JPH0510660B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a silver halide photographic light-sensitive material (hereinafter referred to as a light-sensitive material) that is spectrally sensitized with at least two types of sensitizing dyes that mutually exhibit supersensitizing effects.
In particular, it relates to a photographic material having a silver halide photographic emulsion layer with enhanced spectral sensitivity in the green sensitive region. [Prior Art] As is well known, when a sensitizing dye is added to a silver halide emulsion, the wavelength range to which the silver halide emulsion is sensitive is expanded and the emulsion is optically sensitized. When spectrally sensitizing a silver halide emulsion, it is known that when a certain sensitizing dye is used in combination with one or more sensitizing dyes, the efficiency of spectral sensitization increases significantly and high sensitivity can be obtained. The effect is called supersensitization. Various combinations of sensitizing dyes have been proposed for the purpose of supersensitization.
However, it is also known that the sensitizing dyes used in combination are required to be extremely selective with respect to each other, and that it is extremely difficult to predict the effects of the sensitizing dyes from their chemical structures. On the other hand, if two or more types of sensitizing dyes are used in combination to perform supersensitization, the spectral sensitivity in a specific spectral sensitization wavelength range may decrease, fog may increase, and exposure during or after the production of the light-sensitive material may result. Deterioration of stability over time such as decreased sensitivity and increased fog during storage (hereinafter referred to as raw storage), and deterioration of stability of latent images after exposure (photography) until development often occur. Achieving the purpose of supersensitization using a combination of sensitizing dyes that do not have such adverse effects is one of the important issues in the technology of producing light-sensitive materials. [Object of the Invention] An object of the present invention is to provide a photosensitive material which is supersensitized by a novel combination of two different dyes, has high sensitivity, and does not cause fogging. Another object of the present invention is to provide a photographic material having a spectrally sensitized silver halide emulsion layer that does not cause a decrease in sensitivity or an increase in fog during raw storage of the photographic material, particularly during raw storage under high temperature and high humidity conditions. It is about providing. [Summary of the Invention] As a result of various studies, the present inventors have found that the above object is achieved by providing a light-sensitive material having at least one silver halide emulsion layer on a support, in which the silver halide emulsion layer has the following properties. This can be achieved by a photosensitive material containing at least one sensitizing dye represented by the general formula () and at least one sensitizing dye represented by the following general formula (). This discovery led to the present invention. General formula () General formula () In the general formula (), R4 represents a hydrogen atom, an alkyl group or an aryl group, and R5 and R6
each represents an alkyl group, W1, W2, W3
and W4 are hydrogen atom, alkyl group, halogen atom, alkoxy group, aryl group, carboxyl group, alkoxycarbonyl group, aryloxycarbonyl group, nitro group, hydroxy group, cyano group, amino group, acylamino group, sulfonylamino group, respectively. It represents an acyloxy group, a carbamoyl group, a sulfamoyl group, a sulfonyl group, an acyl group, or a heterocyclic group, and W1 and W2, W2 and W3, and/or W3 and W4 may be linked to each other to form a ring. D2 represents an atomic group necessary to form an oxazole ring, _X2 represents an anion, and m represents 1 or 2. However, when the sensitizing dye represented by the above general formula () forms an inner salt, m represents 1. In the general formula (), R7 represents a hydrogen atom, an alkyl group or an aryl group, and R8 and R9
each represents an alkyl group, and Z1, Z2, Z3 and Z4 each represent a hydrogen atom, an alkyl group, a halogen atom, an alkoxy group, an aryl group, a carboxyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a nitro group, a hydroxy group, a cyano group, and group, amino group, acylamino group, sulfonylamino group, acyloxy group, carbamoyl group, sulfamoyl group, sulfonyl group, acyl group or heterocyclic group, and
Alternatively, Z3 and Z4 may be linked to each other to form a ring. Y1, Y2, Y3 and Y4 are each a hydrogen atom, an alkyl group, a halogen atom, an alkoxy group,
Aryl group, carboxyl group, alkoxycarbonyl group, aryloxycarbonyl group, nitro group, hydroxy group, cyano group, amino group, acylamino group, sulfonylamino group, acyloxy group, carbamoyl group, sulfamoyl group, sulfonyl group, acyl group or hetero represents a ring group,
Y1 and Y2, Y2 and Y3, and/or Y3 and Y4 may be linked to each other to form a ring. X ₃ represents an anion, and n represents 1 or 2. However, when the sensitizing dye represented by the general formula () forms an inner salt, n represents 1. Note that the alkyl group in general formulas () and () preferably has 1 to 6 carbon atoms. [Structure of the Invention] The present invention will be explained in more detail. First, the above general formula () will be further explained. R4 in the formula is preferably an alkyl group or an aryl group, and specific examples of the alkyl group include a methyl group, an ethyl group, a propyl group, a butyl group, a benzyl group, and a phenethyl group. Alkyl groups having a number of 1 to 6 are preferred. In addition, as the aryl group, phenyl group,
Examples include p-tolyl group. R5 and R6 each represent an alkyl group, and include alkyl groups commonly used in cyanine dyes. Specifically, for example, in addition to alkyl groups without substituents (methyl group, ethyl group, butyl group, etc.), hydroxyalkyl groups (2-hydroxyethyl group, 4-hydroxybutyl group, etc.), acetoxyalkyl groups (2-hydroxyethyl group, 4-hydroxybutyl group, etc.), -acetoxyethyl group, 3-acetoxypropyl group, etc.), alkoxyalkyl group (2-methoxyethyl group, 2-ethoxyethyl group, etc.), carboxyalkyl group (2-carboxyethyl group, 3-carboxypropyl group, p-carboxy benzyl, etc.), carbamoyl alkyl groups (carbamoylmethyl group, carbamoylethyl group, etc.),
Sulfoalkyl group (2-sulfoethyl group, 3-sulfopropyl group, 3-sulfobutyl group, 4-sulfobutyl group, 2-hydroxy-3-sulfopropyl group, p-sulfobenzyl group, etc.), aralkyl group (benzyl group, phenylethyl group) sulfamoyl alkyl group (sulfamoylethyl group, etc.). Details of the groups or atoms represented by W1, W2, W3 and W4 are as follows. The alkyl group preferably has 1 to 6 carbon atoms, and may be linear, branched, or cyclic, and may be saturated or unsaturated. Moreover, it may have a substituent. Specific examples of this alkyl group include methyl group, ethyl group, isopropyl group, cyclohexyl group, allyl group, trifluoromethyl group, hydroxyethyl group, acetoxymethyl group, carboxymethyl group, carboxyethyl group, and ethoxycarbonylmethyl group. etc. can be mentioned. The alkoxy group preferably has 1 to 6 carbon atoms, and may have a substituent. Specific examples of alkoxy groups include methoxy group, iso-
Examples include propoxy group and chloroethoxy group. Examples of the aryl group include phenyl group, naphthyl group, p-tolyl group, etc.; examples of the alkoxycarbonyl group include ethoxycarbonyl group, butoxycarbonyl group; examples of the aryloxycarbonyl group include phenoxycarbonyl group, etc. There are base and etc. Halogen atoms include fluorine, chlorine, bromine,
There is an atom of iodine. Examples of the amino group include an amino group, an alkylamino group, an arylamino group, a di-substituted amino group, and specific examples include a methylamino group, a diethylamino group, an anilino group, and the like. Examples of the acylamino group include an acetamido group and a benzamide group. Examples of the sulfonylamino group include an alkylsulfonylamino group and an arylsulfonylamino group, and specific examples include a methanesulfonamide group and a benzenesulfonamide group. Examples of the acyloxy group include an acetoxy group and a benzoyloxy group. Examples of the carbamoyl group include a carbamoyl group, an alkylcarbamoyl group, an arylcarbamoyl group, a di-substituted carbamoyl group, and specific examples include a methylcarbamoyl group and a phenylcarbamoyl group. Examples of the sulfamoyl group include a sulfamoyl group, an alkylsulfamoyl group, an arylsulfamoyl group, and a di-substituted sulfamoyl group.
Specific examples include ethylsulfamoyl group, dimethylsulfamoyl group, phenylsulfamoyl group, and the like. Examples of sulfonyl groups include alkylsulfonyl groups, arylsulfonyl groups, heterocyclic sulfonyl groups, and specific examples include methanesulfonyl groups, cyclohexanesulfonyl groups, benzenesulfonyl groups, p-toluenesulfonyl groups, pyridinesulfonyl groups, and 1-piperidine. Examples include a sulfonyl group and an N-morpholinosulfonyl group. Examples of the acyl group include an acetyl group, a benzoyl group, a 1-piperidinocarbonyl group, and an N-morpholinocarbonyl group. Examples of the heterocyclic group include a benzoxazolyl group, a benzothiazolyl group, a piperidino group, a morpholino group, a succinimide group, a furyl group, and a thienyl group. W1 and W2, W2 and W3, and/or W3 and W4 may be linked to each other to form a ring, but examples of the ring that can be formed include a ring formed together with a benzene ring substituted by W1 to W4, for example. Examples include a naphthalene ring, a quinoline ring, a benzothiophenone ring, an isobenzofuran ring, an indole ring, a chroman ring, and a tetrahydroquinoline ring. In addition, these rings have further substituents such as alkyl groups, halogen atoms, aryl groups, carboxy groups,
Substituted with groups such as alkoxycarbonyl group, alkoxy group, nitro group, hydroxy group, cyano group, amino group, acylamino group, sulfonylamino group, acyloxy group, carbamoyl group, sulfamoyl group, sulfonyl group, acyl group, heterocyclic group, etc. may have been done. The ring represented by D2 may have a substituent, but
Specific examples of this substituent include an alkyl group, a halogen atom, an aryl group, a carboxy group, an alkoxycarbonyl group, an alkoxy group, a nitro group, a hydroxy group, a cyano group, an amino group, an acylamino group, a sulfonylamino group, an acyloxy group, Carbamoyl group, sulfamoyl group, sulfonyl group,
Examples include acyl groups and heterocyclic groups. Examples of the heterocyclic nucleus containing an oxazole ring represented by D2 are oxazole, 4-methyloxazole, 5-methyloxazole, 4-phenyloxazole, 4,5-dimethyloxazole, 5
-phenyloxazole, 4,5-diphenyloxazole, and the like. The _anion represented by , methyl sulfate ion, ethyl sulfate ion, etc. m represents 1 or 2, and when the sensitizing dye represented by the above general formula () forms an inner salt, m
represents 1. Next, general formula () will be further explained. R7 in the general formula () represents a hydrogen atom, an alkyl group, or an aryl group, and examples of the alkyl group and aryl group include those mentioned above for R4. R8 and R9 each represent an alkyl group,
It has the same meaning as R5 and R6 above. The explanation and specific examples of the groups or atoms represented by Y1 to Y4 and Z1 to Z4 are the same as the explanation and specific examples of W1 to W4 above. Also, Y1chi
Y2, Y2 and Y3 and/or Y3 and Y4, and
The explanation and specific examples of the rings that can be formed by Z1 and Z2, Z2 and Z3, and/or Z3 and Z4 are also the same as the explanation and specific examples for W1 to W4. The anion represented by X ₃ is an anion commonly used in cyanine dyes, and examples thereof include the same specific examples as those listed for X ₂ above. n represents 1 or 2, and n represents 1 when the sensitizing dye represented by the general formula () forms an inner salt. Typical examples of sensitizing dyes used in the present invention are listed below, but the sensitizing dyes used in the present invention are not limited thereto. The sensitizing dyes represented by the above general formulas () and () were synthesized with reference to "The Cyanine Soy and Related Compound" by F.M. Harmer (Interscience Publishers, New York, 1964). can do. The trimethine cyanine sensitizing dye according to the present invention represented by the above general formula () or general formula () has a content of 5 x 10 -7 mol to 5 x 10 ^-7 mol, respectively, per 1 mol of silver halide used in the silver halide emulsion. 5×
It is used in a proportion of 10 ^-3 mol, preferably 1 x 10 ^-6 mol to 2.5 x ^{10 -3} mol, particularly preferably 5 x 10 ^-6 mol to 1 x 10 ^-3 mol. The molar ratio of the dye of general formula () to the dye of general formula () is preferably 1:20 to 20:1. When adding the above-mentioned sensitizing dye to the silver halide emulsion, the dye may be directly dispersed in the above-mentioned emulsion, or it may be dissolved in an appropriate solvent such as methanol, ethanol, dimethylformamide, etc. alone or in combination. It may be added to the emulsion after that. Although it can be added at any time during the manufacturing process of the light-sensitive material, it is generally preferable to add it to the silver halide emulsion during the second ripening or immediately after the second ripening. The trimethine cyanine sensitizing dye according to the present invention is a combination of one or more dyes of general formula () and one or more dyes of general formula (),
It can be used in combination with other cyanine dyes, styryl dyes, etc. for supersensitization of spectral sensitization. The silver halide emulsion used in the present invention is usually prepared by mixing a water-soluble silver salt (for example, silver nitrate) solution and a water-soluble halide salt (for example, potassium bromide) solution in the presence of a water-soluble polymer solution such as gelatin. able to make. As the silver halide, any silver halide used in ordinary light-sensitive materials such as silver chloride, silver bromide, silver iodide, silver chlorobromide, silver iodobromide, silver chloroiodobromide, etc. can be used. I can do it. These silver halide emulsions are prepared according to known and conventional methods (for example, single or double jet method, controlled double jet method, etc.). Furthermore, two or more types of silver halide emulsions formed separately may be mixed. Furthermore, even if the crystal structure of silver halide grains is uniform inside, there are also grains with a layered structure with different interior and exterior layers, so-called conversion emulsions, Lippmann emulsions, covered grain emulsions, or grains that have been optically processed in advance. Alternatively, it may be chemically fogged.
Further, either a type in which a latent image is mainly formed on the surface or an internal latent image type in which a latent image is formed inside the particle may be used. These silver halide emulsions can be prepared by various generally accepted methods such as an ammonia method, a neutral method, and an acid method. Further, the type of silver halide, content and mixing ratio of silver halide, average grain size, size distribution, etc. are appropriately selected depending on the type of silver halide emulsion and the intended use. These methods are described in Chimie et al. by P. Glafkides.
Physique Photographique (published by Paul Montel)
1967), Photographic Emulsion by GFDuffin
Chemistry (The Focal Press, 1966), VL
Making and Coating by Zelikman et al
Photographic Emulsion (published by The Focal Press)
1964). To prepare the light-sensitive material of the present invention, silver halide is dispersed in a suitable protective colloid and coated on a suitable support to form a silver halide emulsion layer. The protective colloid used in the layer structure of the photosensitive layer and other auxiliary layers such as intermediate layer, protective layer, filter layer, etc. is generally alkali-treated gelatin, and other examples include acid-treated gelatin, derivative gelatin, colloidal albumin, and cellulose. There are derivatives and synthetic resins such as polyvinyl alcohol and polyvinylpyrrolidone, which can be used alone or in combination. The above silver halide emulsion can be sensitized with a chemical sensitizer. Chemical sensitizers include noble metal sensitizers (potassium aurithiocyanate, ammonium chloroparadate, potassium chloroplatinate, etc.), sulfur sensitizers (allylthiocarbide, thiourea, cystine, etc.), selenium sensitizers (active and They are roughly divided into four types: inert selenium compounds, etc.) and reduction sensitizers (stannic salts, polyamines, etc.). Silver halide emulsions can be chemically sensitized using these sensitizers alone or in combination as appropriate. These chemical sensitization methods are described, for example, in U.S. Patent No.
No. 1574944, No. 1623499, No. 2410689, No. 1574944, No. 1623499, No. 2410689, No.
No. 2448060, No. 2399083, No. 2642361, No.
No. 2487850, No. 2518698, No. 1623499, No. 2487850, No. 2518698, No. 1623499, No.
It is described in No. 1602592, etc. Further, polyalkylene oxide compounds and the like can also be used as other sensitizers. Furthermore, various other additives can be added to the silver halide emulsion. For example, aldehydes such as formaldehyde, halogen-substituted fatty acids such as mucobromic acid, hardening agents such as epoxy compounds, active halogen compounds, active vinyl compounds, ethyleneimine compounds, saponins, nonionic surfactants, cationic surfactants, etc. surfactants such as surfactants, anionic surfactants, amphoteric surfactants, azoles, heterocyclic mercapto compounds such as 1-phenyl-5-mercaptotetrazole, 4-hydroxy-6-methyl-1,3,3a,7 - azaindenes such as tetrazaindene, antifoggants or stabilizers such as benzenethiosulfonic acid and benzenesulfinic acid, physical property improvers such as glycerin polymer aqueous dispersion (latex), 5-pyrazolone magenta couplers, Dye image-forming couplers and colored couplers such as acylacetanilide yellow couplers or phenol and naphthol cyan couplers, competing couplers for improving image sharpness and graininess or adjusting gradation, and development inhibitor-releasing couplers. couplers such as (DIR coupler), dibutyl phthalate, triphenyl phosphate, tricresyl phosphate, N,N-diethyl laurylamide,
Dispersants used as coupler solvents such as ethyl acetate, butyl acetate, chloroform, methanol, etc., ultraviolet absorbers such as benzotriazoles, triazines, benzophenone compounds, etc., nuclear-substituted hydroquinones, p-alkoxyphenols, 6 - Anti-staining agents and anti-browning agents such as chromanols, 6,6'-dihydroxy-2,2'-spirochromans and their alkoxy derivatives, brighteners such as stilbene-based, triazine-based, oxazole-based or Kliman-based, etc. Various photographic additives may be added. The silver halide emulsion according to the present invention has good flatness and is coated on a support that exhibits good dimensional stability and little dimensional change during the manufacturing process or processing. Examples of the support in this case include cellulose nitrate film, cellulose ester film,
Polyvinyl acetal film, polystyrene film, polyethylene terephthalate film,
polycarbonate film, glass, paper, metal,
Paper coated with polyolefin, such as polyethylene, polypropylene, etc., can be used. These supports can be subjected to various surface treatments such as hydrophilic treatment for the purpose of improving adhesion with the silver halide emulsion layer, such as saponification treatment, corona discharge treatment, subbing treatment, and setting treatment. Processing such as the following is performed. The light-sensitive material of the present invention basically consists of a support and a light-sensitive emulsion layer, but depending on the type of light-sensitive material, it may include a subbing layer, an intermediate layer, a filter layer, an antihalation layer, an anticurl layer, Auxiliary layers such as a back layer and a protective layer may be appropriately combined and overlaid. The present invention can also be applied to multilayer color light-sensitive materials in which at least two light-sensitive emulsion layers having different spectral sensitivities are coated on a support. The above-mentioned multilayer color photosensitive material is usually provided with:
The structure includes at least one red-sensitive emulsion layer, one green-sensitive emulsion layer, and one blue-sensitive emulsion layer each in order from the support side, but the order of these layers can be arbitrarily selected as necessary. Usually, the red-sensitive emulsion layer contains a cyan coupler, the green-sensitive emulsion layer contains a magenta coupler, and the blue-sensitive emulsion layer contains a yellow coupler, but in some cases a combination different from the above may be included. may be done. The silver halide photographic emulsion of the present invention may contain a water-soluble dye as a filter dye or for various purposes such as preventing irradiation.
Such dyes include oxonol dyes, hemioxonol dyes, styryl dyes, merocyanine dyes, cyanine dyes and azo dyes. Among them, oxonol dyes, hemioxonol dyes and merocyanine dyes are useful. Exposure to obtain a photographic image may be carried out using a conventional method. That is, any of the various known light sources can be used, such as natural light (sunlight), tungsten electric lamps, fluorescent lamps, mercury lamps, xenon arc lamps, carbon arc lamps, xenon flash lamps, and cathode ray tube flying spots. Exposure times range from 1/1000 seconds to 1 second, which is normally used with cameras, as well as exposure times shorter than 1/1000 seconds, such as 1/1 x 10 4 to 1/1 x 10 ⁴ using xenon flash lamps or cathode ray tubes.
An exposure of 1/1 x 10 ⁶ seconds can also be used,
Exposures longer than 1 second can also be used. If necessary, the spectral composition of the light used for exposure can be adjusted using a color filter. Laser light can also be used for exposure, and electron beams, X-rays, γ-rays,
Exposure may be performed by light emitted from a phosphor excited by alpha rays or the like. The photosensitive material of the present invention can be used, for example, in Research Disclosure, No. 176, pages 20 to 30 (RD-
17643) using a known treatment method and treatment solution. The photographic processing method may be a black and white photographic process to obtain a silver image or a color photographic process to obtain a dye image. The processing temperature applied in photographic processing is usually between 18°C and 50°C, but temperatures below 18°C can also exceed 50°C.
Processing is possible even at temperatures exceeding .degree. The developer used in black-and-white photographic processing can contain conventionally known developing agents. Examples of developing agents include dihydroxybenzenes (e.g. hydroquinone), 3-pyrazolidones (e.g. 1-phenyl-3-pyrazolidone), aminophenols (e.g. N-methyl-p-aminophenol), 1-phenyl-3-pyrazoline. kind,
Ascorbins and heterocyclic compounds such as those described in US Pat. No. 4,067,872 in which a 1,2,3,4-tetrahydroquinoline ring and an indolene ring are condensed can be used alone or in combination. The developing solution also contains known preservatives, alkaline agents, PH buffering agents, antifoggants, etc., as well as solubilizing agents, color toning agents, development accelerators, surfactants, antifoaming agents, hard water, etc. It may also contain a softening agent, a hardening agent, a viscosity imparting agent, and the like. A so-called "lith type" development process can be applied to the photosensitive material of the present invention. "Lith-type" development processing is a development process in which dihydroxybenzenes are usually used as a developing agent and a low sulfite ion concentration is used for the photographic reproduction of line images or the halftone dot photographic reproduction of halftone images. Refers to a developing process that is carried out in a contagious manner (details are described in "Photographic Processing Chemistry" by Mason (1966!, pages 163-165). The fixing solution has a commonly used composition. 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 contains water-soluble aluminum as a hardening agent. It may contain salt. When forming a dye image, a conventional method can be applied. Negative-positive method (for example, “Journal of the Society
of Motion Picture and Television
61 (1953), pp. 667-701), developed in a developer containing a black and white developing agent to produce a negative silver image, followed by at least one uniform exposure or other A color reversal method in which a dye-positive image is obtained by performing appropriate fogging treatment and subsequent color development; a photographic emulsion layer containing a dye is exposed and developed to create a silver image, and this is used as a bleaching catalyst to bleach the dye. A silver dye bleaching method is used.The color developer generally consists of an alkaline aqueous solution containing a color developing agent.The color developing agent is a known primary aromatic amine developer, such as phenylene diamines (e.g. 4-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-hydroxyethylaniline, 3-methyl-4-amino-N-ethyl-N-β-methanesulfamide ethylaniline,
4-amino-33-methyl-N-ethyl-N-β-
methoxyethylaniline, etc.) can be used. Other Photography by LFAMason
Processing Chemistry (Focal Press, 1966)
pages 226-229, U.S. Patent No. 2193015, U.S. Patent No. 2592364
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 antifoggants. can. If necessary, hardening softeners, preservatives such as hydroxylamine, organic solvents such as benzyl alcohol and diethylene glycol, development accelerators such as polyethylene glycol, quaternary ammonium salts, and amines, dye-forming couplers, competitive couplers, Fogging agents such as sodium polyhydride, auxiliary developers such as 1-phenyl-3-pyrazolidone, viscosity-imparting agents, U.S. Pat.
The polycarboxylic acid chelating agent described in No. 4083723,
It may also contain antioxidants such as those described in OLS 2622950. The emulsion layer after color development is usually bleached.
The bleaching process may be performed simultaneously with the fixing process, or may be performed separately. As bleaching agents, compounds of polyvalent metals such as iron (), cobalt (), chromium (), copper (), peracids, quinones, nitroso compounds, etc. are used. For example, ferrician compounds, dichromates, organic complex salts of iron () or cobalt (), aminopolycarboxylic acids such as ethylenediaminetetraacetic acid, nitrilotriacetic acid, 1,3-diamino-2-propanoltetraacetic acid, or citric acid, Complex salts of organic acids such as tartaric acid and malic acid; persulfates, permanganates; nitrosophenols, and the like can be used. Of these, potassium ferricyanide, sodium ferric ethylenediaminetetraacetate, and ammonium ferric ethylenediaminetetraacetate are particularly useful. Ethylenediaminetetraacetic acid iron() complexes are useful in stand-alone bleaches, single-bath bleaches, and single-bath bleach-fixes. Bleach or bleach-fix solutions are manufactured by U.S. Patent No.
No. 3042520, No. 3241966, Special Publication No. 45-8506, No. 3042520, No. 3241966,
Bleach accelerator described in No. 45-8836, etc., JP-A-1983-
In addition to the thiol compound described in No. 65732, various additives can also be added. For the purpose of increasing sensitivity, increasing contrast, or accelerating development, the silver halide emulsion according to the present invention may contain, for example, polyalkylene oxide or its derivatives such as ethers, esters, and amines, thioether compounds, thiomorpholinic acids, quaternary ammonium salt compounds, Urethane derivatives, urea derivatives,
It may also contain imidazole derivatives, 3-pyrazolidones, and the like. For example, U.S. Patent No. 2400532;
No. 2423549, No. 2716062, No. 3617280, No.
Those described in No. 3772021, No. 3808003, British Patent No. 1488991, etc. can be used. The combination of trimethine cyanine sensitizing dyes according to the present invention has the above-mentioned excellent properties, and it is possible to obtain a light-sensitive material having a green-sensitive silver halide emulsion layer with high sensitivity and good shelf life. Therefore, it is not only useful as an excellent green-sensitizing sensitizing dye for color photosensitive materials, but also for various photosensitive materials such as black and white photosensitive materials, various photosensitive materials for plate making,
Furthermore, it can also be applied to color photosensitive materials containing colored dyes produced by a silver dye bleaching method. [Examples] Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto. Example 1 Silver halide grains were precipitated by a double jet method, physically ripened and desalted by a conventional method, and further chemically ripened by a gold sensitization method and a sulfur sensitization method to obtain 7 mol% silver iodide. A silver iodobromide emulsion containing . The average diameter of the silver halide grains contained in this emulsion was 0.6 μm. 0.68 mol of silver halide and 88.0 g of gelatin binder are contained in 1 kg of this emulsion. 1 kg of this emulsion was weighed into a pot and heated to 40°C to dissolve it. Then, predetermined amounts of methanol solutions of the sensitizing dye according to the present invention and the comparative sensitizing dye were added and mixed and stirred. Furthermore, 4-hydroxy-6-methyl-1,3,
1.0% by weight aqueous solution of 3a,7-tetrazaindene
Then, 10 ml of a 1% by weight aqueous solution of 1-hydroxy-3,5-dichlorotriazine sodium salt was added, followed by 10 ml of a 1.0% by weight aqueous solution of dodecylbenzenesulfonic acid sodium salt, and the mixture was stirred.
This completed emulsion was coated on a cellulose triacetate film base to a dry film thickness of 5 μm and dried to obtain a photosensitive material sample. This sample was cut into strips. One was a light wedge exposure using a sensitometer with a light source with a color temperature of 5400 and a yellow filter attached to the light source. After exposure, develop at 20℃ using a developer with the following composition.
After developing for a minute, stopping, fixing, washing with water and drying, a strip with a prescribed black and white image was obtained. The density of each processed sample was measured using an optical densitometer to measure sensitivity and fog. The optical density reference point for determining sensitivity was the fog +0.20 point. Developer composition Metol 2g Anhydrous sodium sulfite 40g Hydroquinone 4g Sodium carbonate monohydrate 28g Potassium bromide 1g Add water to make 1. The results obtained are shown in Table 1. Note that the sensitivity is a relative value with the sensitivity of test No. 1 being 100.

【table】

【table】

As is clear from Table 1, the supersensitization effect of the dye combination of the present invention is superior to that of known dye combinations, and it can be seen that supersensitization can be achieved while suppressing the occurrence of fog. Example 2 A silver iodobromide emulsion containing 7 mol% of silver iodide was chemically ripened by a conventional method to obtain an average grain size of 1.0μ.
An emulsion with a silver content of 0.60 mol/Kg and a gelatin content of 70 g/Kg was obtained. 1 kg of this emulsion was heated to 40°C, and 500 g of an emulsion of magenta coupler D shown below was added.
The emulsion of coupler D was obtained by adding 300 ml of ethyl acetate and 100 ml of dibutyl phthalate to 100 g of the coupler D, dissolving it, adding sodium dodecylbenzenesulfonate, and emulsifying and dispersing it in 1 kg of 10% gelatin aqueous solution using a homogenizer. was used. To this emulsion were added predetermined amounts of methanol solutions of the sensitizing dye according to the present invention and the comparative sensitizing dye, and the mixture was mixed and stirred. Furthermore, 4-hydroxy-6-methyl-1,3,
1.0% by weight aqueous solution of 3a,7-tetrazaindene
Add 20 ml of a 1% by weight aqueous solution of 1-hydroxy-3,5-dichlorotriazine sodium salt.
was added, and further 10 ml of a 1.0% by weight aqueous solution of sodium dodecylbenzenesulfonic acid was added and stirred. This completed emulsion was coated on a cellulose triacetate film base at a coated silver amount of 5 g/m ² and dried to obtain a sample. This film sample was subjected to light wedge exposure using a sensitometer with a light source with a color temperature of 5400 and a green filter attached to the light source. After exposure, development was carried out according to the following formulation, bleached, fixed, and dried, and the density of the developed magenta color image was measured. The optical density reference point for determining sensitivity was the fog +0.20 point. Immediately after coating, the sensitivity of the sample obtained by color development processing is defined as S ₀ , and after coating it is
The sensitivity of the sample obtained after one week of raw storage and treatment was defined as _S1 . Table 2 shows the values of S ₁ /S ₀ ×100 (%). Development processing recipe 1 Color development 3 minutes 15 seconds (38℃) 2 Bleaching 6 minutes 30 seconds 3 Washing 3 minutes 15 seconds 4 Fixing 6 minutes 30 seconds 5 Washing 3 minutes 15 seconds 6 Stability 3 minutes 15 seconds Processing used in each step The liquid composition is as follows. Color developer [Sodium nitrilotriacetate 1.0g Sodium sulfite 4.0g Sodium carbonate 30.0g Potassium bromide 1.4g Hydroxyamine sulfate 2.4g 4-(N-ethyl-N-β-hydroxyethylamino)-2-methylaniline sulfate Add 4.5g of salt and water to make 1. Bleach solution Ammonium bromide 160.0g Ammonia water (28%) 25.0ml Ethylenediamine-tetraacetic acid sodium iron salt
130.0g Glacial acetic acid 14.0ml Add water to make 1. Fixer Sodium tetrapolyphosphate 2.0g Sodium sulfite 4.0g Ammonium thiosulfate (70%) 175.0ml Sodium bisulfite 4.6g Add water to make 1. Stabilizing liquid formalin 8ml Add water to make 1.

[Table] As is clear from Table 2, the dye combination of the present invention shows less decrease in sensitivity after storage of raw samples than known dye combinations, that is, it has excellent raw storage stability.

Claims (1)

[Scope of Claims] 1. A silver halide photographic material having at least one silver halide emulsion layer on a support, in which the silver halide emulsion layer contains a sensitizing dye represented by the following general formula (). at least one species of
and a silver halide photographic material containing at least one sensitizing dye represented by the following general formula (). General formula () General formula () In the general formula (), R4 represents a hydrogen atom, an alkyl group or an aryl group, and R5 and R6
each represents an alkyl group, W1, W2, W3
and W4 are hydrogen atom, alkyl group, halogen atom, alkoxy group, aryl group, carboxyl group, alkoxycarbonyl group, aryloxycarbonyl group, nitro group, hydroxy group, cyano group, amino group, acylamino group, sulfonylamino group, respectively. It represents an acyloxy group, a carbamoyl group, a sulfamoyl group, a sulfonyl group, an acyl group, or a heterocyclic group, and W1 and W2, W2 and W3, and/or W3 and W4 may be linked to each other to form a ring. D2 represents an atomic group necessary to form an oxazole ring, _X2 represents an anion, and m represents 1 or 2. However, when the sensitizing dye represented by the above general formula () forms an inner salt, m represents 1. In the general formula (), R7 represents a hydrogen atom, an alkyl group or an aryl group, and R8 and R9
each represents an alkyl group, and Z1, Z2, Z3 and Z4 each represent a hydrogen atom, an alkyl group, a halogen atom, an alkoxy group, an aryl group, a carboxyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a nitro group, a hydroxy group, a cyano group, and represents an amino group, an acylamino group, a sulfonylamino group, an acyloxy group, a carbamoyl group, a sulfamoyl group, a sulfonyl group, an acyl group, or a heterocyclic group, and Z1 and Z2, Z2 and Z3, and/or Z3 and Z4 are linked to each other. may be used to form a ring. Y1, Y2, Y3 and Y4 are hydrogen atoms, respectively
Alkyl group, halogen atom, alkoxy group, aryl group, carboxyl group, alkoxycarbonyl group, aryloxycarbonyl group, nitro group, hydroxy group, cyano group, amino group, acylamino group, sulfonylamino group, acyloxy group, carbamoyl group, sulfamoyl group group, sulfonyl group,
represents an acyl group or a heterocyclic group, Y1 and Y2,
Y2 and Y3 and/or Y3 and Y4 may be linked to each other to form a ring. X ₃ represents an anion, and n represents 1 or 2. However, when the sensitizing dye represented by the general formula () forms an inner salt, n represents 1.