JPH04163542A - Halogenated silver photosensitive material - Google Patents

Abstract

PURPOSE:To secure such a halogenated silver photosensitive material that is excellent in pressure resistance and inherent in high sensitivity and good fixability by containing a polyoxyethylene surface active agent in the same side as an emulsion layer. CONSTITUTION:A photosensitive material receives various kinds of pressure at time of film exposure or processing, causing a rise in sensitizing fog and so on. Therefore at least one side on a supporter has at least one sensitive emulsion layer consisting of grains of iodic silver bromide inclusive of iodine of 6 to 12 mol%, while polymer latex is impregnated in this emulsion layer pole, and a polyoxyethylene surface active agent is contained in the same side as the emulsion layer. As for the polymer latex available hereat, alkyl ester of acrylic acid, hydroxyalkylester, etc., are used. Likewise, as for the polyoxyethylene surface active agent, it is one that has at least more than two pieces of an oxyethylene group. With this constitution, such a photosensitive material that excellent in pressure resistance and inherent in high sensitivity and good fixability is securable.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention has particularly excellent pressure resistance, high sensitivity,
Related to silver halide photographic materials with good fixing properties [Prior art] Photographic materials are susceptible to problems such as bending the film or dropping objects onto the film during exposure or development. , subject to various pressures. It is widely known that photographic emulsions undergo desensitization or increase in sensitization fog due to this pressure. This damage to the image due to pressure is clearly undesirable, and various methods have been considered. For example, it is known that particles with internal dislocations have improved pressure but also reduced sensitivity to light.

By increasing the matting agent in the top layer, pressure sensitivity can be reduced for pressures such as abrasions.

However, this has the drawback of worsening the graininess of the film and deteriorating the transparency of unexposed areas. It has been desired to develop a sensitive material that does not have such drawbacks and has good pressure resistance.

[Object of the present invention]

In particular, the present invention has excellent pressure resistance, high sensitivity, and
The object of the present invention is to provide a photographic material having good fixing properties.

[Disclosure of the invention]

The object of the present invention is to have at least one photosensitive emulsion layer on one side of a support consisting of silver iodobromide grains containing 6 mol% or more and 12 mol% or less iodine. This was achieved by a silver halide photographic material characterized by containing a polymer latex in a layer and a polyoxyethylene surfactant on the same side as the emulsion layer.

Preferred examples of the polymer latex used in the present invention include alkyl esters, hydroxyalkyl esters, or glycidyl esters of acrylic acid, or alkyl esters, hydroxyalkyl esters, or glycidyl esters of methacrylic acid as monomer units, and have an average molecular weight of 100,000 or more, particularly preferably 3
It is a polymer of 00,000 to 500,000, and a specific example is shown by the following formula.

Polymer 1−+CH2−CH COOC4H9 Polymer 2 (CH2-CH2) seven 0OCJ7 Polymer 3 (CH2-C) 13ゎ□ C00CzHs Polymer 4 CH.

(CIiZ-Cha " COOC4H9 Polymer 5 CH3 (CH2-CH-→CH,-C entered CH.

(CH, -CH Roux (clh-C-containing COOC4H9C00C2CHCHz ■ CH The polymer latex used in the present invention has an average particle size of 2
An aqueous dispersion of a water-insoluble polymer of 0 mμ to 200 mμ,
The preferred amount used is 0.01 to 1.0, particularly preferably o, i to 0.8 in terms of dry weight ratio to 1.0 of gelatin used as a binder.

Furthermore, regarding polymer latex, the above-mentioned
5-5331, U.S. Pat. No. 2,852.386, U.S. Pat. No. 3,062.674, U.S. Pat.
, 411,912 can be referred to.

The polymer latex used in the present invention is contained in a photosensitive silver halide emulsion layer, and the thickness of the emulsion layer is 0.
．． The thickness is preferably 5 μm or more and IO μm or less.

If the emulsion layer has a thickness of less than 0.5 μm, the amount of polymer latex added is limited and the effects of the present invention cannot be achieved.

The polyoxyethylene surfactant used in the present invention preferably has at least 2 or more oxyethylene groups, more preferably 2 to 100 oxyethylene groups.

As the polyoxyethylene surfactant, surfactants represented by the following general formulas (1), (2) and (3) are particularly preferred.

General formula (1) % formula % General formula (2) General formula (3) % formula % In the formula, R represents a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, an alkenyl group, or an aryl group. ,A
is 10- group, -8- group, -COO- group, -NR,, group, -CON R5S group, 1l -SO□NR+s (here, R14 is a hydrogen atom, a substituted or unsubstituted alkyl group ).

R2 has the same meaning as the above-mentioned R, R, -A-.

R3,R,,R,,R,. , R, □ and R14 represent a hydrogen atom, a substituted or unsubstituted alkyl group, aryl group, alkoxy group, halogen atom, acyl group, amide group, sulfonamide group, carbamoyl group or sulfamoyl group. In the formula, R7, R1, R++ and RI3 represent a substituted or unsubstituted alkyl group, aryl group, alkoxy group, halogen group, acyl group, amide group, sulfonamide group, carbamoyl group or sulfamoyl group.

R5 and R6 represent a hydrogen atom, a substituted or unsubstituted alkyl group, an aryl group, or a heteroaromatic ring.

R6 and R,, R, and Re, R1 and R4゜, R1 and R, □
and RI3 and R14 may be linked to each other to form a substituted or unsubstituted ring. nl, R4, R3 and R4 are average degrees of polymerization of ethylene oxide and are numbers from 2 to 100.

Moreover, m is an average degree of polymerization, and is a number from 5 to 50.

Next, specific examples of the polyoxyethylene compound of the present invention will be shown.

Chemical example CIIH2Coo (CHzCHzO) 5HC+s
H2+COO(C[(zcHzO)-+5HCI7H3
3COO(CHzCHzO+-+sCH:+C+@t(
zso(CHzCHJh t.RC+2HzsO(CH
zCHzOh +oHC+6JhxO-+CHzC)I
zOto2311C2□H,5O(CH,CH20)-z
s) 1a+b=15 The amount of the polyoxyethylene surfactant of the present invention used varies depending on the type, form, coating method, etc. of the photographic material used, but in general, the amount used is equal to Ag1 of the photographic material. The amount may be 6.0 .mu. or more per mole, and 60 .mu. or more is particularly preferred.

The polyoxyethylene surfactant of the present invention is preferably added to a light-sensitive emulsion layer of a photographic light-sensitive material, but it may also be added to a non-light-sensitive layer. The distribution of iodine in the silver iodobromide grains in the present invention may be uniform or may be different between the inside and the surface. The average particle size is preferably 0.4 μm or more. In particular, it is preferably 0.5 to 2.0 μm. The particle size distribution may be narrow or wide.

The silver halide grains in the emulsion may have regular crystal shapes such as cubic, octahedral, tetradecahedral, rhombic dodecahedral, or irregular crystal shapes such as spherical, plate-like, potato-like, etc. It may consist of a mixture of particles of various crystal forms, which may have irregular crystal forms or composite forms of these crystal forms. Further, the particles may be tabular grains having a particle diameter of 5 times or more the particle thickness.

Further, among tabular silver halide grains, monodisperse hexagonal tabular grains are particularly useful grains.

The structure and manufacturing method of the monodispersed hexagonal tabular grains referred to in the present invention are as described in JP-A-63-151618, but briefly, the emulsion is composed of a dispersion medium and silver halide grains. A silver emulsion in which 70% or more of the total projected area of the silver halide grains has a ratio of the length of the side having the maximum length to the length of the side having the minimum length of 2.
The hexagonal tabular silver halide grains have the following hexagonal shape and two parallel surfaces as outer surfaces, and furthermore, the variation coefficient of the grain size distribution of the hexagonal tabular silver halide grains [its projection] It has a monodispersity of 20% or less (the value obtained by dividing the variation (standard deviation) of the particle size expressed by the circular diameter of the area by the average particle size). Although the crystal structure may be --like, it is preferable that the inside and outside consist of heterogeneous trogene compositions, and may have a layered structure.Also, the grains may contain reduction-enhanced silver nuclei. It is preferable.

The silver halide grains can be produced through nucleation-Ostwald ripening and grain growth,
The details are as described in Japanese Patent Application Laid-Open No. 61151618.

Further, the silver halide grains used in the present invention may be used by forming a core/shell type reduced-latency type emulsion with the hexagonal tabular grains as a core. Regarding the chemical aggravation method of the core and the method of forming the shell in this case, and development with a developer containing a silver halide solvent, Japanese Patent Application Laid-Open No. 59-1335
No. 42, British Patent No. 145,816.

The thickness of the shell in this case is preferably 1 to 100 lattices, preferably 5 to 50 lattices.

The hexagonal tabular grains used in the present invention may have dislocation lines inside. The presence or absence of dislocation lines and their number can be determined by observation with a low temperature (one-body He temperature) transmission electron microscope.

Hexagonal tabular grains containing dislocation lines are formed by adding iodide salt during the crystal growth period of the hexagonal tabular grains or using the hexagonal tabular grains as seed crystals and adding iodide salt during a certain period of the crystal growth period when the crystals are further grown. can do. In this case, a certain period refers to the entire crystal growth period from an instant (approximately 1/2 second). The rate of addition of the iodide salt to be added is determined when the difference between the state-changing content of the silver iodobromide deposited by the addition and the state-changing content of the silver iodobromide of the substrate is 5 mol % or more.

In the present invention, the photosensitive silver halide emulsion may be a mixture of two or more types of silver halide emulsions. The emulsions to be mixed may differ in grain size, halogen composition, sensitivity, etc. Substantially non-light sensitive emulsion (
(The surface or interior may or may not be covered) may be mixed and used, or may be separated into separate layers (for details, see U.S. Pat. No. 2,996.382, No. 3, 3
No. 97,987, etc.). For example, a spherical or potato-shaped photosensitive emulsion and a photosensitive silver halide emulsion consisting of tabular grains with a grain size of 5 times or more the grain thickness may be placed in the same layer or in different layers as described in JP-A-58-127921. May be used for layers. When used in different layers, the photosensitive silver halide emulsion consisting of tabular grains may be located on the side closer to the support or, conversely, on the side farther away.

The photographic emulsion used in the present invention is P, GIafkid-e.
Chemie et Ph1sique Photo by s
ographique (Paul Monte1, 1967), Pho by G.F. Duffin
togr-apic Emulsion Chemi
try (published by the Focal Press, 1
966), V, 1. Zelikman et al.
AuthorMakingand Coating Photogr
aphic Emulsion (The Foca
Published by lPress, 1964) Japanese Patent Publication No. 58-12792
It can be prepared using the methods described in No. 1 and No. 58-113926. That is, any of the acidic method, neutral method, ammonia method, etc. may be used, and the method for reacting the soluble root salt with the soluble halogen salt may be a one-sided mixing method, a simultaneous mixing method, or a combination thereof. .

A method in which halogenated particles are formed in an excess of silver ions (so-called back mixing method) can also be used. As one type of simultaneous mixing method, a method of keeping PAg constant in the liquid phase in which silver halide is produced, that is, a so-called Chondrald double jet method can also be used. According to this method, a silver halide emulsion consisting of silver halide grains having a regular crystal shape and a nearly uniform grain size can be easily changed.

Even if the crystal structure of silver halide grains is similar to the inside, there are also grains with a layered structure with different inside and outside, British Patent No. 635,841, US Patent No. 3,622,3
It may be of the so-called conversion type as described in No. 18, or silver halides of different compositions may be bonded by epitaxial bonding, for example silver rhodan, silver oxide, silver halide. It may be bonded with a compound other than the silver compound or with a compound other than the silver compound. Further, either a surface latent image type or an internal latent image type may be used. Cadmium salts, zinc salts, lead salts, thallium salts, iridium salts or their complex salts, rhodium salts or their complex salts, iron salts or iron complex salts, etc. coexist in the process of silver halide grain formation or physical ripening during silver halide production. You may let them.

Further, during grain formation, grain growth may be controlled by the presence of so-called silver halide solvents such as ammonia, thioether compounds, thiazolidine-2-thione tetrasubstituted thioureas, rhodanpotash, rhodanammonium, and amine compounds.

The silver halide emulsion used in the present invention may or may not be chemically sensitized. As a method for chemical sensitization, known methods such as sulfur aggravation method, reduction sensitization method, and noble metal sensitization method can be used, and these methods are used alone or in combination.

Among the noble metal sensitization methods, the gold sensitization method is a typical method and uses a gold compound, mainly a total complex salt. There is no problem in containing complex salts of noble metals other than pure metals, such as platinum, palladium, and iridium.

As the sulfur aggravating agent, in addition to the sulfur compounds contained in gelatin, various sulfur compounds such as thiosulfates, thioureas, thiazoles, rhodanines, etc. can be used.

As the reduction aggravating agent, stannous salts, amines, formamidine sulfinic acid, silane compounds, etc. can be used.

The photographic emulsion used in the present invention can contain various compounds for the purpose of preventing capri during the manufacturing process, storage, or photographic processing of the light-sensitive material, or for stabilizing photographic performance. Namely, azoles (e.g., benzothiazolium salts, nitroimidazoles, nitrobenzimidazoles, chlorobenzimidazoles, bromobenzimidazoles, nitroindazoles, penzotriazoles, aminotriazoles, etc.); mercapto compounds ( For example, mercaptothiazoles, mercaptohendithiazoles, mercaptohenzimidazoles, mercaptotetrazoles, mercaptotetrazoles (particularly l-phenyl-5-mercaptotetrazole), mercaptovirimidines, mercaptotriazines, etc.); thioketo compounds such as oxadorinthione; azaindenes (e.g. triazaindenes, tetraazaindenes (particularly 4-hydroxy substituted (1
, 3, 3a, 7) tetraazaindenes), pentaazaindenes, etc.); Known as antifoggants or stabilizers such as henzenethiosulfonic acid, benzenesulfinic acid, henzenesulfonic acid amide, etc. Many compounds can be added.

Specifically, RESEARCHDISCLO5URE I
tem 17643 ■ (December 1978 issue P, 24
~P, 25) or in the literature cited.

In particular, nitrone and its derivatives described in JP-A-60-76743 and JP-A-60-87322, JP-A-60-8
Mercapto compound described in Publication No. 0839, JP-A-57
The heterocyclic compound described in Japanese Patent No. 164735 and a complex salt of a heterocyclic compound and silver (for example, 1-phenyl-5-mercaptotetrazole silver) can be preferably used.

The light-sensitive silver halide emulsion 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. As exacerbating dyes, cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopholarianine dyes, styryl dyes, hemicyanine dyes, oxonol dyes, hemioxonol dyes, etc. can be used.

Useful sensitizing dyes for use in the present invention include, for example, RESE
ARCHDISCLO5URE Ite+ll 764
3 Section Vl-A (December 1978 P, 23), 1
teml 831 Section X (August 1979 P, 437)
It is described in or cited in the literature.

The sensitizing dye can be used at any stage of the photographic emulsion manufacturing process, or at any stage after manufacturing until immediately before coating. Examples of the former include a silver halide grain formation process, a physical ripening process, and a chemical ripening process.

The photographic emulsion layer or other hydrophilic colloid layer of the light-sensitive material produced using the present invention may contain the general formula ( It may contain various surfactants other than 1), (2) and (3).

For example, saponins (steroids), alkylene oxide derivatives (e.g. polyethylene glycol, polyethylene glycol/polypropylene glycol condensates, polyethylene glycol alkyl ethers or polyethylene glycol alkyl aryl ethers, polyethylene glycol esters, polyethylene glycol sorbitan esters, polyalkylene glycols Nonionic surfactants such as alkylamines or amides, polyethylene oxide adducts of silicones), glycidol derivatives (e.g. alkenylsuccinic polyglycerides, alkylphenol polyglycerides) fatty acid esters of polyhydric alcohols, alkyl esters of sugars, etc. Agents; alkyl carboxylates, alkyl sulfonates, alkyl hanzene sulfonates, alkylnaphthalene sulfonates, alkyl sulfates, alkyl phosphates, N-acyl-N-alkyl taurines, sulfosuccinates , sulfoalkyl polyoxyethylene alkylphenyl ethers, polyoxyethylene alkyl phosphates, etc., carboxy groups,
Anionic surfactants containing acidic groups such as sulfo groups, phospho groups, sulfate ester groups, phosphate ester groups; amino acids;
Ampholytic surfactants such as aminoalkyl sulfonic acids, aminoalkyl sulfates or phosphoric acid esters, alkylhetaines, and amisooxides; heterocycles such as alkylamine salts, aliphatic or aromatic quaternary ammonium salts, pyridinium, imidablylam, etc. Cationic surfactants such as quaternary ammonium salts and phosphonium or sulfonium salts containing aliphatic or heterocycles can be used. These are "Surfactants and their Applications" by Ryohei Oda et al. (Maki Shoten, 1964), "New Surfactants" by Hiroshi Horiguchi (Sankyo Publishing ■, 1975), and "Mank Cations Day Targent and Emulsion". (McCation Divisions, MC Publishing Company 1985) (rM
ccutcheon's Deter-gents &
Emulsifiers J (McCutche
on Divisions+MCPublishing
Co, 1985) ), JP-A-60-767
No. 41, No. 61-172343, No. 62-17345
No. 9, No. 62-215272, etc.

! # As the antistatic agent, in particular, JP-A-59-74554, JP-A No. 6(]-880849, JP-A No. 62-109044,
The fluorine-containing surfactant or polymer described in JP-A No. 62-215272, or the fluorine-containing surfactant or polymer described in JP-A-57-204540,
Conductive polymers or latexes (nonionic, anionic, cationic, amphoteric) described in No. 62-21527.2 can be preferably used. Examples of inorganic antistatic agents include ammonium, alkali metal, and alkaline earth metal halogen salts, nitrates, persalt salts, sulfates, acetates, phosphates, and thiocyanates. −
Composite oxides prepared by doping conductive tin oxide, zinc oxide, or their metallizations with antimony or the like, as described in Japanese Patent No. 118242, can be preferably used.

The surface layer of the photographic light-sensitive material of the present invention may contain silicone compounds described in U.S. Pat. No. 3,489,576 and U.S. Pat. In addition, paraffin wax, higher fatty acid esters, starch derivatives, etc. can be used.

Polyols such as trimethylolpropane, bentanediol, butanediol, ethylene glycol, and glycerin can be used as plasticizers in the hydrophilic colloid layer of the photographic material of the present invention.

The photo tag and non-photosensitive hydrophilic colloid of the present invention include:
Inorganic or organic hardeners may be included.

For example, chromium salts (chromium alum), aldehydes (
formaldehyde, glitaraldehyde, etc.), N-
Methylol compounds (such as dimethylol urea), dioxane derivatives, active vinyl compounds (1,3,5-triacryloyl-hexahydro-3-triazine, bis(vinylsulfonyl) methyl ether, N, N'-methylenebis-[β-( (vinylsulfonyl)propionamide], active hagelone compounds (2,4-dichloro-6-hydroxy-5-)riazine, etc.), mucohalogen acids, etc. can be used alone or in combination. Among them, JP-A No. 53-41220, No. 53-57257, No. 5
Preferred are the active vinyl compounds described in US Pat. No. 9-162,546 and US Pat.

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.

For example, 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; sodium alginate; polyvinyl alcohol, polyvinyl alcohol partial acetal, and A wide variety of synthetic hydrophilic polymeric materials can be used, such as single or copolymers of -N-vinylpyrrolidone, polyacrylic acid, polymethacrylic acid, polyvinylimidazole, polyvinylpyrazole, and the like.

As the gelatin, in addition to lime-treated gelatin, acid-treated gelatin or enzyme-treated gelatin may be used, and hydrolysates of gelatin may also be used.

In addition to the light-sensitive silver halide emulsion layer, the silver halide photographic material of the present invention may have non-light-sensitive layers such as a surface protective layer, an intermediate layer, and an antihalation layer.

There may be two or more silver halide emulsion layers, and the two or more silver halide emulsion layers may have different sensitivities, gradations, etc.

Further, IN or two or more silver halide emulsion layers or non-photosensitive layers may be provided on both sides of the support.

Cellulose triacetate films are preferred as supports for general photosensitive materials, and may be colored or uncolored for antihalation purposes.

As the support for X-ray photography, polyethylene terephthalate film or cellulose triacetate film is preferred;
In particular, it is preferably colored blue.

In order to improve the adhesion with the hydrophilic colloid layer, the surface of the support is preferably subjected to corona discharge treatment, claw discharge treatment, or ultraviolet irradiation treatment, or is made of styrene-butadiene-based latex, vinylidene chloride-based latex, etc. An undercoat layer may be provided, and a gelatin layer may be further provided on top of the undercoat layer. Further, an undercoat layer may be provided using an organic solvent containing a polyethylene swelling agent and gelatin. These undercoat layers can be surface-treated to further improve their adhesion to the hydrophilic colloid layer. The present invention will be further explained by showing examples below.

(Example) (CH2)4S03” (C)1m)gsOs
Na Compound (1) Preparation of Emulsion (A) (1 AgBr particles with average particle size of 0.60 μm) Solution-2 was added to Solution-1 at 58°C for 8 minutes. After 8 minutes, solution-3 and solution-4 were added simultaneously over a period of 20 minutes. 10 minutes after starting addition of solution-3 and solution-4,
Solution-5 was added. After completing the addition of Solutions-3 and Solution-4, 2 quarts of Compound (1) was added. The temperature dropped to 35°C,
After washing with water using the usual sedimentation method, gelatin 10
After adding 0g and dispersing at 40℃, pH=6.40, pA
It was adjusted to g=8.90. The temperature was raised to 57°C, and chemical sensitization was carried out using 6 parts of sodium thiosulfate, 1 part of chloroauric acid, and 9 parts of potassium thiocyanate. Next, add spectral sensitizing dye A to 230
■Added.

Solution-1 H, 01500cc Gelatin 24gKB r
33 gNa C16g Kl 9gKSCN
3gNH,OH(I
N) 160cc solution-2 A g N 03 48 gH
20200cc Solution-3 A g N 03 72 g
Hzo 300cc solution-4 Br H,0300cc solution-5 Glacial acetic acid 308Hz0
Preparation of 30cc emulsion (B) Same as emulsion (A), except that K1 = 4.5g, temperature 53
Particle growth was carried out at °C with a state modification content of 4 mol% and an average particle size of 0.
．． A silver iodobromide emulsion having a relatively irregular shape and having a thickness of 6 μm was prepared.

Preparation of emulsion (C) Same as emulsion (A), except that KI = 16 g, temperature 60°
Particle growth was carried out with
A plate-like silver iodobromide emulsion having a relatively irregular shape of 0.6 μm was prepared.

Preparation of Coated Samples Coated Samples 1 to 14 Each layer was coated on a triacetyl cellulose support according to the following formulation to obtain coated samples 1 to I4.

For the bottom layer, a solid dye dispersion was made as follows.

1 g of solid dye (1) was added to 22 cc of water and Trito
nX-200 surfactant 6.7% solution 2°7cc (TX
-200) (manufactured by Rohm Haas) in a ball mill, and then dispersed with gelatin. In order to remove large particles, centrifugation and ultrasonication were used to crush the aggregates.

Dye (1) Bottom layer Above dye solid (1) 0.14g/bo (average particle size 0.43μ) Gelatin 1.5g/bo 2nd layer (emulsion layer) Emulsion C Table 1) Ag amount 4.0g / is additive 4-hydroxy-6methyl-1.3.3a tetrazaindene 15■/BoCH,C)1.
C(CI+20)1)3 210■/Bopolipotacium p-vinylhenzenesulfonate 60■/r+(Polyoxyethylene (1) Cl1lH350iCHzCl(zo) 1J
(Table 1) (2) C,,H,3O-ec)1
．． C)1. Oh zJ (Table 1) Hardener 1.
2-bis(vinylsulfonylacetamido)ethane 60■/bopolymer latex (1) -+CH,CH) C00Czl(s Average molecular weight 370,000, (2) (CIZCH)- Average molecular weight 350,000 3rd layer (protective layer) Gelatin 0.9 g/po-4-bitroxy-6-methyl-1,3,3a.

7-Chitrazaindene 15■/Polyphotacium-p-vinylbenzenesulfonate 6■/Bopolymethyl methacrylate fine particles (average particle size 2μ 20■/i) [Measurement method of pressure blackening] A 5cm x 5c1n coated sample was An iron ball weighing 10 g was dropped from a height of 20 cm onto an iron plate with the emulsion-coated side facing up, and the above-mentioned development process was immediately carried out. The optical density of the part where the iron ball fell and the other part was measured, and the difference was calculated.

[Pressure blackening] - [Concentration of iron ball falling part] - [Concentration of other parts] [Residual A
g measurement method] A coating sample of 5 Ctll x 5 cm was placed in the fixing solution described above.
After soaking for 0 seconds, it was washed with water and dried. The amount of Ag remaining in the film was measured using a fluorescent X-ray method.

Claims (1)

[Claims] On at least one side of the support, there is at least one photosensitive emulsion layer consisting of silver iodobromide grains containing iodine of 6 mol % or more and 12 mol % or less, and a polymer latex is contained in the emulsion layer. 1. A silver halide photographic material comprising a polyoxyethylene surfactant on the same side as the emulsion layer.