JPS62253154A - Preparation of silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To obtain a phototsensitive material superior in covering power, graininess, and sharpness by coating with a photosensitive emulsion solution having a specified electric conductivity. CONSTITUTION:The photosensitive emulsion layer is prepared by applying the photosensitive emulsion solution having an electric conductivity of 2-200muOMEGA<-1>cm<-1>, preferably, 2-80muOMEGA<-1>cm<-1>. The silver halide grains contained in the emulsion layer of a photosensitive material obtained by applying said solution are almost regularly arranged by rendering the concentration of the coating emulsion solution far lower than that of the emulsion solution generally used for the usual desalting treatment, thus permitting the grains to exist effectively in high density in the emulsion layer and to be enhanced in covering power, accordingly, increased in sensitivity, remarkably improved in graininess, and raised in sharpness.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for producing a silver halide photographic material.

(Prior Art) Silver halide grains in the photographic emulsion layer of commonly used silver halide photographic light-sensitive materials overlap each other randomly and non-uniformly in some places, or are there blank areas where no grains exist? Form it.

It is contained dispersed in the emulsion layer. Such silver halide grains? g having an emulsion layer containing irregularly dispersed
In optical materials, it is generally possible to improve covering power by reducing the particle size, that is, to save silver, and to improve graininess and sharpness, but on the other hand, what about the particle size? If you make it smaller, the sensation will decrease.

A photosensitive material that combines both? It's important to get it. Furthermore, in terms of covering power, the shape of the silver halide grains can be made into a flat plate to improve the coating power. However, such tabular silver halide grains are generally unstable and therefore undesirable (
For example, see Japanese Patent Application Laid-open No. 113926/1983).

Are these silver halide grains the width of a photographic emulsion in a light-sensitive material? This cannot be improved by arranging them regularly, and such non-randomization is an issue that is being studied in various fields in the semi-industry. One method for regularly arranging silver halide grains is to form irregularities (or microcells) in a regular arrangement on a support by means such as pattern exposure of a photoresist or embossing of a deformable plastic material. ? Created and silver halide grains in its four parts or convex parts? Application No, ffi & W lengthened as a result of silver halide grains? Methods of regular arrangement have been proposed (for example, Japanese Patent Laid-Open No. 57-155533 and GB2091433).
(see book).

(Problem to be solved by the invention) However, do these methods require special supports? Multi-step operation? In particular, the method of forming silver halide grains in the method disclosed in JP-A No. 57-155533, in which silver halide grains are separately distributed, is This method uses a water-bath complex solution of complexed silver halide, and overcomes the problem that the so-called commonly used silver halide grain formation technology cannot be applied.

Historically, in the emulsion of a completed light-sensitive material, there remained a part of the support containing silver halide grains spaced apart in a regular arrangement, which could have a considerable effect on the image quality after processing. Various constraints to remove? The receiving process also becomes more complicated.

Also, because of the gaps that inevitably exist between silver halide grains, is it the most dangerous? I couldn't make it higher.

Historically, negative-type photosensitive materials have had the problem of poor image quality when printing paper (minimum density).

Do you feel like you are in the field of love and power? Without lowering it?
lt force 2 graininess and sharpness M can be same as above. It is desired to produce a photographic five senses IV material in which silver agenide grains are arranged in an intelligent manner by a simple method.

(Means for solving the proboscis problem) The above items are the most popular 1M & original emulsion layer.

It has been found that the problem can be solved by a special method of producing a photosensitive material using photosensitive materials, which is characterized by coating a photosensitive emulsion solution having an electrical conductivity of less than 200%.

In the present invention, the ytts of the photosensitive emulsion solution at the time of coating is
+αIt 200 , a 8 cm-' or more, preferably 80 HSi1 inhibition 2-uScm B1. Also, if the glare is less than the above specified value only during application of the emulsion solution, is this the object of the present invention? can be achieved. Therefore,
The strength (9) of the emulsion solution after 11N coating is not particularly specified by the present invention.

If the number of heavy rings exceeds the above 200〃Sα-It, the effects of the present invention cannot be achieved.

During coating of emulsion solution of conventional silver halide photosensitive material. That is, the conductivity of the solution after normal desalting treatment is generally about 1,500 to 3,000 .mu.rrn, and the electrical conductivity lf in the present invention is in a much lower range than that of conventional solutions.

Silver halide grains, etc. in the emulsion solution are separated from the silver halide grains in the emulsion solution by natural sedimentation or centrifugation. A part of the dispersion medium after sedimentation, for example, as a supernatant liquid, is removed by decantation, suction and discharge, etc. In the case of historical electrocardiography, water is supplied and the removal is repeated once or several times, or -1095, JP-A-57-20
No. 9823, US Pat. No. 4,324,2012, and US Pat. No. 3,782,953, silver halide grain dispersion bath liquids in physical ripening medium or physical ripening chamber are subjected to ultraviolet filtration. If necessary, water can be supplied and one dispersion medium can be taken out by the ultra-one-pass method, so that five cycles can be carried out.

C2, which reduces the electrical conductivity (9) in the emulsion solution, may be treated by the long-known Tardel water washing method, which is carried out by gelatinizing gelatin. Sodium, anionic surfactant, anionic polymer (e.g. polystyrene sulfonic acid),
Alternatively, a precipitation method (a curation) using a gelatin derivative (for example, aliphatic acylated gelatin, aromatic acylated gelatin, aromatic carno (moylated gelatin, etc.)) may be used. In the sedimentation method, the emulsion liquid having the specific conductivity If' of the present invention can be prepared by supplying a larger amount of water than in the conventional method. dwarf) na〃
), particularly those with ultraf-transmissivity are preferred.

The pH of the emulsion bath solution for coating is below 7, especially below 5.

is preferable, and the temperature during application is below 50°C, especially at 40°C.
The following are preferred.

Since the photographic emulsion solution used in the present invention has a low degree of permeability (low 1V), it is a special process for photosensitive materials.

Storage width or fog during photo processing? Prevent or copy: lr, performance? For the purpose of stabilization, it is preferable to incorporate various compounds into the photographic emulsion. i.e. azoles (e.g. benzothiazolium salts).

Nido-a imidazoles, nitrobenzimidazoles,
OCI benzimidazoles, bamobenzimidazoles, nitroindazoles, benzotriazoles, aminotriazoles, etc.)
For example, mercaptothiazoles, mercaptobenzothiazoles, mercaptobenzimidazoles, mercaptothiadiazoles, mercaptotetrazoles (especially 1-phenyl-5-mercaptotetrazole), mercaptopyrimidines, mercaptotriazines, etc.); thioketo compounds such as; azaindenes (e.g. triazaindenes, natraazaindene'f@) (particularly 4-hydroxy substituted (113+ 3
a + 7) Tetraazaindene @), pentaazaindene, etc.); benzenethiosulfonic acid. Known as antifoggants or stabilizers such as benzenesulfinic acid, benzenesulfonic acid amide, etc. Can hold 8 mouthfuls of many compounds.

In particular, the η-mercapto compounds described in U.S. Pat. No. 3,295,976, U.S. Pat.
Tetrazeindenes as described in No. 88 and No. 320251.2, especially 1-phenyl-5-mercaptotetrazole and 4-hydroxy-6-metal-1,3,3a
, 7-tetrazaindene are preferred.

For detailed examples of these and how to use them, see, for example, U.S. Pat. Nos. 3,954,474 and 3,9
Those described in Japanese Patent Publication No. 82,947 and Japanese Patent Publication No. 52-28.660 can be used.

Antifoggants can be present in one emulsion layer and/or other layers of the invention. Further, it may be added at any stage in the emulsion Na that can be routinely employed.

It is prepared by mixing in the presence of a water-soluble polymer solution such as

In addition to silver chloride and silver bromide, silver halides include
Mixed silver halide 1, such as chlorobromide.

Silver iodobromide, silver chloride iodobromide, etc.? Can be used.

The average grain size of the silver halide grains (the grain diameter of spherical or approximately spherical grains; in the case of cubic grains, the ridged grain size is expressed as an average based on the projected area) is 0. 05 to 2b is preferred, and 0.1 to 1.5 is particularly preferred. The particle size distribution may be narrow or wide.

Although it is preferable that the particle size distribution be narrow, in some cases, that is, when it is preferable to create a regular arrangement, it is also preferable to fuse particles having different average particle sizes.

The shape of these silver halide grains may be any one such as a cubic island, a hehedral, or a mixed crystal shape thereof. Among them, cubes, octahedrons,
Dodecahedrons and dodecahedrons are preferred.

Also, two or more types of silver halide photographic emulsions formed separately'
5! - May be mixed. Historically, the crystal structure of silver halide desiccant is uniform even inside.

Also, the inside and outside are J! It has a layered structure of 4 layers and 6 layers.

British Patent No. 635,841, US Patent No. 3,622゜31
It may be of a so-called conversion type as described in No. 8. Also, image wearing? It may be mainly of the type formed on the surface or of the internal latent image type formed inside the particle.

Photo 1 of these - Breasts Ml'ti Mee, c%, rT
he thenryof the photog
rapicProceSqJ? , 4th edition + Mac
Published by Millan (1976); P.

Written by GrafkideS, rchim+e et Ph
otog-r2phjqueJ, Paul Mont
Published by e1 (1957) iG, F, I) u f fi
Author: rPhntographicEmulsinn
ChemistryJ, The F'ncal
Pres9+lI (1966); V, L, Ze
l ikmanet allrMaking and
CoatingPhnt-ograph+c Em
ul S 1onJ, T”he Mncal
It can be refined using the method described in Press (1964) and the like. That is, acid method.

Either the width method or the ammonia method may be used, and also @soluble silver increase and soluble halogen field? The reaction may be carried out by any method such as a one-sided mixing method, a simultaneous mixing method, or a two-way combination method.

It is also possible to use a method in which particles are formed in an excess of silver ions (so-called back-mixing method).

One type of simultaneous mixing method is a method of keeping pAg'r constant in a liquid phase mainly composed of silver halide.

A so-called control a ruby double jet method may also be used.

According to this method, a silver halide emulsion having a regular crystal shape and a nearly uniform grain size can be obtained.

Two or more hexafluoride silver emulsions formed separately? They may be used in combination.

In the process of silver halide grain formation or physical ripening, aluminum salts, zinc salts, lead salts, and thallium salts are used.

Iridium salt or its complex salt 1 Iron salt or its complex salt, iron base or iron complex salt, etc.? They may coexist.

The thioether compounds described in US Pat. No. 3,574,628? It is preferable that they coexist.

Although a so-called immature emulsion (primitive emulsion) which is not chemically sensitized may be used as the silver halide emulsion, it is usually chemically sensitized. For chemical sensitization, I\i
'I Glafkidas or Zpli-kman et al., or edited by H. Frleser.

rl)+p Grundl;Igen der P
hnto grab-hischen prnze
sSe mit 5ilberhal.

genidenJ, AkademiSche Ve
The method described in RlagsgeSellschaft (1968) can be used.

That is, sulfur-containing compounds that can react with active gelatin and silver (for example, thioureas, thioureas, etc.).

mercapto compounds, rhodanines), red sensitization method using fr-, reduction sensitization method using reducing substances (e.g. stannous salts, amines, hydranine derivatives, formamidine sulfinic acid, silane compounds), noble metals. Sensitization methods using compounds (for example, gold compounds, complex salts of group metals of periodic system such as platinum, iridium, palladium, etc.) can be practiced alone or in combination.

Chemical sensitization may be carried out on the emulsion before or after the desalting treatment according to the present invention, but preferably after the desalting treatment. Possible binders or colloids include:
gelatin? Advantageously, other hydrophilic colloids can be used.

Examples include gelatin derivatives, graft polymers of gelatin and other polymers, white matter such as albumin and casein; cellulose derivatives such as xyethyl cellulose, carboxymethyl cellulose, cellulose sulfate esters, and sodium alginate.

Sugar derivatives such as starch inducers; single or Copolymer y2n: various synthetic hydrophilic polymer substances? Examples of gelatin that can be used include lime-treated gelatin, acid-treated gelatin 'PrBull, soc
, sc+, Phnt.

Enzyme-treated gelatin as described in JapanJNo, p. 16.30 (1966)? May also be used.

Hydrolyzed gelatin and enzymatically decomposed products can also be used.

Examples of gelatin derivatives include gelatin, acid halides, acid anhydrides, isocyanates, bromoacetic acids, alkanesultones, vinyl sulfonamides, maleimide compounds, polyalkylene oxides, epoxy compounds, etc. Those obtained by reacting compounds are used.

The photographic light-sensitive material of the present invention may contain an inorganic or organic hardening agent in the photographic emulsion layer and other hydrophilic comids. For example, chromium salts (chromium alum, chromium acetate, etc.), altehyde derivatives (formaltech ρ, glyoxal, geltaraldehyde, etc.), N-methylol compounds (dimethylolborine, methylaldimethylhydantoin, etc.).

Dioxane visiting conductors (2,3-dihydroxydiochitin, etc.), active vinyl compounds (1,3,5-triacryl-hexahydro-8-triazine, etc.).

1,3-vinylsulfonyl-2-propatol, etc.),
Active halogen compounds (2,4-dichloro-6-hydrolyazine, etc.), mucohalogen acids (mucochloric acid, mucophenoxychloroic acid, etc.), etc. can be used alone or in combination.

Among these, active vinyl compounds and active halogen compounds are particularly preferred.

The photographic emulsion layer or other hydrophilic colloid layer of the light-sensitive material prepared using the present invention may be used as a coating aid, to prevent caesar, to improve slipperiness, to emulsify and disperse, to prevent adhesion, and to improve photographic properties (e.g.
One of various surfactants may be included for various purposes such as development acceleration, hard pot formation, sensitization, etc.

For example, Nabonine (Nu'laid yarn), alkylene oxai)'' derivatives (e.g. polyethylene glycol, polyethylene glycol/polypropylene glycol combinations, polyethylene glycol alkyl ethers or polyethylene glycol alkyl aryl ethers, polyethylene glycol esters, polyethylene glycol sorbitan esters, polyalkylene glycol alkylamines or shimaamides, 710 types of silicone with polyethylene oxide), glycidol derivatives (
Nonionic surfactants such as alkenylsuccinic acid polyglycerides, alkylphenol polyglycerides), fatty acid esters of polyhydric alcohols, and alkyl esters of sugars; alkyl carboxylates, alkyl sulfonates, alkylbenzene sulfones 61. Alkylnaphthalene sulfonates, alkyl sulfates, alkyl phosphates + N-acyl-N-alkyl taurines, sulfosuccinates, sulfoalkyl polyoxyethylene alkylphenyl ethers.

Carboxy groups, sulfo groups, and phospho groups such as polyoxyethylene alkyl phosphates.

Acidic groups such as sulfate ester groups and phosphate ester groups? Anionic surfactants containing; amphoteric surfactants such as amino acids, aminoalkyl sulfonic acids, aminoalkyl sulfates or phosphoric acid esters, alkyl betaines, amine oxides; alkylamine salts, aliphatic or aromatic quaternary surfactants;
Cationic surfactants such as quaternary ammonium salts, complex quaternary ammonium salts such as pyridinium and imidazolium, and aliphatic or heterocyclic containing phosphonium or sulfonium salts can be used.

Among these, fluorine-containing surfactants and polyoxyethylene nonionic surfactants described in JP-A-60-80849 are preferred.

The photographic emulsions used in the present invention may be spectrally sensitized with methine dyes and others. The pigments used are cyanine pigments and merocyanine pigments.

Included are complex cyanine dyes, complex merocyanine dyes, hoa-polar cyanine dyes, hemicyanine dyes, styryl dyes and hemioxonol dyes. Particularly useful dyes are those belonging to the cyanine dyes, meacyanine dyes, and complex merocyanine dyes. These pigments contain a nucleus normally used for cyanine pigments as a basic heterosegmental nucleus. can also be applied. That is, viroline nucleus, oxazoline nucleus, thiazoline nucleus, virol nucleus, oxazole nucleus,
Thiazole nucleus, selenazole nucleus, imidazole nucleus, tetrazole nucleus, pyridine nucleus, etc.; t+hti in these nuclei
Nuclei in which the formula hydrocarbon atoms are fused; and nuclei in which aromatic hydrocarbon rings are fused to these nuclei.

Namely, indolenine nucleus, benzindolenine nucleus.

Indole nucleus, penzoquinadole nucleus, naphthoxazole nucleus, benzothiazole nucleus, naphthothiazole nucleus, benzoselenazole nucleus, benzimidazole nucleus, quinoline nucleus, etc. are applicable. These nuclei may be replaced by one carbon atom.

Is there a ketomethylene structure in merocyanine dyes or conjugated melonanine dyes? The nucleus having pyrazolin-5-one nucleus, thiohydantoin nucleus, 2-thioxazolidine-2,
5- to 6-membered heterozygotic nuclei such as 4-dione nucleus, thiazolidine-2,4-dione nucleus, rhodanine nucleus, and thiobarbyl acid root? It can be passed.

In the photographic effect of the present invention, the phase material is added to the photographic emulsion layer for the purpose of increasing sensitivity, increasing contrast, or accelerating development.

For example, the polyalkylene oxide or fc may include derivatives thereof such as ethers, esters, and amines, tizether compounds, thiomorpholines, quaternary ammonium chlorides, urethane derivatives, raw material derivatives, imidazole derivatives, 3-pyrazolidones, and the like. For example, US Patent 2,
No. 400,532.

No. 2,423,549, No. 2,716,062, No. 3,617,280, No. 3,772,021, No. 3
．． 808.003 and British Patent No. 1°488.991 can be used.

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 or other hydrophilic colloid layer for the purpose of improving dimensional stability. For example, alkyne (meth)acrylate, alkoxyalkyl (meth)acrylate, glycidyl (meth)acrylate.

(meth)acrylamide, vinyl esters (e.g. vinyl acetate), acrylonitrile, olefins.

Styrene alone or in combination, or in combination with acrylic acid, methacrylic acid, α, β-unsaturated dicarboxylic acid, hyaloxyargyl (meth)acrylate, sulfoalkyl (meth)acrylate, styrene sulfonic acid, etc.? A polymer containing sheep serum can be used.

In the present invention, the silver halide photographic emulsion bath (i) containing the fixed heavy ring (1f) is prepared using a coating method commonly used in this field. Tip type application, Kubofu liquid? Extrusion type coating that is applied by extruding through a slit (for example, Japanese Patent Publication No. 44-23758, U.S. Patent No. 3474758, and U.S. Patent No. 3996885'
i4i specification reference 1! on a support using Curtain Flow type coating with stabilization of liquid pools (see e.g. U.S. Pat. No. 3,632,374 and U.S. Pat. No. 3,508,947). Or it can be coated on top of other layers (subbing layers, other emulsion layers, etc.).

The support was undercoated according to the usual method, for example, Research Disk Jar Vol. 176 (1978゜■);
This can be carried out by the method described on page 28 of RD-17643 [X■].

The emulsion layer coated in this manner is dried according to conventional methods.

According to the present invention, by making the salt concentration of the emulsion solution for coating much lower than that subjected to ordinary desalting treatment, surprisingly, the emulsion layer of the light-sensitive material obtained by coating it is It was found that silver halide grains were contained in a substantially regularly arranged arrangement.

Since the silver halide grains are arranged almost regularly in the emulsion layer, the grains are present in the emulsion layer in a highly dense and effective manner, increasing the covering power and therefore reducing coating recording. can.

Here, the covering power (CP) is:

CP=D/M (D is optical) L is usually measured as a diffused source.

and 1M is defined as silver spears per unit area, usually V/- or Li/m'. The greater the covering power, the more a certain optical #(9) can be achieved with a smaller amount of recording, and therefore the silver savings can be achieved. In general, the smaller the particle size, the greater the covering power, but the sensitivity decreases. By regularly arranging silver halide grains according to the present invention, it is possible to increase the covering power, so even if the grain size is increased by one grain size (i.e., without sensitivity change or decrease), the covering power can be maintained at a constant level. It is something that can be achieved.

In addition, the so-called granularity is caused by the fact that the arrangement of individual silver halide grains is irregular, and the silver grains from the face to the bottom of the emulsion layer are arranged differently from each other, so that groups of silver grains appear granular. Therefore, if each particle is regularly arranged, the individual particle size will be large, and therefore, even if g# is large, the graininess will not be noticeable and will be improved. Also about sharpness.

By regularly arranging the silver halide grains in the emulsion layer, it is possible to increase the density of the silver halide grains in the emulsion layer, so it is possible to reduce the film thickness of the emulsion layer without reducing the maximum density. Therefore, it is thought that Senkeisho will improve.

It is highly desirable that such a timely photosensitive material can be obtained by a very simple method such as that of the present invention.

Also, according to the present invention, an emulsion with a low hydrophilic colloid content? On the emulsion layer obtained by coating and drying, a solution containing a hydrophilic colloid as described above and/or a salt such as an alkali halide (each may optionally contain an antifoggant as described above) is further added. Is it possible to apply a retaining layer using the method normally used for emulsion solution coating (e.g. extrusion coating method)? Making.

It is also possible to further improve the storage stability of the photosensitive material.

Further, various '&710 agents as described above may be appropriately contained in this placement layer.

The photographic material finally obtained may contain 1 m & 2 or more layers of emulsions which are removed according to the method of the present invention. The various additives that can be used in the photosensitive material of the invention, the emulsion method, the coating and drying method, and the method of developing the photosensitive material of the present invention are prepared according to the conventional methods.
Disclosure (Research 1)iscl
nSure) Volume 176, pages 22-31 (December 1978)? For reference (you can do this).

The silver halide photographic material produced according to the present invention is
It can be used in all kinds of light-sensitive materials to which ordinary silver halide photographic light-sensitive materials can be applied, such as particularly X-ray sensitive materials, general black-and-white negative light-sensitive materials, instant color photographic X-sensitive materials, color negative light-sensitive materials, and the like.

(Practice Fee) The present invention will be illustrated below with examples, but the scope of the present invention is not limited by these descriptions.

Practical material 1 In a pAg control V/double jet preparation device, which controls the pAg constant during the formation of special particles of a photosensitive material, the device was adjusted to -50 mV-75°C, and 50 f of gelatin, 1
Gold sulfur was increased before the emulsion containing silver bromide grains with 1 grain size IZI (coefficient of variation 15%) and octahedral grains by adding a solution of 70% silver nitrate (108% silver) and a potassium bromide solution. 1) Add antifoggant 1-
0.1 smol of phenyl-5-mercaptotetrazole was added. In this way, a p# emulsion (a) is obtained.

Emulsion a) 'Y, gAl? 'Molecular weight cutoff 13 at 38℃,
Using a 000 acrylonitrile ultrafiltration membrane (ACL manufactured by Asahi Kasei Corporation), the inlet pressure was 1.8 Kv/cd.
, outlet pressure 1. QKg/- pressure? Two treatments were carried out by adding the permeated liquid and ion-exchanged water while passing through ultraviolet rays.

Finally, total emulsion weight Ikg and conductivity #40. #Sα-1 milk I! I got r11.

The coating emulsion solution thus obtained was coated with a gelatin film of 0.19/m' by a normal dip coating method.
It was coated on a polyethylene terephthalate support coated with F at a coating silver of y 2 r /m', and 20
Dry at ℃.

Gelatin, a stabilizer (4-human °x-6-methyl-" + 3.3 a + 7-tetrazaindene) and a hardener (1-oxy-3,5-dichloro-s-
) Reazine sodium salt) Coating solution containing ? A protective layer was formed by coating and drying to obtain a photosensitive material A. Protection
# contains 0.1 mlJmol/m” of stabilizer and 501n
A hardener of 9/m' was included.

Development process 1t85'e Material A was exposed to 400 lux tungsten light for 1/10 second through an optical wedge, and then the following composition was obtained. The film was developed for 10 minutes at 20° C. using a surface-improving solution.

<Developer composition> N-methyl-p-aminophenol image acid salt 2.32 Ascorbic acid 10. Of Potassium Methacetate 35.09 Potassium Bromide
1.02 Add water
The maximum density M and graininess of the image obtained by stopping, fixing, and washing with water according to the 1A conventional method were measured. The results are shown in the attached table.Example 2 and Comparative Example 1 The desalting operation for the emulsion a) in Example 1 was adjusted appropriately to obtain a conductivity M of 100/J 5crn-
Coating emulsion solutions of ``(Example 2) and 300H8α-1 (Comparative Example 1) were prepared and coated on a F-coated support so that each coated silver mold was 2 mm/m'' in the same manner as the actual flying resistance. Photosensitive materials B and C were obtained in the same manner as in Example 1 except for coating, and each was developed in the same manner as in Example 1. the result? Shown in the attached table.

Comparative Example 2 Emulsion a) in Example 1? The treatment was carried out using the so-called flocculation method. That is, emulsion a) was added with a copolymer of potassium paravinylbenzenesulfonate and acroylmorpholine as a precipitant (molecular ratio of potassium paravinylbenzenesulfonate 77%; limit preparation (30C) in an aqueous IN sodium nitrate solution; 5% aqueous solution of 1.380) Q7
0 cc of the mixture was added at 90°C, and the mixture was stirred continuously. A 10% methanol solution of lithyl # was added to adjust the pH to 4. When stirring is stopped, the complex between gelatin and copolymer becomes silver halide? The supernatant liquid was removed by tadecane distillation to cause coagulation and sedimentation. Then 1% salicylic acid water? aW? After adding and stirring vigorously, the procedure of settling again at room temperature and removing the supernatant liquid by decantation was repeated 22 times. Next, a 10% aqueous sodium carbonate solution was added to raise the pH to 6, the emulsion was redispersed, gelatin was added, and the final concentration was 36.
00! An emulsion was completed in such a manner that the emulsion of JScrrL was obtained.

Is this an emulsion solution for coating? The coating was applied and dried in the same manner as in Example 1, and then a protective layer was formed to obtain a photosensitive material. It was developed in the same manner as in Example 1.

The results are shown in the attached table.

(*) CP (-W overturning power) is Dmax/silver density in the emulsion.

(**) Granular Measurement aperture diameter 24μ Root mean square (RMS) measured by microdensitometer
was measured at Dmax-0.25.

evaluation RMS 0.05 or more 1 0.046-0.05 2 0.042-0.046 3 0.038-0.042 4 0.037 or less 5 Root nodule shapes with large evaluation values are good.

Both graininess and covering power were improved.

(Effects of the Invention) As is clear from the above results, according to the present invention, a halide photosensitive material with improved covering power, graininess, and sharpness can be produced in a very simple manner.

Procedural Amendment 1.1 1985 Patent Application No. 81134 2, Name of the invention Method for producing silver halide photographic light-sensitive materials 3, Person making the amendment Relationship to the case: Name of patent applicant ( 520) Fuji Photo Film Co., Ltd. 4, Agent 100 Address: 29th floor, Kasumigaseki Building, 3-2-5 Kasumigaseki, Chiyoda-ku, Tokyo, Takosara Office, Kasumigaseki Building, P.O. Box No. 49 Telephone: (581)-9601 (Representative) Eiko Patent Office Name Patent Attorney (8107) Kiyoyuki Sasaki
(2 others) Amend the detailed description of the invention column as follows.

(1) Insert "reproducibility of manufacturing" before "unstable" on page 2, line 8 of the specification box.

(2) "Photoresist" on page 2, line 16 of the same book is corrected to "photoresist."

(3) rGBJ on page 3, line 2 of the same book is amended to read "British Patent No.".

(4) "No. r43242012" on page 5, line 17 of the same book is amended to "No. r4334012."

(5) 1 in front of "r-50mV" on page 24, line 19 of the same book.
Insert "for the Taikoma calomel electrode."

(6) Insert "contains" before "solution and" in the first line of page 25 of the same book.

(7) r90'cJ on page 28, line 2 of the same book as r40'c
Correct it with J.

Claims (1)

[Claims] In manufacturing the photosensitive emulsion layer, 200μScm^-^1
1. A method for producing a silver halide photographic material, which comprises coating a photosensitive emulsion solution having the following electrical conductivity.