JPH0268543A - Silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To obtain the silver halide photographic sensitive material which allows shortening of the drying time with the sufficient film strength by incorporating a polymer having a cloud point into at least one layer on a base. CONSTITUTION:The polymer having the cloud point is exemplified by the polymer having the repeating unit expressed by the formula I. In the formula, R1 denotes a hydrogen atom or 1 to 6C alkyl group; R2, R3 respectively denote a hydrogen atom, 1 to 10C alkyl group, aryl group, or aralkyl group. R2 and R3 may be the same or different but there is no case in which both are simultaneously the hydrogen atom. R2 and R3 may bond to form a nitrogenous heterocycle together with a nitrogen atom. The preferable R2 and R3 thereof are the alkyl group of R2+R3>=3C. The more preferable example of the monomer constituting the repeating unit expressed by the formula I is the formula II.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a photographic material that has improved rapid processing properties without any loss in photographic properties.

[Background of the Invention] In general, hydrophilic colloid films used for producing photographic 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 1L silver halide layer, intermediate layer, or protective layer on a support, it is conventional to use water-soluble polymers or polymers in which various monomers are polymerized in the hydrophilic colloid layer. Various attempts have been made to incorporate latex to improve the physical properties of the hydrophilic colloid film 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 is also described in US Pat.
The use of vinyl acetate polymer latex in US Pat. No. 3,325,286
In Japanese Patent Publication No. 45-5331, a polymer latex of n-butyl acrylate, ethyl acrylate, styrene, butadiene, vinyl acetate, acriminitrile, etc. is used. , special public official 1977
-22506 discloses that a polymer latex of alkyl acrylate, acrylic acid, and sulfoalkyl acrylate is used.
In the above publication, it is disclosed that a polymer latex of 2-acrylamido-2-methylpropanesulfonic acid is used.

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 shortening of the drying time is possible without 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 81 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.

[Structure of the Invention] An object of the present invention is to provide a silver halide photographic material that has sufficient film strength and can further shorten drying time, thereby enabling rapid processing.

The above objects of the present invention are achieved by a silver halide photographic material containing a polymer having dots in at least one layer on a support.

That is, a reduction in the drying time after development was achieved by including a polymer having a landing point.

The temperature at which the polymer attaches is about 80°C or less, more preferably 20 to 80°C, particularly preferably 20 to 7°C.
The temperature is preferably 0°C.

Examples of the polymer having a landing point used in the present invention include polyargyl vinyl ether and polyethylene oxide, but a polymer having a repeating unit represented by the following general formula (1) is preferable.

General formula ([) In the formula, R1 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, Rt and th are a hydrogen atom and 1-1 carbon atoms, respectively.
o represents an alkyl group, aryl group, or aralkyl group, and R and P may be the same or different, provided that they cannot be hydrogen atoms at the same time, and R1 and P,
may combine with the nitrogen atom to form a nitrogen-containing heterocycle.

Among the above, preferable R1 and Rq are R, +R, and an alkyl group having 3 or more carbon atoms.

Preferred examples of monomers constituting the repeating unit represented by general formula (1) are listed below.

M I C11g-Cll CONHCJt-t-- M 2 C1h-C1l CONHCJff-.

The polymer in the present invention preferably contains 10% or more of the monomer represented by the above general formula (1), and is, for example, a polymer represented by the - binding margin (■).

p.

X: 100 to 10 mol% A represents a copolymerizable monomer unit. In addition, as 8, it may contain two or more types of monomer units, and
When A has a bridge of 1M, so-called cloudy weather is less likely to occur, but in that case, the monomer N) should be at least 50 mol %.

Next, examples of preferred polymers in the present invention will be listed.

The repeating unit represented by the above general formula (1) may contain two or more types of monomer units in order to function as a polymer.

In addition, the cloudy weather of the above polymer is 10! Itlft% water t8
? The temperature at which clouding occurred was measured at I(E).

In the present invention, the preferred molecule ff1M of the above polymer
w is from 3,000 to 500,000.

The amount of this polymer added can be arbitrarily selected, but preferably 5 to 5% of the total binder,
In particular, 10 to 30% by weight is desirable.

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, bank coat layers, subbing layers, etc.

In the present invention, it is advantageous to use gelatin as the hydrophilic colloid used together with the above polymer, but gelatin derivatives, graft polymers of gelatin and other polymers, other proteins, #11 derivatives, cellulose derivatives, monomers, etc. Hydrophilic colloids such as synthetic hydrophilic polymeric materials such as mono- or copolymers may also be used.

Examples of gelatin include lime-treated gelatin, acid gelatin, [1u11. Soc, Sci, Photo, Japan
Enzyme-treated gelatin as described in +k16, p. 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.

Preferred proteins include albumin and casein; preferred cellulose derivatives include hydroxyethyl cellulose, carboxymethyl cellulose, and cellulose sulfate; and preferred sugar derivatives include sodium alginate and 'R$51 derivatives.

The graft polymer of gelatin and other polymers includes 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. A grafted material can be used. Particularly preferred are graft polymers of gelatin with polymers which are compatible to some extent, such as acrylic acid, acrylamide, methacrylamide, hydroxyalkyl methacrylates, examples of which are described in U.S. Pat.
．． No. 763.625, No. 2.831.767, No. 2.956,884, etc.

Typical synthetic hydrophilic polymer substances include polyvinyl alcohol, polyvinyl alcohol partial acetal, and poly-N-
Single or copolymers of vinylpyrrolidone, polyacrylic acid, polymethacrylic acid, polyacrylamide, polyvinylimidazole, polyvinylpyrazole, etc.
For example, West German Patent Application (OLS) No. 2,312,708, U.S. Patent No. 3,620,751, U.S. Patent No. 3,879,
No. 205 and 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, it may be made of an emulsion in which supertabular silver halide grains with a grain diameter of five times or more of the grain thickness occupy 50% or more of the total projected area.
It is described in Publication No. 7921, Publication No. 58-113927, etc.

It is preferable that the silver halide grains contained in the photosensitive silver halide emulsion layer in the present invention have at least 80% of the silver halide grains by weight or number of grains having a regular structure or shape.

Here, the term "silver halide grains with a uniform structure or morphology" means grains that grow isotropically without including anisotropic growth such as twin planes, such as cubic, tetradecahedral, and regular octahedral grains. Face piece! It has a shape such as dihedral or Lg type. A method for producing such regular silver halide grains is described, for example, in the Journal of Photography, Inc.
, Sci, ), 5.332 (1961), Ber, Bun
Senges, Phys, Chem,) 67, 94
9 (1963), International, Congress Photo, S.
ci, Tokyo (1967)).

In producing monodispersed emulsions and/or emulsions having regular silver halide grains, Japanese Patent Publications No. 4836890, Japanese Patent Publication No. 5246364, and Japanese Unexamined Patent Publication No. 1423/1983 are recommended.
The method described in Japanese Patent No. 29 can be preferably used.

In the practice of this invention, the silver halide grains used in the light-sensitive halide 8 anti-emulsion layer are, for example, T.

The Theory off the Photographic Process, by James H.
the Photo-graph Process
), 4th edition, published by Macmillan (1977)
, P. Glfkldes, Chim[e et I'hy Photographic]
slquePhotographyae (Paul
Mante 1, 1967), G, P, Duff
Photographic Emulsion Chemistry, by ln
onCheristry) (The Focal Pr.
ess, 1966), V.L.

Making and Coating Photographic Ink Emulsion by Zeliksanetal
Kingand Coating Photograp
hic [! mulsion), (The Focal
It can be manufactured by applying the method described in literature such as (Published by Press, 1964).

During the formation of silver halide grains, ammonia, rhodanpotash, rhodanammonium, thioether compounds (e.g., U.S. Pat. Nos. 3,271,157 and 3,5
No. 74.628, No. 3.704,130, No. 4.
No. 297,439, No. 4, 276, 374';
j, etc.), 1,000-ion compounds (e.g., JP-A-53444319)
No. 53-82408, No. 55-77737, etc.)
, amine compounds (for example, JP-A-54-100717, etc.) can be used. Among them, ammonia is preferred.

Two or more types of silver halide emulsions formed separately may be mixed and used.

In addition, these silver halide grains or silver halide emulsions contain iridium, thallium, palladium, rhodium,
It is preferable that at least one salt (soluble salt) of zinc, nickel, cobalt, uranium, thorium, strontium, tungsten, and platinum is contained. Its content is preferably 10-'-10 per mol PAg.
−'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 progression, and sensitization.

In practicing the present invention, at least during particle growth prior to chemical aggravation as described above, the ρA of the mother liquor containing protective colloid,
Mr. B whose is 1000 or more can be preferably employed. 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 (III) plane of such particles preferably has an interest rate of 5% or more with respect to its total surface area.

In this case, the increase rate of the 010 plane (the above 1000 or more p
The rate of increase relative to that before passing through the Hg atmosphere) is
It 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) Regarding whether either side is covered or how to measure the ratio, please refer to the complaint by Ma Hiratam.
Bulletin Off the Society Off Scientific Photography Off Japan Nα13
．． 5-15 (1963).

In this case, it is desirable that the above p/Ig be set after the addition of the total amount of about 273 particles, and before the desalination step.This is because the particle size distribution is narrow! This is because it is easy to obtain a μ-dispersed emulsion.

In addition, aging in an atmosphere with a pHg of 10.5 or higher is not recommended.
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 impregnation rate of any two adjacent layers (between the coating layers or between the inner core and the coating layer) having a homogeneous iodine distribution 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 is one in which a coating layer made of an arbitrary halogen composition is provided on the outside of the inner core, and this coating layer may be only one layer, or it may be 2N or more, for example, 3N or more.
It may be laminated with four layers, preferably 5N or less.

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.

In addition, the outermost layer is substantially silver bromide or actually iodobromide I.
m (iodine content of 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 (
200) peak half width Δ2θ is 0.03 (deg)
It means that: The conditions for using the diffractometer at this time are to set the scanning speed of the goniometer to ω(
deg/1lin), the time constant is T (sec), and the receiving slit 11 is r (11), ωy
/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 2N coating layer or coating layer and internal core) is preferably 10 mol% or more, more preferably 20 mol% or more, and particularly preferably is 25 mol% or more.

The silver iodide content of the coating layer other than the Jw layer is preferably 10-100 mol %.

When silver halide grains are composed of three or more layers and the coating layer is composed of silver iodobromide, it is not necessary that they all be homogeneous, but it is possible that all Jffi are homogeneous iodobromide. preferable.

In the case of a negative-working halide daughter emulsion, such mjlllW (or inner core) having a high silver iodide content is preferably present below the outermost surface. In the case of a positive silver halide emulsion layer, it may be present either inside or on the surface.

The silver iodide content of the layer surface coating y1 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 halide emulsion layer of the present invention, for example, J, 1. Goldstein (G
oldsLeln), D. B. Williams (111
11a+ws) 'X-ray analysis at T[+M/8↑', Scanning Electron Microscopy (1977), Vol. 1 (I IT Research Institute), p. 651 (March 1977) It can be determined by the method described.

When the silver halide grains in the photosensitive silver halide emulsion layer of the present invention are made of, for example, 2N, it is preferable that the inner core has a higher iodine content than the outermost layer, and when it is made of 3N, the inner core is preferably higher in iodine than the outermost layer. It is preferable that the IMI target layer or the internal 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, 11. Pr1eser Ii
Die Grundlagen der Fotogelafingien Prozesse Mituto Zilberhalogennieden (Die Grundlagen der Pl+oL
ographischenProzesse 1t 5
ilberhalo) Leniden), Akadimish Verlagese Jreschaft (Akademi)
scheVeragasellschafL) 1968
The method described in 1999, 675-734F [2006] 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 60 to 100% of the final volume of halide root grains is formed at the time of silver halide grain formation to the end of chemical ripening.

Specific examples of spectral sensitizing dyes include bag graphide (
Chi+mie PhoLographigu J (Chi+mie PhoLographigu
e) J (2nd edition, 1957: Bowl Montres
35th in Paris (Paul MontelParis)
Chapters ~ 41 and The Cyanine and Related Compounds by Hamer (P, M, lIa+*e)
The Cyanline and Re1ated C
ow+pounds)) (Interscience (Int
eraclence)), and U.S. Patent No. 2.503.
, No. 776, No. 3.459.553, No. 3.17
”l, No. 210, Research Disclosure (Res.
EARCH DI! closure) Volume 176 1964
3 (Published in December 1978) Section 23 (■), Section 3, 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 1.0% of sensitizing dye per mole of halogenated flft. Ox10
-' ~5. Ox to 'mol, especially silver halide 1
Approximately 4.0% of sensitizing dye per mole. OXl0-'~2, OXl0
-' molar concentrations are preferred.

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,
For example, the emulsion may contain a substance exhibiting supersensitization.
Aminostilbene compounds substituted with nitrogen-containing heterocyclic groups (
For example, U.S. Patent Nos. 2.933.390 and 3.63.
5,721), aromatic a-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 material of the present invention also contains matting agents, stabilizers, development accelerators, hardeners, surfactants, anti-staining agents, lubricants, ultraviolet absorbers, and formalin scavengers. -, color couplers, antistatic agents, and various other additives useful for photosensitive materials 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 an IQ-compatible support commonly used in photographic light-sensitive materials.

The support includes an IQ reflective support such as paper laminated with an α-olefin polymer (e.g. polyethylene, polypropylene, ethylene/butene copolymer), synthetic paper, etc.
Films made of semi-synthetic or synthetic polymers such as cellulose acetate, cellulose nitrate, polystyrene, polyvinyl chloride, polyethylene tereclate, polycarbonate, polyamide, flexible supports made of these films with reflective layers, glass, and metals. , ceramics, etc.

The support may be colored using dyes or pigments.

The surface of these supports is treated with an undercoat in order to improve adhesion to the photographic emulsion layer and the like. The surface of the support may be subjected to corona discharge, ultraviolet irradiation, flame treatment, etc. before and after the undercoating treatment.
(Research DISclosure), No. 17
The one described in section 4 of Volume 6, page 25 is used.

Silver halide photosensitive materials to which the present invention is applied include black-and-white photosensitive materials such as IQ shadow photosensitive materials, black-and-white photosensitive materials for X-rays, and monochrome photosensitive materials for printing, color reversal films, color negative films, and color positive films. Examples include multi-1t9 color photosensitive materials such as 1t9 color light-sensitive materials, etc.

For the development of the photosensitive material of the present invention, for example, a Research Disclosure (Research Disclosure) is used.
ure) No. 176, pp. 25-30 (RD-17, 6
The seeding method and treatment liquid as described in 43) can be used. This development process can be carried out depending on the purpose.
It may be either a photographic process that forms a silver image (black and white photographic process) or a photographic process that forms a dye image (color photographic process).

The processing temperature is usually chosen between 18°C and 50°C, but it may also be below 18°C or above 50''C.

The processing temperature and time are mutually related and determined in relation to the total processing time. In the present invention, they are preferably, for example, 30-40 DEG C. and 10-20 seconds.

In addition, other types of development methods (for example, thermal development) 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, dihydroxybenzene In (e.g. hydroquinone), 3-pyrazolidones (e.g. l-phenyl-3-pyrazolidone), aminophenols (e.g. N-methyl-ρ-aminophenol), etc. are used alone or in combination. be able to.

Developing solutions generally contain various preservatives, alkaline agents, and p.
If 171 contains buffering agents, anti-fogging agents, etc., and may also contain solubilizing agents, toning agents, development accelerators, surfactants, antifoaming agents, water softeners, hardening agents, viscosity imparting agents, etc. as necessary. good.

As a special form of development processing, the developing agent is added to the photosensitive material.
For example, hydrophobic developing agents that are contained in the emulsion layer and may be developed by processing the light-sensitive material in an alkaline aqueous solution are disclosed in Research Disclosure No. 169 (RD-16928), U.S. Patent Nos. 2 and 7
No. 39,890, British Patent No. 813.253, or West German Patent No. 1,547.7 (i3). , may be combined with silver salt stabilization treatment using thiocyanate.

The color developer is generally composed of an alkaline aqueous solution containing a color developing agent.
Amino-N, N-diethylaniline, 3-methyl-4-
Amino-N, N-diethylaniline, 4-amino-N-
Ethyl-N, β-hydroxyethylaniline, 3-methyl-4-amino-N-ethyl-N-β hydroxyedylaniline, 3-methyl-4-amino N-ethyl-N-β
Methanesulfamide ethylaniline, 4-amino-3-
methyl-N-ethyl-N-β-methoxyethylaniline, etc.) can be used.

In addition, F.A. Mason, Photographic Processing Chemistry
ic Processing Chemistry)
, Focal Press, 1966 p226~
229, U.S. Patent No. 2,193,015, U.S. Patent No. 2,5
92,364, 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 anticapri agents such as bromides, iodides, and organic antifoggants. can be included. In addition, if necessary, water softeners, preservatives such as hydroxyamine, and Rta such as benzyl alcohol and diethylene glycol may be added.
agent, polyethylene glycol, quaternary ammonium salt,
It may also contain a development accelerator such as amines, a dye-forming coupler, an auxiliary developer such as -phenyl-3-virapritone, a viscosity imparting 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 compounds of polyvalent metals such as iron (m), cobalt (■), chromium (IV), and copper (II);
Peracids, quinones, nitroso compounds, etc. are used.

For example, potassium ferricyanide, lj chromate, iron (I
[[) or organic 11 salts of cobalt (■1), such as aminopolycarboxylic acids such as ethylenediaminetetraacetic acid, 21-lilotriacetic acid, 13-diamino-2-propatoltetraacetic acid, or citric acid, tartaric acid, malic acid fff salts, persulfates, permanganates, nitrosophenols, etc. of organic acids such as the following can be used. Of these, potassium ferricyanide, sodium ferric ethylenediaminetetraacetate (fff), and ammonium ferric ethylenediaminetetraacetate (Iff) are particularly useful. ethylenediaminetetraacetic acid f
i(muff salts are useful in both stand-alone bleach solutions and -bath bleach-fix solutions.

As the fixer, one having the composition used in -a 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 fixer may contain an aqueous 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 is carried out at a temperature of about 40°C or higher, for example 40 to 100°C, preferably about 50°C or higher, and the drying time can be changed as appropriate depending on the surrounding conditions, but usually it is about 5 seconds to 25 seconds. For example, sufficient drying performance can be obtained with a drying air volume of 6 to 14 n'/...in and a heater capacity of 2.0 to 4.0 (200 V).

(Example) Hereinafter, the present invention will be specifically explained using the following example.
The present invention is not limited to these.

Example-1 After adding 4-hydroxy-6-methyl-1+3+3n+7-tetrazydene and 2,4-dichloro-6-hydroxy-5-triazine to a silver iodobromide gelatin emulsion containing 3 mol% silver iodide, It was coated on a subbed polyethylene terephthalate support to a concentration of 11 ff 150 mg/dm'', and as a protective layer, polymethyl methacrylate particles (particle size 0.5 μm) 50 mg/m'', C
ar 1.5OJa5g/s! Sample El-E4, comparative formula \IA ((-Cl1t
A polymer containing repeating units of CI++ was prepared.

Note that the reference sample is EO.

After exposing each of the above samples to wedge light and performing the development processing shown below, they were dried at the temperature shown in Table 1, and the fii
The results are shown in Table 1. The results are shown in Table 1.

[Processing process]

Process development fixing water landing washing drying [developer composition] Phenidone 0.4g methol
5g hydroquinone 1g anhydrous sodium sulfite 60 g sodium carbonate II*0 54 g5-nido-l-coimidazole too mg potassium bromide 2
．． Add 5g of water to bring the volume to 11 and adjust the pH to 2o.

However, the dryness (weight change), scratch strength,
The devitrification property and sensitivity are as follows.

[Dryness] (Weight change) 'II 35mm, length 1000mm trial t'+ development 11; 1 weight 1ftW+ gW! After drying, the dry weight Wt g was measured and the degree of dryness was examined at +00X-.

(Scratch strength) n: After developing, fixing, and washing in the processing step 1, the gold fitting (φ: 0.5
The minimum weight (scratching strength) at which scratches occur was determined by scratching the surface of the membrane using a scratch mill.

[devitrification]

8: No reduction in transparency after development B: Slightly milky white color C: (! Crab milky white color A, B, and C were visually judged. The devitrification property of the polymer Indicates gelatin compatibility.

[Sensitivity] Measured using a sensitometer model KS-1 manufactured by Konica Corporation. Fogging +0.
Sensitivity is the reciprocal of the exposure amount given at 4 degrees of 7, and is expressed as specific sensitivity, where the sensitivity of base sample U7.0 is 100.

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.