, research disclosure (
RESEARC) II) ISCL, [1StlRE)1
76, pages 22 to 31 (RD-17643, 1978) can be used.

The silver halide photographic material of the present invention may also be provided with an antihalation layer, an intermediate layer, a filter layer, an irradiation prevention layer, etc., if necessary.

In the photographic material of the present invention, the photographic emulsion layer and other layers are coated on one or both sides of a flexible support commonly used in photographic materials. Useful flexible supports include films made of semi-synthetic or synthetic polymers such as cellulose nitrate, cellulose acetate, cellulose acetate butyrate, polystyrene, polyvinyl chloride, polyethylene terephthalate, polycarbonate, baryta layers or α-olefin polymers ( For example, paper coated with or laminated with polyethylene, polypropylene, ethylene/butyne copolymer, etc. is used. The support may be colored using a dye or pigment, or may be black for the purpose of blocking light.

The surface of these supports is generally treated with an undercoat to improve adhesion with photographic emulsion layers and the like. The surface of the support may be subjected to corona discharge, ultraviolet irradiation, flame treatment, etc. before or after the undercoating treatment.

In the photographic light-sensitive material of the present invention, the silver halide emulsion layer may be provided not only on one side but also on both sides of the support.

The protective layer of the silver halide photographic light-sensitive material of the present invention is a layer made of a woody colloid, and the hydrophilic colloids used are those mentioned above. Further, the protective layer may be a single layer or a multilayer.

Specifically, silver halide photographic materials using the silver halide photographic emulsion of the present invention include X-ray photographic materials,
It can be used in lithographic photosensitive materials, black and white photographic photosensitive materials, reversal photosensitive materials, black and white photographic paper, colloid transfer process, silver salt diffusion transfer process, die transfer process, printout photosensitive materials, photosensitive materials for heat development, etc.

For photographic processing of the light-sensitive material of the present invention, for example, Research Bone Disclo
-sure) No. 176, pages 28-30 (RD-176
Any of the known methods and known treatment liquids as described in 43) can be applied. This photographic processing may be any photographic processing (black and white photographic processing) that forms a silver image depending on the purpose. Processing temperature is usually 1
The temperature is selected between 8°C and 50°C, but the temperature may be lower than 18°C or higher than 50°C.

In addition, other known development methods (eg, thermal development, etc.) may be used depending on the case. For example, developers used in black-and-white photographic processing can include known developing agents.

As developing agents, dihydroxybenzenes (e.g. hydroquinone), 3-pyrazolidones (e.g. 1-
phenyl-3-pyrazolidone), aminophenols (
For example, N-methyl-p-aminephenol), etc.
They can be used alone or in combination. The developing solution generally contains other known preservatives, alkaline agents, pHM'a agents, antifoggants, etc., and, if necessary, solubilizing agents, color toners, development accelerators, surfactants, and antifoaming agents. , a water softener, a hardening agent, a viscosity imparting agent, and the like.

A so-called "lith type" development process can be applied to light and bright photographic emulsions.

[Examples] Next, the present invention will be specifically explained with reference to Examples, but the present invention is not limited thereto.

Example 1 Chlorauric acid and sodium thiosulfate were added to a silver halide emulsion containing a cubic rhodium chloride salt with an average grain size of 0.19 μm, consisting of 65 mol% silver chloride and 35 mol% silver bromide, for chemical amplification. After sensitizing, add the following compound (1) as a sensitizing dye and 6-methyl-4-hydroxyate 3,3a,7- as a stabilizer.
Citrazaindene, the following compounds as inhibitors! (2) A coating solution was prepared by adding hydroquinone as an antifoggant, the following compound III as a hardening agent, and the following compound (2) as an adhesive to the glass surface, and the coating solution was applied to the air surface of the float glass and dried. (gelatin amount 4.1g/m2, rooting amount 3
．． 8g/m2) Sensitizing dye (1) f:H, cH, OH Inhibitor (II) Hardener (II+) CCCHzSChCH-1CH2)a ・nNIIz(
coz) 2503Kn-0,75 Glass adhesive (rv) The backing layer of this sample uses the following compounds A, B, and C as light-absorbing dyes, 20 cc of water, and 455 cc of methanol.
After dissolving using a solvent of 455 cc of ethanol and 50 cc of methyl cellosolve, 20 g of a copolymer of methacrylic acid and methyl methacrylate was added as a binder, dissolved, and coated.

Compound-A-〇38a Compound-B A sample of Compound- was developed, stopped, fixed, and washed with the following composition, and then immersed in a solution with the composition shown in Table 1 for 1 minute,
Wash with water (10 minutes) and dry.

The results of measuring the film strength of one layer of gelatin binder using a scratch meter are shown in Table 1. (Scratch strength is the load at which the black developed film is scratched and white spots occur.) Table 1 -1 shows that immersion in an acid or alkaline bath after fixing significantly improves the film strength after development.

Development Stopped at 20°C for 3 minutes and 15 seconds; Fixed at room temperature for 0 minutes and 30 seconds (30 acetic acid)
〃 2 minutes 00 seconds water washing 〃 10 minutes 00 seconds [Developer formulation] Hydroquinone 18g Anhydrous sodium sulfite 4g Sodium carbonate hydrate 85g Boric acid
6g potassium bromide 1.
To 8gEDT8-4)
1g triethanolamine 10g 5-nitroindazole
3mg sodium hydroxide po9
．． 9o NiiJ! Add water to make 1000 ml.

[Fixer prescription] (Composition A) Sodium sulfite 17g Sodium acetate trihydrate 6.5g Boric acid
6g sodium citrate 2 wood salt 2g acetic acid (qoH/W aqueous solution 1
13.6 ml (composition) Pure water (ion exchange water) 17 ml sulfuric acid (50 zero W/W aqueous solution) When using 4.7 g fixer, dissolve the above composition A in the order of composition in 500 mj2 of water and add to lft. I finished it and used it. The pH during the fixing period was about 4.3.

Example 2 Average grain size 0 consisting of 3 mol% silver iodide and 97 mol% silver bromide
．． After chemically sensitizing 05 μl of Lippmann type silver halide emulsion by adding sodium thiosulfate, a compound having the following structure as a sensitizing dye, a compound having the following structure as an inhibitor,
A coating solution containing the following compound as a development accelerator, a compound having the following structure as a hardening agent, and the compound (rV) of Example 1 as a silane coupling agent was directly applied onto glass and dried.

(gelatin fc6.8g/+a", heg amount 2.8g/m
'Met. ) Sensitizing dye inhibitor Development accelerator H COOCzHi Hardener CCCHxSO2CH-CHz) 4・nNHz (CH2
)xsOsK n#0.75Example 1 for this sample
A sample obtained by coating the same backing layer as in Example 1 was developed, stopped, fixed, and washed with the following composition, and then immersed in the same solution as described in Example 1 for 1 minute, and then washed with water (1
0 minutes) and dry. Table 2 shows the results of measuring the film strength of one layer of gelatin binder using a scratch meter.

Table 2 Table 2 shows that, as in Example 1, the film strength was significantly improved by immersion in an acid or alkali bath.

Development 20℃ Stop for 5 minutes Clean water at room temperature Fix for 0.5 minutes Wash with water at room temperature for 3 minutes Dry under running water at room temperature for 10 minutes Air dry [Developer composition] Hydroquinone 5g monomethyl-p
- Aminophenol sulfate 1g anhydrous sodium sulfite 50g potassium hydroxide
20g potassium bromide 0.5
Make up to 1000 ml with g water.

[Fixer composition] Ammonium thiosulfate 138.5g Sodium sulfite 21g Boric acid
6g Sodium thiosulfate 458
Ammonium acetate 20.9g glacial acetic acid
8.8g aluminum sulfate
Finish to 1000 tails with 14g concentrated sulfuric acid and 3.8g water.

[Effects of the Invention] As is clear from Examples 1 and 2, the membrane strength of the treated film can be improved by a simple method by immersing the treated film in an electrolyte solution with a pH of 5.0 or lower or a pH of 8.0 or higher. can be mentioned to a great extent.

Patent applicants for the above patents: Konishiroku Photo Industry Co., Ltd., patent attorneys Miki Nakajima, Kanko Yuben, and Mochi Kuramochi
Yutaka

Claims (1)

[Claims] After exposing a photographic material having at least one light-sensitive silver halide emulsion layer on a support, developing and fixing the material,
A method for processing a silver halide photographic material, which comprises immersing the material in an electrolyte solution having a pH of 5.0 or lower or a pH of 8.0 or higher.