JPH0412459B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a silver halide photographic light-sensitive material (hereinafter simply referred to as a light-sensitive material) with improved tonality, and more particularly to a light-sensitive material with improved photographic performance over a wide exposure latitude. When performing imagewise exposure on a photosensitive material, it is necessary to form an imagewise image with appropriate shading on the negative of the photosensitive material even if there is overexposure or underexposure. Photosensitive materials with a wide latitude have been strongly desired. However, in reality, it has generally been a problem with light-sensitive materials that graininess and sharpness deteriorate as exposure increases. For example, in order to obtain a light-sensitive material with a wide exposure latitude, a method of constructing a light-sensitive material using a silver halide emulsion with a wide particle size distribution as a conventional technique;
Alternatively, a method of constructing a light-sensitive material using a silver iodobromide emulsion having a high iodine content, or a method of reducing the amount of silver halide in a silver halide emulsion used in a light-sensitive material has been proposed. However, in any of these techniques, there remains the problem that the graininess is greatly degraded and the photosensitivity of the photosensitive material is reduced. Furthermore, techniques have been provided that attempt to widen the exposure latitude of photosensitive materials without deteriorating graininess. For example, in color negative light-sensitive materials, there is a method of reducing the color density of an image by using a non-diffusible compound (DIR compound) that can react with the oxidized form of a developing agent to release a diffusive development-inhibiting compound, or a method of reducing the color density of an image. Methods have also been disclosed in which the color density of images is similarly lowered using couplers having the ,
This is a big downside in terms of resource conservation and cost. Furthermore, a method for constructing a light-sensitive material using a mixture of several types of silver halide emulsions having different average grain sizes has been disclosed, but the effect of improving exposure latitude was not sufficient. Furthermore, a technique has been disclosed in which the silver halide emulsion is an emulsion consisting of monodisperse silver halide grains, and a photographic material is constructed by using a mixture of several types of these emulsions. For example, JP-A-56
-78831 achieves a wide exposure latitude by using a mixture of several types of silver halide emulsions with almost the same grain size but with different iodine contents in the surface layer of monodisperse silver halide grains. . However, with this method, the effect of improving graininess was not large enough to satisfy. Therefore, a first object of the present invention is to provide a photosensitive material having a wide exposure latitude and excellent gradation. A second object of the present invention is to provide a photosensitive material having a wide exposure latitude and excellent particle size. The object is to provide a silver halide photographic material having on a support at least one silver halide emulsion layer containing at least two types of substantially monodisperse silver halide grains having different average grain sizes. The silver iodide content of each monodisperse silver halide grain contained in the silver halide emulsion layer is the smallest in the grain with the largest average grain size, and the average grain size is further reduced by 0.1μ. This is achieved by a silver halide photographic material characterized in that the ratio increases by 0.3 mol% or more in each case. Each silver halide contained in the photographic emulsion according to the present invention is preferably a grain consisting essentially of silver iodobromide, and the term "substantially" herein refers to grains containing components other than silver iodobromide, such as silver chloride. In the case of silver chloroiodobromide, if the content of silver chloride is up to about 5 mol% of the total silver halide, it can be considered to be ``substantially'' composed of silver iodobromide. can. In each of the above-mentioned silver halide grains according to the present invention, each silver iodide content is the smallest in the grain having the largest average grain size, and each time the average grain size decreases by 0.1μ. The ratio increases by 0.3 mol% or more, preferably 1.0 mol% or more. Specifically, when the mixture consists of two monodisperse silver iodobromide particles, one with a large diameter and one with a small diameter, the average grain size of which differs by 0.1μ or more, the silver iodobromide grains with the larger diameter The iodine content should be 0.3 mol% or more, preferably 1.0 mol% or more lower than that of small-diameter silver iodobromide grains. The light-sensitive material according to the present invention has at least one silver halide emulsion layer containing the above-mentioned substantially monodisperse silver halide grains. Substantially monodisperse silver halide grains herein refer to the standard deviation S of the particle size distribution of silver halide grains and the average grain size, which is defined by the following formula, dividing the standard deviation S by the average grain size r. It is preferable that the value is 0.20 or less. It is particularly preferable that S/r≦0.20 and further S/r≦0.15. The average grain size referred to here refers to the diameter in the case of spherical silver halide grains, or the average diameter when the projected image is converted into a circular image of the same area in the case of grains with shapes other than cubic or spherical. where the individual grain size is ri and the number is ni, r is defined by the following formula. =Σniri/Σni Each of the silver halide grains according to the present invention is
So-called core-shell type silver halide grains are preferable, and in this case, the surface layer (in the case of a double core-shell type having two or more shells, this means the outermost shell; the same applies hereinafter). so that the silver iodide content of the silver halide does not change substantially.
Preferably, each silver halide grain is constructed. Here, "substantially unchanged" means that the silver iodide content in the surface layer does not substantially change even if the average grain size changes. Specifically, it means that the silver iodide content in the surface layer between grains does not change substantially. It is preferred that the difference in silver iodide content does not exceed 0.5 mol%. Thereby, the object of the present invention can be achieved more effectively, and it is also possible to equalize the development activity and stabilize chemical ripening. When core-shell type silver halide grains are used in the present invention, the surface layer preferably constitutes 50% or less, particularly 20% or less of the total grain weight. In addition, the silver iodide content in the surface layer is 3 mol%.
The following silver iodobromide is preferred. The silver iodide content of the core (other than the surface layer, hereinafter the same) in the core-shell type is preferably silver halide containing 0 to 15 mol% of silver iodide. Further, the monodisperse silver halide of the present invention preferably has a hexahedral, octahedral, or dodecahedral crystal habit. The silver halide emulsion used in the monodisperse silver halide emulsion layer of the present invention has the smallest silver iodide content in the grains with the largest average grain size, and the average grain size is 0.1 μ smaller. It can be produced by mixing at least two types of monodisperse silver halides having different average grain sizes, each successively larger by 0.3 mol % or more, preferably 1.0 mol % or more. Such a silver halide emulsion before mixing can be prepared by a known or conventional method.
That is, silver halide particles may be generated and dispersed by adding an aqueous solution of a water-soluble silver salt, such as silver nitrate, and an alkali halide aqueous solution to a dispersion medium such as an aqueous gelatin solution. A method of adding an aqueous solution of a water-soluble silver salt to a mixture of a dispersion medium such as an aqueous gelatin solution and an aqueous solution of an alkali halide; A method of adding an aqueous solution, a method of simultaneously adding an aqueous silver salt solution and an aqueous alkali halide solution to a dispersion medium such as an aqueous gelatin solution,
Various methods can be applied. A highly monodisperse silver halide emulsion can also be produced by the method described in JP-A-54-48521, in which a potassium (iod)bromide-gelatin aqueous solution and an ammoniacal silver nitrate aqueous solution are mixed with a silver halide emulsion. It can be produced by adding particles into a gelatin solution containing the particles at varying rates of addition as a function of time. At this time, a highly monodisperse silver halide emulsion can be obtained by appropriately selecting the time function of the addition rate. Also useful in the present invention are core/shell emulsions made by the method disclosed in GB 1027146. Also useful are silver halide emulsions obtained by the convergence method disclosed in US Pat. No. 2,592,250 and British Patent No. 635,841. In the production of the various silver halide emulsions described above, at least two types of monodisperse silver halide grains having the silver iodide content and different average grain diameters according to the present invention can be produced. The monodisperse silver halide emulsion of the present invention can be produced by producing a silver halide emulsion containing the grains thus produced and mixing them in an appropriate ratio. The silver halide grains can be mixed at an appropriate time during the process of producing the light-sensitive material according to the present invention. That is, it may be carried out at any time during the production of silver halide grains, before chemical ripening, during chemical ripening, or before coating, but it is most preferable to carry out after chemical ripening. When producing the monodisperse silver halide emulsion according to the present invention, for example, when using monodisperse silver halide grains having two different average grain sizes, large diameter and small diameter, large diameter grain/small diameter grain In the weight ratio of
It is preferable to set it to 0.05-20, especially 0.1-5.0,
Further, the difference in particle size of each particle to be mixed may be such that the difference in particle size between the two types of particles can be identified as a difference in sensitivity, and it is preferable that ΔlogE is about 0.1 to 1.2, particularly about 0.2 to 0.6. Furthermore, silver iodobromide grains in which the average grain size of the mixed grain large diameter grains is 0.5 to 1.5μ and the average grain size of the small diameter grains is 0.1 to 1.0μ,
It is preferable to mix them after chemical ripening to produce the silver halide emulsion according to the present invention. In this case, it is preferable to use the above-mentioned core-shell type silver halide, and it is more preferable that the shell and core satisfy the above-mentioned preferable specific conditions of the present invention. The light-sensitive material according to the present invention only needs to have at least one monodisperse silver halide emulsion layer according to the present invention, and may have two or more layers. For example, in a color photosensitive material, all or some of the silver halide emulsion layers can be the monodisperse silver halide emulsion layer of the present invention. When the present invention is applied to a multilayer color photosensitive material, it can be applied to all or part of the emulsion layers of the red-sensitive, green-sensitive and blue-sensitive photosensitive layers constituting the material. The photosensitive layer herein refers to a layer or layer group consisting of at least one emulsion layer that is sensitive to light in the same wavelength range. For example, the green-sensitive photosensitive layer may be composed of a low-sensitivity green-sensitive emulsion layer and a high-sensitivity green-sensitive emulsion layer, and the present invention can be applied to both or either of these two emulsion layers. When applied to either one, it is preferable to apply it to the low-sensitivity photosensitive emulsion layer. The photosensitive material according to the present invention can be effectively applied to various uses such as black and white general use, X-ray use, color use, infrared use, micro use, silver dye bleaching method, reversal use, and diffusion transfer method use. can. The photosensitive material according to the present invention can have a non-photosensitive layer on the support. Conventionally known techniques can be applied as is to the non-photosensitive layer. Further, the silver halide photographic emulsion layer may also contain an emulsion layer other than the monodisperse silver halide photographic emulsion layer according to the present invention. For the photographic emulsions of these emulsion layers, the same techniques as described below for the silver halide photographic emulsions according to the present invention can be applied. The silver halide emulsions according to the invention can be chemically sensitized. They can be done by any conventional method. Namely, activated gelatin, water-soluble metals, noble metal sensitizers such as water-soluble platinum salts, water-soluble palladium salts, water-soluble rhodium salts, and water-soluble iridium salts; sulfur sensitizers; selenium sensitizers; polyamines, and stannous chloride. Chemical sensitization can be carried out using chemical sensitizers such as reduction sensitizers such as, alone or in combination. Furthermore, this silver halide can be optically sensitized to a desired wavelength range, such as xeromethine dyes, monomethine dyes, dimethine dyes,
Optical sensitization can be carried out using cyanine dyes such as trimethine dyes or optical sensitizers such as merocyanine white pigment alone or in combination (for example, ultra-white sensitization). Furthermore, the photosensitive material according to the present invention includes a photosensitive layer and/or other constituent layers (for example, an intermediate layer, a subbing layer,
(filter layer, protective layer, image-receiving layer, etc.) may contain various photographic additives depending on the purpose. For example, stabilizers and antifoggants such as azeindenes, triazoles, tetrazoles, imidazolium salts, tetrazolium salts, polyhydroxy compounds; aldehyde-based, aziridine-based, inoxazole-based, vinylsulfone-based, acryloyl-based,
Hardeners such as arpodiimide, maleimide, methanesulfonic acid ester, and triazine; Development accelerators such as benzyl alcohol and polyoxyethylene compounds; Chroman, Claman, bisphenol, and phosphite ester hardeners; Image stabilizer;
Lubricants include waxes, glycerides of higher fatty acids, and higher alcohol esters of higher fatty acids. In addition, anionic, cationic, and nonionic surfactants can be used as coating aids, emulsifiers, permeability improvers for processing solutions, antifoaming agents, and materials for controlling various physical properties of photosensitive materials. Alternatively, various species of both sexes can be used. As the mordant, N-guanylhydrazone compounds, quaternary onium salt compounds, etc. are effective. As the antistatic agent, diacetyl cellulose, styrene perfluoroalkyl rhidium maleate copolymer, alkali salt of a reaction product of styrene-maleic anhydride copolymer and p-aminobenzenesulfonic acid, etc. are effective. Examples of the color turbidity inhibitor include polymers containing vinylpyrrolidone monomers, polymers containing vinylimidazole monomers, and the like. Examples of matting agents include polymethyl methacrylate, polystyrene, and alkali-soluble polymers. It is also possible to use colloidal silicon oxide. Further, examples of the latex added to improve the physical properties of the film include copolymers of acrylic esters, vinyl esters, etc. and other monomers having ethylene groups. Examples of gelatin plasticizers include glycerin and glycol compounds, and examples of thickeners include styrene-sodium maleate copolymers, alkyl vinyl ether-maleic acid copolymers, and the like. Furthermore, in the case of color silver halide emulsions,
A coupler is included to form a color image. Useful couplers include open-chain methylene yellow couplers, pyrazolone magenta couplers, and phenolic or naphthol cyan couplers; these couplers can be combined with colored couplers for automasking (e.g., with a bonding group at the active site of the coupler). couplers with a split-off group having an azo group bonded to them) osazone-type compounds, development-diffusible dye-releasing couplers,
Development inhibitor-releasing compound (a compound that reacts with the oxidized form of an aromatic primary amine developing agent to release a development-inhibited compound; it reacts with the oxidized form of an aromatic primary amine developing agent to release a colored So-called white pigment forming
It is also possible to use DIR couplers (including both DIR couplers and so-called DIR substances that form colorless compounds). In order to incorporate these couplers into a silver halide color photographic light-sensitive material, various known techniques conventionally used for couplers can be applied. For example, the coupler and the high boiling point solvent can be dissolved and contained in a high boiling point solvent, or the coupler and the high boiling point solvent can be separately dispersed into fine particles and then mixed together. A preferable method is to use . A low boiling point solvent can be used in place of a high boiling point solvent, and can also be used in combination with a high boiling point solvent, and each of these solvents can be used alone or in combination of two or more. Alternatively, part or all of the high-boiling solvent that is immiscible with water may be replaced with a polymer that is insoluble in water and soluble in organic solvents. In the case of a coupler having a water-soluble group, it is also possible to use the Fischer type, ie, by dissolving it in an alkaline solution. The light-sensitive material according to the present invention is produced by coating a support with a silver halide emulsion layer and other constituent layers containing various photographic additives as described above as necessary. . Advantageously used supports include, for example, baryta paper, polyethylene-coated paper, polypropylene synthetic paper, glass paper, cellulose acetate, cellulose nitrate, polyvinyl acetal, polypropylene,
Examples include polyester films such as polyethylene terephthalate, polystyrene, and the like, and these supports are appropriately selected depending on the purpose of use of each silver halide photographic light-sensitive material. These supports are subjected to undercoat processing if necessary. After exposure, the light-sensitive material of the present invention can be developed by a commonly used known method. The black and white developer is an alkaline solution containing developing agents such as hydroxybenzenes, aminophenols, and aminobenzenes, and may also contain other alkali metal salts such as sulfites, carbonates, bisulfites, bromides, and iodides. I can do it. Further, in the case of a silver halide color photographic light-sensitive material, color development can be carried out by a commonly used color development method. In the reversal method, the image is first developed with a black-and-white negative developer, then exposed to white light or treated with a bath containing a fogging agent, and then color developed with an alkaline developer containing a color developing agent. There are no particular restrictions on the processing method, and any processing method can be applied, but typical examples include a method in which after color development, bleach-fixing is performed, and if necessary, further washing with water and stabilization treatment are performed, or after color development. Examples include methods in which bleaching and fixing are carried out separately, and further water washing and stabilization treatment are carried out as necessary.
It is also known to process low silver halide light-sensitive materials using amplifiers such as hydrogen peroxide and cobalt complex salts, and these methods can also be used for processing. In addition, these treatments may be carried out at high temperatures in order to perform them quickly, or may be carried out at room temperature or lower in special cases. Pre-hardening treatment can also be performed when performing high temperature rapid treatment. Furthermore, depending on the type of processing agent used, auxiliary baths such as various types of neutralization baths may be required, and these auxiliary baths can be used as necessary. Particularly useful color developing agents used for color development when the light-sensitive material of the present invention is applied to color are primary phenylenediamines and derivatives thereof, and the following are representative examples: be able to. 4-amino-N,N-diacylaniline, 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-
Methanesulfonamidoethylaniline, 3-methyl-4-amino-N-ethyl-N-β-methoxyethylaniline, 3-β-methanesulfonamidoethyl-4-amino-N,N-diethylaniline, 3-methoxy- 4-amino-N-ethyl-N
-β-hydroxyethylaniline, 3-methoxy-4-amino-N-ethyl-N-β-methoxyethylaniline, 3-acetamido-4-amino-
N,N-diethylaniline, 4-amino-N,N
-dimethylaniline, N-ethyl-N-β-[β
-(β-methoxyethoxy)ethoxy]ethyl-
3-methyl-4-aminoaniline, N-ethyl-
N-β(β-methoxyethoxy)ethyl-3-methyl-4-aminoaniline and salts thereof, such as sulfate, hydrochloride, sulfite, and p-toluenesulfonate. The light-sensitive material having a monodisperse silver halide emulsion layer according to the present invention has a wide latitude and a high Has sensitivity. In addition to the advantages of wide latitude and high sensitivity, it also has the advantages of excellent graininess and gradation. Therefore, the present invention
Compared to the conventional wide latitude technique using a silver halide emulsion with a wide grain size distribution, the latitude is excellent, and graininess, gradation, desensitization, and fog suppression are significantly improved. Next, the present invention is illustrated by examples, but the present invention is not limited thereto. First, the method for preparing the emulsions used in the examples is shown below. [Preparation of polydisperse emulsion] Silver nitrate aqueous solution and alkali halide aqueous solution were
Gelatin aqueous solution and excess halide were added in advance and allowed to fall naturally into a reaction vessel kept at 60°C. Next, Demol N aqueous solution manufactured by Kao Atlas Co., Ltd. and magnesium sulfate aqueous solution were added to perform precipitation and desalting, gelatin was added, and pAg7 An emulsion of .8 and PH6.0 was obtained. Furthermore, chemical ripening was performed using sodium thiosulfate, metal chloride, and rhodan ammonium, and 4
-Hydroxy-6-methyl-1,3,3a,7-
Tetrazaindene and 6-nitrobenzimidazole were added, and gelatin was further added to obtain a polydisperse silver iodobromide emulsion. The silver iodide mole % was changed by changing the alkali halide composition, and the average particle size and particle size distribution were changed by changing the addition time of the silver nitrate aqueous solution and the alkali halide aqueous solution. [Preparation of monodisperse emulsion] Into a reaction vessel containing silver halide seed particles and gelatin aqueous solution in advance, ammoniacal silver nitrate aqueous solution, potassium iodide and bromide were added while controlling the pAg and PH in the reaction vessel. Potassium aqueous solution was added in proportion to the increase in surface area during particle growth. Next, Kao Atlas Co., Ltd. Demol N aqueous solution and magnesium sulfate aqueous solution were added to perform precipitation and desalting, and gelatin was added to obtain an emulsion with pAg 7.8 and pH 6.0. Furthermore, sodium thiosulfate, chloroauric acid, and rhodan ammonium were added, and chemical ripening was performed to obtain 4-hydroxy-6-methyl-1,3,3a,
7-tetrazaindene and 6-nitrobenzimidasol were added, and gelatin was further added to obtain a monodisperse silver iodobromide emulsion. Here, by changing the ratio of potassium iodide and potassium bromide, the silver iodide mol% can be changed, and by changing the amounts of ammoniacal silver nitrate and potassium halide, the particle size can be adjusted. The crystal habit was changed by changing the pAg value. In addition, the core/shell emulsion is disclosed in the above-mentioned Japanese Patent Application Laid-open No. 1986-
Produced by the method described in Publication No. 48521. Table 1 shows the physical properties of each silver iodobromide emulsion produced. As a measure of the width of the exposure latitude,
The Theory of the Photographic Process by T.H. James, 4th Edition, Vol.
The linear exposure range described on pages 501-502
exposure scale, hereinafter referred to as LES. ) was used. Sensitivity was expressed as a relative value of the reciprocal of the exposure amount that gives a fog density of +0.1. Graininess is a relative value, with the control sample being 100 times the standard deviation of the variation in density that occurs when a dye image with a dye pixel density of 1.0 is scanned using a microdensitometer with a circular scanning aperture of 25μ. Indicated.

【table】

[Sample 1]

Layer 1...0.40g of black colloidal silver and 3.0g of gelatin
Antihalation layer 2 containing: 1.20 g of a green-sensitive silver iodobromide emulsion (an emulsion obtained by color-sensitizing Emulsion C listed in Table 1 to green sensitivity), 0.80 g
A green-sensitive silver iodobromide emulsion (an emulsion obtained by color-sensitizing the emulsion listed in Table 1) and 10.0 mol % of 1-(2,4,6-trichlorophenyl)- based on silver halide. 3-[3-(2,4-di-t-
amylphenoxyacetamide)benzamide]-5-pyrazolone (hereinafter referred to as M-1)
Green-sensitive emulsion layer 3 containing 0.90 g of tricresyl phosphate (hereinafter referred to as TCP) dissolved in...Protective layer containing 2.3 g of gelatin Samples 2 to 7 in the same manner as Sample 1 above was created. The emulsions and mixing ratios used for each are listed in Table 2. Each of these samples was exposed to white light through an optical wedge and then processed through the processing steps described below to obtain a dye image. The obtained characteristic values are shown in Table 2. Processing process [Processing temperature 38℃] Processing time Color development 3 minutes 15 seconds Bleaching 6 minutes 30 seconds Washing with water 3 minutes 15 seconds Fixing 6 minutes 30 seconds Washing with water 3 minutes 15 seconds Stabilization 1 minute 30 seconds Drying Each treatment The composition of the treatment liquid used in the process is as follows. [Color developer] 4-amino-3-methyl-N-ethyl-N-
(β-hydroxyethyl)-aniline sulfate
4.75g Anhydrous sodium sulfite 4.25g Hydroxylamine 1/2 sulfate 2.0g Anhydrous potassium carbonate 37.5g Sodium bromide 1.3g Nitrilotriacetic acid trisodium salt (monohydrate)
2.5g Potassium hydroxide 1.0g Add water to make 1. [Bleach solution] Ethylenediaminetetraacetic acid iron ammonium salt
100.0g Ethylenediaminetetraacetic acid diammonium salt
10.0g Ammonium bromide 150.0g Glacial acetic acid 10.0ml Add water to make 1, and adjust the pH using ammonia water.
Adjust to 6.0. [Fixer] Ammonium thiosulfate 175.0g Anhydrous sodium sulfite 8.6g Sodium metasulfite 2.3g Add water to make 1, and adjust to PH6.0 using acetic acid. [Stabilizing liquid] Formalin (37% aqueous solution) 1.5ml Konidax (manufactured by Konishiroku Photo Industry Co., Ltd.)
Add 7.5ml water to make 1.

[Sample 8]

Layer 1...Antihalation layer containing 0.40 g of black colloidal silver and 3 g of gelatin Layer 2...0.75 g of emulsion C each color sensitized to red sensitivity
and 0.75 g of Emulsion I and 2.2 g of gelatin and
1.0 g of 1-hydroxy-4-(β-methoxyethylaminocarbonylmethoxy)-N-[δ-
(2,4-di-t-amylphenoxy)butyl]
-2-naphthamide [hereinafter referred to as C-1]. ],
0.075 g of 1-hydroxy-4-[4-(1-hydroxy-δ-acetamido-3,6-disulfo-2-naphthylazo)phenoxy]-N-[δ
-(2,4-di-t-amylphenoxy)butyl-2-naphthamide disodium [hereinafter referred to as
It is called colored cyan coupler (CC-1). ] and 0.01 g of 1-hydroxy-2-[δ-
(2,4-di-t-amylphenoxy)-n-butyl]naphthamide, 0.07 g of 2-bromo-4
-(2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
7,7,8,8,9,9,-hexadecafluorononanoylamino)-7-nitro-2-(1-
Phenyl-5-tetrazolylthio)-1-indanone [hereinafter referred to as DIR compound (D-1). ]
A low-speed red-sensitive emulsion layer containing 0.8g of TCP dissolved in. Layer 3...1.5g of highly sensitive red-sensitive silver iodobromide emulsion (first
A red-sensitized emulsion of Emulsion A listed in the table),
High-speed red-sensitive emulsion layer containing 1.2 g of gelatin and 0.30 g of TCP in which 0.26 g of cyan coupler (C-1) and 0.03 g of colored cyan coupler (CC-1) were dissolved. Layer 4: 0.07 g of 2.5-di-t-octylhydroquinone [hereinafter referred to as antifouling agent (HQ-1). ] was dissolved in 0.04 g of n-dibutyl phthalate [hereinafter referred to as DBP]. ] and an intermediate layer containing 0.8 g of gelatin. Layer 5...0.70g of emulsion C each color sensitized to green sensitivity
and 0.70g emulsion and 2.2g gelatin and
0.8 g magenta coupler (M-1), 0.15 g 1-(2,4,6-trichlorophenyl)-4-
(1-naphthylazo)-3-(2-chloro-5-
octadecenyl succinimide anilino)-5
-Pyrazolone [hereinafter referred to as colored magenta coupler (CM-1). ], a low-speed green-sensitive emulsion layer containing 0.95 g of TCP in which 0.012 g of DIR compound (C-1) was dissolved. Layer 6...1.6 g of emulsion A color sensitized to green sensitivity, 1.9
A high-speed green-sensitive emulsion layer containing 0.25 g of TCP in which g of gelatin and 0.20 g of magenta coupler (M-1) and 0.049 g of colored magenta coupler (CM-1) were dissolved. Layer 7...0.15g yellow colloidal silver, 0.11g DBP in which 0.2g antifouling agent (HQ-1) was dissolved and
Yellow filter layer containing 1.5g gelatin. Layer 8...0.2g of emulsion C each color sensitized to blue sensitivity
and 0.3g emulsion and 1.9g gelatin and 1.5
g of α-pivaloyl-α-(1-benzyl-2
-phenyl-3,5-dioxoimidazolidin-4-yl)-2'-chloro-5'-[α-dodecyloxycarbonyl)ethoxycarbonyl]acetanilide [hereinafter referred to as Y-1]. ] Low-speed blue-sensitive emulsion layer layer 9 containing 0.6 g of TCP dissolved in...0.8 g of emulsion A color-sensitized to blue sensitivity, 1.5
High-sensitivity blue-sensitive emulsion layer 10 containing 0.65 g of TCP in which 1.30 g of yellow coupler (Y-1) and 1.30 g of yellow coupler (Y-1) were dissolved... Protective layer containing 2.3 g of gelatin Sample 9 in the same manner as Sample 8 above ~14 were made. The emulsions and mixing ratios used for each are listed in Table 3. Each of these samples was exposed to white light through an optical wedge and then subjected to the processing shown in Example 1 to obtain color images having the characteristic values shown in Table 3.

【table】

[Table] From Table 3, inventive samples 10 to 14 are comparative samples 8 to 14.
It can be seen that compared to No. 9, the LES is larger, that is, the exposure latitude is wider, and the RMS value is smaller, that is, the graininess is excellent. Example 3 After gold-sulfur sensitization of emulsions C and I, 2:
A mixed emulsion with a mixing ratio of 1 is prepared, and silver is deposited on a polyethylene terephthalate film using a conventional method.
Sample 15 was prepared by applying the gelatin at 3.0 g/m ² and gelatin at 5.0 g/m ² . Sample 16 in the same way as sample 15
~18 were made. The emulsions and mixing ratios used for each are listed in Table 4. Each of these samples was exposed to white light through an optical wedge and then subjected to D-76 black and white negative development. Table 4 shows the sensitometry results. From this result, the sample of the present invention shows a large value of LES. In other words, it can be seen that it is a wide latitude.
In addition, the results showed that the sample of the present invention was superior to the comparative sample in terms of graininess.

【table】

Claims (1)

[Claims] 1 At least two particles having different average particle sizes are placed on a support.
In a silver halide photographic light-sensitive material having at least one silver halide emulsion layer containing substantially monodisperse silver halide grains of species, each of the monodisperse halides contained in the silver halide emulsion layer The silver iodide content of the silver grains is the smallest in the grains with the largest average grain size, and further changes at a rate of 0.3 mol% or more for every 0.1μ decrease in the average grain size. A silver halide photographic light-sensitive material.