JPH03142441A - Silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To sufficiently enhance the film strength of the photosensitive material, to reduce drying time after development, and to enable rapid processing by incorporating a polymer having a clouding point. CONSTITUTION:This photographic sensitive material is provided on a support at least one layer containing the polymer having a clouding point and repeating units each represented, for example, by formula I in which R1 is H or 1 - 6 C alkyl, and each of R2 and R3 is H or 1 - 10 C alkyl, aryl, or the like. This polymer can be embodied by the copolymer of formula II and the like, and it can be used in combination with gelatin and the like.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a photographic material with improved rapid processing properties without impairing photographic properties.

[Background of the invention]

In general, hydrophilic colloid films used for producing photographic light-sensitive materials are required not only to have no adverse effect on photographic sensitivity characteristics but also to have a certain level of strength in terms of film physical properties. Therefore, when coating a hydrophilic colloid layer such as a silver halide emulsion layer, intermediate layer, or protective layer on a support, water-soluble polymers or polymer latexes in which various monomers are polymerized are conventionally used in the hydrophilic colloid layer. to contain,
Various attempts have been made to improve the physical properties of the hydrophilic colloid films formed, such as dimensional stability, scratch strength, flexibility, pressure resistance, and drying properties. From this point of view, Japanese Patent Application Laid-open No. 61-69061,
The use of acrylamide derivatives in JP-A No. 61-151527 and US Pat. No. 2,376.
The use of vinyl acetate polymer latex in US Pat. No. 3,325,286
In Japanese Patent Publication No. 45-5331, polymer latexes such as n-butyl acrylate, ethyl acrylate, styrene, butadiene, vinyl acetate, acrylonitrile, etc. are used. Kosho 46
JP-A-22506 discloses that a polymer latex of alkyl acrylate, acrylic acid, and sulfoalkyl acrylate is used.
In the publication, it is proposed to use a polymer latex of 2-acrylamide-2, methylpropanesulfonic acid, etc. Incidentally, in recent years, rapid processing of photographic materials has progressed, and demands on film properties have also increased. This rapid processing is primarily made possible by the reduction in development and drying times. However, although this drying time can be shortened by reducing the amount of binder in the film, there is a limit to the means to reduce the amount of binder because it causes an adverse effect on the film strength. Further, even if the above-mentioned proposed polymer or polymer latex is used as a binder, the drying time can hardly be shortened. That is, with conventional binders, although they have sufficient film strength, they have not been able to shorten the drying time after development.

[Disclosure of the invention]

An object of the present invention is to provide a silver halide photographic material that can further shorten drying time while having sufficient film strength, thereby enabling rapid processing. The above objects of the present invention are achieved by a silver halide photographic material containing a polymer having a cloud point in at least one layer on a support. In other words, the drying time after development was reduced by including a polymer having a cloud point. The cloud point of the polymer is preferably about 80°C or lower, more preferably 20 to 80°C, particularly preferably 20 to 70°C.
゛C is desirable. Examples of the polymer having a clouding point used in the present invention include polyalkyl vinyl ether and polyethylene oxide, but a polymer having a repeating unit represented by the following general formula (■) is preferred. General formula (H In the formula, R+ represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, R and R3 each represent a hydrogen atom, and 1 to 1 carbon atoms.
O represents an alkyl group, aryl group, aralkyl group or alkoxy group, and R and R may be the same or different, provided that they cannot be hydrogen atoms at the same time,
Furthermore, R1 and R1 may combine to form a nitrogen-containing heterocycle together with the nitrogen atom. Preferred examples of monomers constituting the repeating unit represented by general formula (1) are listed below. M-I CutCut CONHCJt-z-0 M-2CutCut -ClC0NHCJ t--CH2-CH C0NHCJs (blank below) 1 CH. CH1=C CONHCJs (blank below) M-12 CH3 Ht-c CONHCdb-n 3 CI. CH,,C C0NHCslb-r-0 -14 -15 CHllllC)1 C0N(CHICH□QC)Is) The repeating units represented by the above general formula (1) are of two or more types in order to function as a polymer. It may contain monomer units of. The polymer used in the present invention preferably contains 10% or more of the heptamer represented by the above general formula (1), and is, for example, a polymer represented by the general formula (n). X, 100 to 10 mol% A represents a copolymerizable monomer unit. In addition, as 8, two or more types of monomer units may be included. Also, A
When has a crosslinking group, so-called cloudy weather is less likely to occur, but in that case, the monomer (1) should be at least 50 mol%. Next, examples of preferred polymers in the present invention will be listed. (Hereinafter in the margin) CONHCJS C0NHC3Ht-, 1 P-20 (Hereinafter in the margin) The cloudiness of the above polymer was determined by measuring the temperature at which cloudiness occurred in a 10% by weight aqueous solution. In the present invention, the preferred molecular lft axis of the polymer is from 3.000 to 500,000. The amount of this polymer added can be arbitrarily selected, but it is preferably 5 to 50% by weight, particularly 10 to 30% by weight of the total binder. The polymer of the present invention can be used in all hydrophilic colloid layers of photographic materials, such as silver halide emulsion layers, interlayers, protective layers,
It can be used for antihalation layers, back coats, subbing layers, etc. In the present invention, it is advantageous to use gelatin as the hydrophilic colloid used together with the polymer, but gelatin derivatives, graft polymers of gelatin and other polymers, other proteins, sugar derivatives, cellulose derivatives, single Alternatively, hydrophilic colloids such as synthetic hydrophilic polymeric substances such as copolymers can also be used. Examples of gelatin include lime-processed gelatin, acid-processed gelatin, Bull, Soc, Sci, Phot, and Japan.
Enzyme-treated gelatin as described in +N1116, page 30 (1966) may be used, and gelatin hydrolysates and enzymatically decomposed products may also be used. Gelatin derivatives can be obtained by reacting gelatin with various compounds such as acid halides, acid anhydrides, isocyanates, bromoacetic acids, alkanesultones, vinyl sulfonamides, maleimide compounds, polyalkylene oxides, and epoxy compounds. The one obtained by doing so is used. Specific examples thereof include, for example, U.S. Patent No. 2.614,92.
No. 8, No. 3,132, 945, No. 3,186.8
No. 46, No. 3.312,553, British Patent No. 861
．． No. 414, No. 1,033,189, No. 1.00
No. 5,784, Japanese Patent Publication No. 42-26845, etc. Examples of proteins include albumin, casein, etc.; examples of cellulose derivatives include droxyethyl cellulose, carboxymethyl cellulose, cellulose sulfate, and 11! Preferred derivatives include sodium alginate and starch derivatives. Examples of graft polymers of gelatin and other polymers include gelatin and derivatives such as acrylic acid, methacrylic acid, their esters and amides, and single (homo) or copolymers of vinyl monomers such as acrylonitrile and styrene. In particular, polymers having some degree of compatibility with gelatin, such as acrylic acid, acrylamide, methacrylamide, etc., can be used.
Graft polymers with polymers such as hydroquine alkyl methacrylate are preferred; examples of these are described in U.S. Pat. Are listed. Typical synthetic hydrophilic polymer substances include polyvinyl alcohol, polyvinyl alcohol partial acetal, and poly(IJ-)
l-vinylpyrrolidone, polyacrylic acid, polymethacrylic acid, polyacrylamide, polyvinylimidazole,
Single or copolymers such as polyvinyl pyrazole, etc., for example, West German Patent Application (OLS) 2,312,708
No. 3,620,751, U.S. Patent No. 3. Porridge, 2
No. 05, as described in Japanese Patent Publication No. 43-7561. Note that the content of these polymers is preferably lower than that of the polymer of the present invention. Next, grains used in the light-sensitive silver halide emulsion layer of the photographic material of the present invention will be described. The particle size distribution of the particles used may be monodisperse, where monodisperse means a dispersion in which 95% of the particles fall within ±60%, preferably within 40%, of the number average particle size. It is. Further, the number average grain size is the number average diameter of the projected area diameter of silver halide grains. Alternatively, the emulsion may be made of an emulsion in which ultratabular silver halide grains having a grain diameter of 5 times or more the grain thickness occupy 50% or more of the total projected area. For details, see JP-A-58-12
It is described in Publication No. 7921, Publication No. 58-113927, etc. It is preferable that at least 80% of the silver halide grains contained in the photosensitive silver halide emulsion layer in the present invention have a regular structure or shape in terms of weight or number of silver halide grains. Here, the term "silver halide grains with a regular structure or morphology" means grains that grow isotropically without including anisotropic growth such as twin planes, such as cubic, tetradecahedral, regular octahedral, It has a shape such as a facepiece or a sphere. The method for producing such regular silver halide grains is described, for example, in the Journal of
Photographic Science (J, Photo, Sc
i, ), 5.332 (1961), Ber, Bunsen
ges, Phys, Chew,) 67,
949 (1963), International Congress of Photographic Science of Tokyo.
Set, Tokyo (1967)). In the production of monodispersed emulsions and/or emulsions having regular silver halide grains, Japanese Patent Publications No. 4836890, Japanese Patent Publication No. 52-16364, and Japanese Unexamined Patent Application Publication No. 1983-142 are recommended.
The method described in Japanese Patent No. 329 can be preferably used. In the practice of the present invention, the silver halide grains used in the photosensitive silver halide emulsion layer are, for example, T. The Theory of the Photographic Process, by James H.
the Photo-graphic Process
), 4th edition, published by Macmillan (1977)
, P, GIfkides, ξ−・ENG・FISHIK・
Photographic (Chimie et Physi
quePhotograph+que <PauI M
onte1, 1967), G, F, Duffin
Author, Photographic Emulsion Chemistry, (Photographic EmulsionCh
e+m1stry) (The Focal Press
(Pub., 1966), V.L. Making and Coating Photographic Emulsions by Zelikmanetal
Kingand Coating Photograp
hic [! mulsion), (The Focal
It can be manufactured by applying the method described in literature such as (Published by Press, 1964). When forming silver halide grains, ammonia, for example, is used as a silver halide solvent to control grain growth.
Rhodankali, Rhodanammon, thioether compounds (e.g. U.S. Pat. No. 3,271.157, U.S. Pat. No. 3,574)
, No. 628, No. 3.704, 130, No. 4.29
7,439, 4,276, 374, etc.), thione compounds (e.g., JP-A-53-144319, JP-A-53-144319, JP-A-53-144319, JP-A-53-144319, JP-A-53-144319, etc.)
No. 82408, No. 55-77737, etc.), amine compounds (for example, JP-A-54-100717, etc.), etc. Among them, ammonia is preferable. Two or more types of silver halide emulsions formed separately can be used. These silver halide grains or silver halide emulsions may contain iridium, thallium, palladium, rhodium,
It is preferable that at least one salt (soluble salt) of zinc, nickel, cobalt, uranium, thorium, strontium, tungsten, and platena is contained, and the content thereof is preferably 10-'' per mol PA. ~10
− 'Mole. Particularly preferably, at least one of thallium, palladium, and iridium salts is contained. These may be used alone or in combination, and the addition position (time) is arbitrary. This improves flash exposure characteristics,
It is expected to have effects such as prevention of pressure desensitization, prevention of latent image regression, and sensitization. In the practice of the present invention, at least 98 g of a mother liquor containing protective colloid is used during particle growth prior to chemical sensitization as described above.
An embodiment in which the is 10.5 or more can be preferably adopted. Particularly preferably, an atmosphere with a very high bromine ion excess of 11.5 or more is passed through at least once. In this way, the number of (111) planes can be increased and the particles can be rounded. The (111) plane of such particles preferably accounts for 5% or more of the total surface area. In this case, the increase rate of the (111) plane (the increase rate with respect to that before passing through the above pAg atmosphere of 10.5 or more)
is preferably 10% or more, more preferably 10 to 20%. The outer surface of the silver halide grain is the (111) plane or the (10
0) How to measure whether one side is covered or the ratio thereof is reported by Akira Hirata,
Bulletin of the Society of Scientific Photography of Japan 8111
3.5-15 (1963). In this case, the timing for setting the above 9Ag is approximately 2 of the total amount of added silver.
It is desirable to do this after the addition of No. 73 is completed and before the desalting step, since it is easy to obtain a monodisperse emulsion with a narrow particle size distribution. In addition, aging in an atmosphere where pAg is 10.5 or more is 2
It is preferable to do this for at least 1 minute. A preferred embodiment of the present invention is a silver halide photographic emulsion layer in which the photosensitive silver halide emulsion layer consists essentially of silver iodobromide and contains silver halide grains having a multilayer structure, the silver halide emulsion layer containing silver halide grains having a multilayer structure, The difference in the average iodine content of any two adjacent layers (between the coating layers or between the inner core and the coating layer) each having a homogeneous iodine distribution of the particle is 10 mol% or more, and the average iodide content of the outermost layer is 10 mol% or more. There is an embodiment in which the silver content is 10 mol % or less and the silver halide grains are a chemically sensitized silver halide emulsion layer. Here, a particle having a multilayer structure has a coating layer made of an arbitrary halogen m* provided on the outside of the inner core, and this coating layer may be only one layer, or may have two or more layers, for example, three layers.
N may be laminated with 4 layers, preferably 5 or less layers. As the silver halide for the inner core and the coating layer, silver bromide, silver iodobromide, and silver iodide are used, but a mixture with a small amount of silver chloride may be used. Specifically, silver chloride may be contained in an amount of about 100 mol% or less, preferably about 5 mol% or less. Further, the outermost layer is substantially silver bromide or substantially silver iodobromide (iodine content: 10 mol % or less), and may contain less than several mol % of chlorine atoms. For example, in X-ray photosensitive materials, silver iodide may increase problems such as inhibition of development and infectious development, so it is practically preferable to keep the content of silver iodide below a certain level. The silver iodide content is preferably 10 mol% or less in the entire grain,
It is more preferably 7 mol% or less, and most preferably 0.1 to 3 mol%. When the internal core is made of silver iodobromide, it is preferably a homogeneous solid solution phase. Here, homogeneous can be more specifically explained as follows. That is, when performing X-ray diffraction analysis of silver halide grain powder, the surface index of silver iodobromide (
The half width Δ2・θ of the peak of 200) is 0.03 (deg
) means the following. The conditions for using the diffractometer at this time are to set the scanning speed of the goniometer to ω.
(deg/5in), the time constant is T (see), and the receiving slit width is r (va), then ωγ/r
≦10. As for the halogen composition of the internal core, the average iodine content is preferably 40 mol% or less, more preferably 0 to 40% by mole.
It is 20 mol%. The difference in silver iodide content between two adjacent layers (any two coating layers or coating layer and inner core) is preferably 10 mol% or more, more preferably 20 mol% or more, and particularly preferably is 25 mol% or more. In addition, the silver iodide content of the coating layer other than the surface coating layer is as follows:
Preferably it is 10-100 mol%. When a silver halide grain consists of three or more layers and the coating layer consists of silver iodobromide, it is not necessary that all of them be homogeneous, but it is possible that all the layers are made of homogeneous silver iodobromide. preferable. In the case of a negative-working silver halide emulsion, such a coating layer (or inner core) with a high silver iodide content is preferably present below the outermost surface, and in the case of a positive-working silver halide emulsion layer, it is preferable to exist below the outermost surface. It may be inside or on the surface. The silver iodide content of the tatami surface coating layer is preferably 10 mol% or less, more preferably 0 to 5 mol%. Here, regarding the silver iodide content of the inner core of the silver halide grains and the coating layer used in the photosensitive silver halide emulsion layer of the present invention, for example, J.
dstein), D.B. Williams (WNla+
as) rTEM/AT[+H X-ray analysis” Scanning Electron Microscopy (19
77), Volume 1 (I IT Research Institute), Page 651 (March 1977). When the silver halide grains in the photosensitive silver halide emulsion layer of the present invention are composed of two layers, for example, it is preferable that the inner core has a higher iodine content than the outermost layer, and when it has three layers, the inner core preferably has a higher iodine content than the outermost layer. It is preferable that the coating layer other than the surface layer or the inner core has a higher iodine content than the outermost layer. The silver halide grains in the photosensitive silver halide emulsion layer of the present invention may be of positive type or negative type. For chemical sensitization, for example H.
ie Grundlagen der Photogr
aphischenProzesse wit Sil
berhalogeniden), Akadimish Verlagesellschaft (Akade++isch)
eVeragasel 1schaft) 1968
The method described in 1996, pp. 675-734 can be used. Further, a spectral sensitizing dye may be added at any time from the time of silver halide grain formation to the time of chemical ripening or coating. The spectral sensitizing dye is preferably added from the time when the final volume of the silver halide grains reaches 60 to 100% during the formation of the silver halide grains to the time when the formation of the silver halide grains is completed. Specific examples of spectral sensitizing dyes include bag graphide (
"Chimie Photographigue J" by P. Glafkides
) J (2nd edition, 1957: Paul MontelParis), chapters 35-41 and Hay 7-(P, M, Hamer), The
Cyanine and Related Compounds (The
Cyanine and Re1ated Comp
oundS)J(Interscience<Interac
ence)>, and U.S. Patent No. 2,503,776
No. 3,459.553, No. 3.177, 21
No. 0, Research Disclosure
Disclosure) Volume 176 19643 (19
(Issued in December 1978) Section 23 (■), Section 1, etc. Sensitizing dyes may be used alone or in combination. When a sensitizing dye is used in the present invention, it can be used at the same concentration as used in a normal negative-working silver halide emulsion. In particular, it is advantageous to use the dye at a concentration that does not substantially reduce the inherent sensitivity of the silver halide emulsion. Approximately 1.0X10-L of sensitizing dye per mole of halogenated Sl
5. OxlO-' moles, especially about 4.0 moles of sensitizing dye per mole of silver halide. It is preferable to use a concentration of OXl0-' to 2, OXl0-' molar. 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,
Aminostilbene compounds substituted with nitrogen-containing heterocyclic groups (
For example, U.S. Patent Nos. 2'933,390 and 3,63
5.721), aromatic organic acid formaldehyde condensates (such as those described in US Pat. No. 3,743,510), cadmium salts, azaindene compounds, and the like. In addition to the above-mentioned additives, the silver halide photographic light-sensitive material of the present invention contains matting agents, stabilizers, development accelerators, hardeners, surfactants, anti-staining agents, lubricants, ultraviolet absorbers, and formalin skeletal agents. Various additives useful for photographic light-sensitive materials such as jars, color couplers, antistatic agents, and others can be used. In the photographic light-sensitive material of the present invention, the photographic emulsion layer and other layers can be embodied by being coated on one or both sides of a flexible support commonly used in photographic light-sensitive materials. Supports include paper coated with α-olefin polymers (e.g., polyethylene, polypropylene, ethylene/butene copolymers), flexible reflective supports such as synthetic paper, cellulose acetate, cellulose nitrate, polystyrene, polyester, etc. Examples include films made of semi-synthetic or synthetic polymers such as vinyl chloride, polyethylene terephthalate, polycarbonate, and polyamide, flexible supports in which these films are provided with reflective layers, glass, metals, and ceramics. The support may be colored using dyes or pigments. The surface of these supports is generally treated with an undercoat to improve adhesion to 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. For more information, please see Research Disclosure (
Research Disclosure), No. 176
Those described in the section of R5upports J, Vol. 25, page 25 are used. Examples of silver halide photographic materials to which the present invention is applied include black-and-white sensitive materials for photography, black-and-white sensitive materials for X-rays, black-and-white sensitive materials for printing, color reversal films, color negative films, color positive films, etc. Examples include multilayer color photosensitive materials. For the development process of the photosensitive material of the present invention, for example, a Research Disclosure (Research Disclosure) is used.
ure) No. 176, pp. 25-30 (RD-IT,
Various methods and processing solutions can be used, such as those described in 643). This development process may be either a photographic process for forming a silver image (black and white photographic process) or a photographic process for forming a dye image (color photographic process), depending on the purpose. The processing temperature is usually chosen between 18°C and 50°C,
The temperature may be lower than ts'c or higher than 50'C. Processing temperature and time are interrelated and determined in relation to the total processing time. In the present invention, the heating time is preferably 10 to 20 seconds at 30 to 40°C. Further, various other developing methods (for example, 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 the developing agent, dihydroxybenzenes (e.g. hydroquinone), 3-pyrazolidone 11 (e.g. 1-phenyl-3-pyrazolidone), aminophenols (e.g. N-methyl-p-aminophenol), etc. are used alone or in combination. Developer solutions generally contain various preservatives, alkaline agents,
) Contains buffering agents, anti-fogging agents, etc., and may further contain solubilizing agents, color toning agents, development accelerators, surfactants, antifoaming agents, water softeners, hardening agents, viscosity imparting agents, etc. good. As a special form of development processing, the developing agent is added to the photosensitive material.
For example, a method may be used in which the photosensitive material is included in the emulsion layer and the photosensitive material is processed in an alkaline aqueous solution to perform development. Among the developing agents, hydrophobic ones are described in Research Disclosure No. 169 (RD-16928) and U.S. Patent Nos. 2 and 7.
39,890, British Patent No. 813,253, or West German Patent No. 1,547.763. Such development treatment may be combined with silver salt stabilization treatment with thiocyanate. Color developers generally consist of an alkaline aqueous solution containing a color developing agent. Color developing agents include various primary aromatic amine developers, such as phenylene diamines (e.g. 4-
Amino-N, N-diethylaniline, 3-methyl-4-
AξNo N, N-diethylaniline, 4-amino-N-
Ethyl-N-β-hydroxyethylaniline, 3-methyl-4-amino-N-ethyl-N-β-hydroxyethylaniline, 3-methyl-4-amino-N-ethyl-N-
β-methanesulfamide ethylaniline, 4-amino-3
-methyl-N-ethyl-N-〇-methoxy, I delaniline, etc.) can be used. In addition, F.A. Mason, Photographic Processing Chemistry 4 (Photograph
hic Processing Chemistry)
, Focal Press, 1966 p226
~229, U.S. Patent No. 2,193.015, U.S. Patent No. 2,
592.364, JP-A No. 48-64933, etc. may be used. Color developers may also contain pH buffering agents such as alkali metal sulfites, carbonates, borates, and phosphates, development inhibitors or antifoggants such as bromides, iodides, and organic anti-capri agents. can be included. In addition, if necessary, water softeners, preservatives such as hydroxyamine, organic solvents such as benzyl alcohol and diethylene glycol, development accelerators such as polyethylene glycol, quaternary ammonium salts, agones, and pigments may be added. It may also contain a forming coupler, an auxiliary developer such as l-phenyl-3-pyrazolidone, a tackifying agent, a polycarboxylic acid chelating agent, an antioxidant, and the like. After color development, the photographic emulsion layer is usually bleached. The bleaching process may be performed simultaneously with the fixing process, or may be performed separately. Examples of bleaching agents include iron (■) and cobalt (III).
, chromium (IV), and polyvalent metal compounds such as w4 (II), peracids, quinones, nitroso compounds, etc. are used. For example, ferricyanide, dichromate, iron ([1
) or Kobal) (III), such as aminopolycarboxylic acids such as ethylenediaminetetraacetic acid, nitrilotriacetic acid, 13-diamino-2-propatoltetraacetic acid, or citric acid, tartaric acid 1. Complex salts of organic acids such as malic acid, persulfates, permanganates, nitrosophenols, etc. can be used. Of these, potassium ferricyanide, sodium iron(III) ethylenediaminetetraacetate, and ammonium iron(I[l) ethylenediaminetetraacetate are particularly useful. Iron (I) ethylenediaminetetraacetate
[I) tW salts are useful both in stand-alone bleach solutions and in -bath bleach-fix solutions. As the fixer, one having a commonly used composition can be used. As the fixing agent, in addition to thiosulfates and thiocyanates, organic sulfur compounds known to be effective as fixing agents can be used. The fixing solution may contain a water f4 liquid aluminum salt as a hardening agent. In the present invention, the developed and fixed photographic material is washed with water and dried. Washing with water is carried out to almost completely remove the silver salt dissolved during fixing, and is preferably carried out at about 20 to 50°C for 5 to 12 seconds, for example. Drying must be carried out at a temperature higher than the drying point, in order to achieve the effects of the present invention. Note that, considering the amount of heat of evaporation of water, drying is preferably carried out at a temperature of about 40°C or higher. For example, drying air volume 6-14 m'/win, heater capacity 12.0-4
．． 0KW (200V) It is enough to obtain enough dryness. (Example) Hereinafter, the present invention will be specifically explained using the following example.
The present invention is not limited to these. Example-1 4-hydroxy-6-methyl-1,3,3a,7-titrazyden and 2,4-dichloro-6-hydroxy-S- were added to a silver iodobromide gelatin emulsion containing 3 mol% silver iodide. ) After addition of riazine, the silver content will be 50 mg/d- on the subbed polyethylene terephthalate support! Coated, and further as a protective layer, polymethyl methacrylate particles (particle size 0.5 um) 50mp, 7m", CIIF+ffSOJa5
tg/m" gelatin 1.og/m" was laminated and used as a reference sample. Samples E1 to E4 and comparative sample A ((-CH2CH
CON11□ (polymer having + repeating unit) and comparative sample B (polymer latex having + CHICI+ repeating unit 0OCJs) were obtained. Note that the reference sample is EO. After each of the above samples was exposed to UV light and subjected to the development treatment shown below, it was dried at the temperature shown in Table 1, and the effects on weight change (dryness), scratch strength, devitrification, and photographic performance before and after the development treatment were evaluated. The results are shown in Table 1. (Processing process) Process Temperature (“C”) Time (seconds) Development
30 45 Fixed 2
5 35Water wash 15
35 drying 20 [
Developer & Precepts] Phenidone 0.4g Metol
5 g Hydroquinone 1 g Anhydrous sodium sulfite 60 g Sodium carbonate, H, Os4 g 5-nitroimidazole 100 mg Potassium bromide 2.58 Add water to make 1N, pH
Adjusted to 10,20. However, the dryness (weight change), scratch strength,
The devitrification property and sensitivity are as follows. [Dryness] (Weight change) Weight W before development of a sample with a width of 35 mm and a length of 10100 O+
+gW! After drying, measure the weight Wzg and dry at 100X-. I checked the degree. [Scratch strength] After developing, fixing, and rinsing in the above processing steps, the film surface is scratched with a weighted metal needle (φ: 0.5 mil) while immersed in the rinsing water. Strength) was investigated. (Devitrification property) A: No reduction in transparency after development B: Slightly milky white C: Slightly milky white A, B, and C were visually judged. Note that the devitrification property represents the compatibility of the polymer with gelatin. [Sensitivity] Measured using a sensitometer model KS-1 manufactured by Konica Corporation. Fogging +0.
The reciprocal of the number of exposures given at the density of 7 is the sensitivity, and the reference sample E
It is expressed as a specific sensitivity with the sensitivity of O as 100. Procedural amendment October 22, 1990

Claims (1)

[Claims] A silver halide photographic material, characterized in that at least one layer on a support contains a polymer having a cloud point.