JPH11174619A - Silver halide photosensitive material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a silver halide photosensitive material which is improved in blackness of transmission and reflection of image silver, has high sensitivity and high silver covering power, little causes residual color and further can be improved in contamination to fluorescent sensitized paper. SOLUTION: This is a blue-colored medical silver halide emulsion layer having at least one layer of silver halide emulsion on a support, wherein 50% or more of the total projection area of silver halide particles contained in the silver halide emulsion layer is occupied by flat particles having the aspect ratio of 5 or more, the flat particles have iodine silver bromide having the average silver iodine content of 1 mol.% or less or silver bromide composition and are chemically sensitized by a selenium compound and/or a tellurium compound, a pigment and/or a dye having the maximum absorption wavelength between 570-650 nm is contained in the silver halide emulsion layer and/or an upper hydrophilic colloidal layer above the silver halide emulsion layer, and the content of the pigment and/or the dye is set in such a manner that among the unexposed part white transmission density after development process, the contribution of the pigment and/or the dye is 50% or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver halide photographic material having a good image tone and capable of improving the stainability on fluorescent intensifying screens and the like.

[0002]

BACKGROUND OF THE INVENTION The covering power of silver halide emulsions is of great interest to emulsion manufacturers. The reason is,
This is because the use of an emulsion having a high covering power can save the amount of silver required to maintain a constant optical density.

The use of tabular grains having a high aspect ratio and a small grain thickness significantly increases the developing silver covering power, as described in US Pat. Nos. 4,411,986, 4,434,226 and 4,413,
Nos. 053, 4,414,304, 4,414,306, and 4,43
No. 5,501 and the like.

Further, ultra-thin tabular grains having a thickness of less than 0.07 μm are disclosed in JP-A-62-99751, JP-A-62-115435,
It is disclosed in JP-A-6-43605 and JP-A-6-43606.

[0005] European patents (EP) 0699944A, EP0699946A,
EP0699947A, JP-A-8-101476, JP-A-8-101475,
JP-A-8-101473, JP-A-8-101472, JP-A-8-69069
No. 5,494,789 discloses a technique relating to tabular grains having an epitaxial portion and having a high aspect ratio.

[0006] However, the color tone of the developed silver of the emulsion grains giving the high silver covering power depends on the grain size and grain thickness, but almost always has a yellow tint, giving an unpleasant impression to an image observer. The reason for the yellowish tint is that as the grain size and grain thickness decrease, the size and thickness of the developed silver also decrease, the scattering of blue light components increases, and the yellowish light becomes strong. Such a phenomenon is caused by a fine grain emulsion (for example, having an average grain size of 0.
This is particularly problematic when tabular grains having a small grain thickness (for example, grain thickness of 0.4 μm or less) are used. Generally, in order to adjust the color tone of developed silver, a so-called tone agent is often used. As the color tone agent, for example, a certain kind of mercapto compound is used. However, even if such a conventionally well-known toning agent is applied to an emulsion composed of silver halide grains having high sensitivity, a remarkable desensitizing effect is caused, and it cannot be put to practical use.

Therefore, Japanese Patent Application Laid-Open Nos. 60-154251 and 62-27
No. 6539, JP-A-61-285445, JP-A-5-204085, containing a substantially water-insoluble dye in the light-sensitive material so that the developed silver tone becomes neutral black. It is widely used to adjust the color tone. Also, JP-A-4-234035, JP-A-7-199394, and EP 655645A1, by including a pigment in the photographic material, control of the developed silver tone and residual color after processing with a spectral sensitizing dye. It is disclosed that an improvement of

However, when the aspect ratio of the tabular grains is further increased, not only the developed silver tone of transmission becomes yellowish but also the developed silver tone of reflection becomes reddish brown, giving a very unpleasant impression. .

In general, even when transmitted light is observed, when external light is present, reflected light is often included at a constant rate, and it is desired that the reflected color tone of developed silver be black.
However, with respect to this problem, the above-mentioned prior art was not sufficient.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is, first, to improve the blackness of transmission and reflection of image silver, and to provide a high sensitivity, high silver coverage, and low residual color. An object of the present invention is to provide a silver halide photographic light-sensitive material. Secondly, in addition to these, it is an object of the present invention to provide a silver halide photographic light-sensitive material having less contamination to fluorescent intensifying screens and the like. Thirdly, it is another object of the present invention to provide a silver halide photographic light-sensitive material having excellent image recognizability after development processing.

[0011]

The object of the present invention has been attained by the following. (1) A blue-dyed medical silver halide photographic material having at least one silver halide emulsion layer on a support, wherein all projections of silver halide grains contained in the silver halide emulsion layer are provided. 50% or more of the area is occupied by tabular grains having an aspect ratio of 5 or more, and the tabular grains have a silver iodobromide or silver bromide composition having an average silver iodide content of 1 mol% or less. And sensitized by a selenium compound and / or a tellurium compound, and 570 to 650 n in the silver halide emulsion layer and / or the hydrophilic colloid layer above the silver halide emulsion layer.
m, a pigment and / or a dye having a maximum absorption wavelength is contained, and the content of the pigment and / or the dye is in the unexposed portion white transmission density after the development processing.
A silver halide photographic light-sensitive material, wherein the contribution of the pigment and / or dye is 50% or more. (2) The silver halide photographic light-sensitive material according to the above (1), wherein the pigment contains an anthraquinone pigment. (3) The silver halide photographic material as described in the above item (1) or (2), wherein the pigment contains a metal phthalocyanine pigment and a dioxazine pigment. (4) Any one of the above (1) to (3), wherein the pigment and / or dye is contained in a hydrophilic colloid layer above the silver halide emulsion layer and below the surface protective layer. Silver halide photographic material. (5) Of the unexposed area white light transmission density after the development processing,
The silver halide photographic light-sensitive material according to any one of the above (1) to (4), wherein the contribution of the pigment and / or dye is 80% or more. (6) When the support is not dyed and an undercoat layer is present on the support, the silver halide according to any one of (1) to (5) above, wherein the undercoat layer is not dyed. Photosensitive material.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The silver halide photographic light-sensitive material of the present invention is a medical silver halide photographic light-sensitive material stained with blue, and the aspect ratio is 5 or more of 50% or more of the total projected area of the silver halide grains contained in the silver halide emulsion layer. And the composition of the tabular grains is silver iodobromide or silver bromide having an average silver iodide content of 1 mol% or less, and these grains are composed of a selenium compound and / or a tellurium compound. Is chemically sensitized by Further, the silver halide emulsion layer and the hydrophilic colloid layer above the silver halide emulsion layer contain a predetermined pigment and / or dye. The content is such that the contribution of the dye is 50% or more.

As a result, the blackness of the image silver is improved,
A silver halide photographic light-sensitive material having high sensitivity and little residual color can be obtained. On the other hand, the ratio of the tabular grains having the high aspect ratio to the total projected area of the silver halide grains is 50%.
If it is less than 1, the sensitivity is remarkably reduced, and if the average silver iodide content exceeds 1 mol%, a residual color is generated. On the other hand, if the content of the pigment or the dye is not contained in the above-mentioned predetermined layer, or if the content of the pigment or the dye is less than 50% to the unexposed area white transmission density after the development processing, the silver tone is increased. Is worsened.

In order to improve the silver tone, it is preferable to include a pigment or a dye in an intermediate layer or a protective layer located above the silver halide emulsion layer.

From the viewpoint of eliminating contamination on the fluorescent intensifying screen and the like, it is preferable to include a pigment or a dye in the intermediate layer or the silver halide emulsion layer below the surface protective layer.

For these reasons, it is most preferable that the pigment or dye is contained in an intermediate layer between the surface protective layer and the silver halide emulsion layer.

In order to improve the recognizability of the image after the development processing, it is preferable that the content of the pigment or dye is at least 80% of the unexposed portion white transmission density. Is preferably not dyed or colored.

The present invention will be described in further detail. The silver halide photographic light-sensitive material of the present invention comprises at least one photographic material on a support.
A silver halide emulsion layer. The number of silver halide emulsion layers may be one, or two or more (preferably four or less).

The silver halide photographic light-sensitive material of the present invention may be incorporated in a silver halide emulsion layer and / or a hydrophilic colloid layer above the silver halide emulsion layer in a range of 570 to 650 nm, more preferably 580 to 640 nm. Contains a pigment and / or dye having a maximum absorption wavelength. The pigment and / or dye of the present invention may be used alone or in combination. In either case, the maximum absorption wavelength is preferably from 570 to 650 nm, more preferably from 580 to 640 nm.

As the pigment used in the present invention, commercially available pigments and known pigments described in various documents can be used. For literature, see Color Index (The Soci
etyof Dyers and Colorists), “Revised New Edition Pigment Handbook”, edited by the Japan Pigment Technology Association (1989), “Latest Pigment Application Technology”, CMC Publishing (1986), “Printing Ink Technology”, CMC Publishing (1984), W. Herbst, K. Hunge
r Co-authored Industrial Organic Pigments (VCH Verlags
gesellshaft, 1993). In particular,
Organic pigments include azo pigments (azo lake pigments, insoluble azo pigments, condensed azo pigments, chelate azo pigments), polycyclic pigments (phthalocyanine pigments, anthraquinone-based raw materials, perylene and perinone pigments, indigo-based pigments, quinacridone-based pigments, and dioxazine-based pigments. Pigments, isoindolinone pigments, quinophthalone pigments, diketopyrrolopyrrole pigments, etc., dyeing lake pigments (lake pigments of acidic or basic dyes), azine pigments, and inorganic pigments can be used. Among them, phthalocyanine pigments, anthraquinone-based indanthrone pigments, dyed lake pigment-based triarylcarbonium pigments, indigo, and ultramarine blue of inorganic pigments and cobalt blue are preferable for obtaining a preferable bluish color tone. In order to further adjust the color tone, a red or purple pigment such as a dioxazine pigment, a quinacridone pigment, a diketopyrrolopyrrole pigment, or the like may be used in combination with the blue pigment. In particular, it is preferable to use an anthraquinone pigment or a combination of a metal phthalocyanine pigment and a dioxazine pigment.

Specific examples of preferred pigments will be listed below.
Examples of blue pigments include phthalocyanine-based CI Pigmen
t Blue 15, 15:15, 15: 2, 15: 3, 15: 4, 15: 6
(Copper phthalocyanine), monochloro or low chlorinated copper phthalocyanine, CI Pigment Blue 16 (metal-free phthalocyanine), phthalocyanine whose central metal is Zn, Al, Ti, indanthrone-based C.
I. Pigment Blue 60 and their halogen-substituted products, such as
CIPigmentBlue 64, 21; azo-based CIPigment Blue
25, Indigo-based CI Pigment Blue 66 and lake pigment CI Pigment Blue 63, triarylcarbonium type acidic dye or basic dye lake pigment CI Pigment Blue 1, 2, 3, 9, 9, 10 14,
18, 18, 19:24, 24: x, 56, 61, and 62. As red to purple pigments, dioxazine-based C.
I. Pigment Violet 23, 37, Azo-based CI Pigment Vio
let 13, 25, 32, 44, 50, CI Pigment Red
23, 52: 1, 57: 1, 63: 2, 146, 150, 151,
175, 176, 185, 187, 245, quinacridone-based CI Pigment Violet 19, 42, and CI Pigment Red 12
2, 192, 202, 207, 209, CIigment Violet 1, a triarylcarbonium-based lake pigment,
2, 3, 27, 39, CI Pigment Red 81: 1, Perylene-based CI Pigment Violet 29, Anthraquinone-based CIP
igmentViolet 5: 1, 31 and 33, thioindigo CI
Pigment Red 38 and 88.

A specific example of a pigment preferably used in the present invention is CI Pigment Blue 60 [compound (1)].
And copper phthalocyanine [compound (2)] such as CI Pigment Blue 15;
ent Violet 23 [Compound (3)] or CI Pigment V
iolet 37 [compound (4)] is preferably used. Copper phthalocyanine and CIPigment Violet 23 or CIPig
When used together with ment Violet 37, the usage ratio (weight)
It is 50: 1 to 1: 1, more preferably 40: 1 to 3: 1.

[0023]

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[0024]

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[0025]

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[0026]

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The pigment which can be used in the present invention may be the above-mentioned naked pigment or a pigment which has been subjected to a surface treatment. Examples of the surface treatment include a method of surface-coating a resin or wax, a method of attaching a surfactant, and a method of bonding a reactive substance (for example, a silane coupling agent, an epoxy compound, or a polyisocyanate) to the pigment surface. And are described in the following documents. Properties and application of metal soap (Koshobo) Printing ink technology (CMC Publishing, 1984) Latest pigment application technology (CMC Publishing, 1986)

In the present invention, the pigment is used by being dispersed in a binder. As the dispersant, various ones according to the binder and the pigment to be used, for example, a surfactant type low molecular dispersant or a high molecular dispersant can be used. Examples of dispersants include JP-A-3-69949, EP 549,486.
And the like.

In the present invention, the pigment is prepared by dispersing a pigment, which has been treated so as to be easily dispersible in an organic solvent by the above-mentioned surface treatment, in a high-boiling-point solvent, adding the resultant to a hydrophilic colloid solution, and emulsifying the pigment. It can also be used.

The average particle size of the pigment that can be used in the present invention is preferably in the range of 0.01 to 10 μm after dispersion,
More preferably, it is 1 μm.

As a method for dispersing the pigment in the binder, known dispersion techniques used in the production of inks and toners can be used. Examples of the dispersing machine include a sand mill, an attritor, a pearl mill, a super mill, a ball mill, an impeller, a disperser, a KD mill, a colloid mill, a dynatron, a three-roll mill, and a pressure kneader. For details, refer to “Latest Pigment Application Technology” (CMC Publishing, 19
86).

The dyes used in the present invention are water-insoluble and can be present as dyes in the photographic material even after development processing, and include pyrazolol dyes, anthraquinone dyes, azo dyes, azomethine dyes, indoaniline dyes, oxonol dyes, Among carbocyanine dyes, styryl dyes, triphenylmethane dyes, etc., the maximum absorption wavelength is 570 nm to 650
nm, more preferably 580 to 640 nm. In this specification, the maximum absorption wavelength of a dye means the maximum absorption wavelength in a state where the dye is present in a light-sensitive material. Among the above dyes, safety for development processing,
Considering the effects on photographic properties such as light fastness, desensitization, fog, and stain, preferred ones are used among pyrazolol dyes, anthraquinone dyes, azo dyes, azomethine dyes, and indoaniline dyes. More preferred are a pyrazolol dye and an anthraquinone dye. Specific examples of the dye used in the present invention are shown below.

[0033]

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[0034]

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[0035]

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[0036]

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The dye used in the present invention can be dispersed by various known methods. A method in which the dye of the present invention is directly dissolved or dispersed in an emulsion layer or a hydrophilic colloid layer, or a method in which the dye is dissolved or dispersed in an aqueous solution or a solvent and then used in the emulsion layer or the hydrophilic colloid layer. Suitable solvents, for example, methyl alcohol, ethyl alcohol, propyl alcohol, methyl cellosolve, JP-A-48-9715, U.S. Pat.
The compound may be dissolved in a halogenated alcohol, acetone, water, pyridine, or the like described in the above item, or a mixed solvent thereof, and added in the form of a solution.

A method of dispersing the compound by dissolving the compound in an oil, that is, a solvent substantially insoluble in water and having a boiling point of about 160 ° C. or higher, in a hydrophilic colloid solution. Examples of the high boiling point solvent include, as described in U.S. Pat.No.2,322,027, for example, phthalic acid alkyl ester (dibutyl phthalate, dioctyl phthalate, etc.), phosphate ester (diphenyl phosphate, triphenyl phosphate, tricresyl) Phosphate, dioctyl butyl phosphate), citrate (e.g., tributyl acetyl citrate), benzoate (e.g., octyl benzoate), alkylamide (e.g., diethyl laurylamide), fatty acid esters (e.g., dibutoxyethyl succinate, Diethyl azelate), trimesic esters (eg, tributyl trimesate) and the like can be used. Organic solvents having a boiling point of about 30 ° C. to about 150 ° C., for example, ethyl acetate, lower alkyl acetates such as butyl acetate, ethyl propionate, secondary butyl alcohol, methyl isobutyl ketone, β-ethoxyethyl acetate,
Methyl cellosolve acetate and water-soluble solvents,
For example, alcohols such as methanol and ethanol can be used. Here, the use ratio of the dye to the high boiling point solvent is preferably 10 to 1/10 (weight ratio).

A method of incorporating the dye and other additives of the present invention into a photographic emulsion layer or other hydrophilic colloid layer as a filled polymer latex composition. As the polymer latex, for example, a polyurethane polymer, a polymer polymerized from a vinyl monomer, or the like can be used. Suitable vinyl monomers include acrylates (methyl acrylate, ethyl acrylate, butyl acrylate, hexyl acrylate, octyl acrylate, dodecyl acrylate, glycidyl acrylate, etc.), α-substituted acrylates (methyl methacrylate, butyl methacrylate, octyl methacrylate, Glycidyl methacrylate), acrylamide (butyl acrylamide, hexyl acrylamide, etc.), α-substituted acrylamide (butyl methacrylamide, dibutyl methacrylamide, etc.), vinyl ester (vinyl acetate, vinyl butyrate, etc.), vinyl halide (vinyl chloride, etc.), Vinylidene halides (vinylidene chloride, etc.), vinyl ethers (vinyl methyl ether, vinyl octyl ether, etc.), styrene, side-chain substituted styrene (α- Rusuchiren etc.), nucleus-substituted styrene (hydroxystyrene, chlorostyrene, methyl styrene, etc.), ethylene, propylene, butylene, butadiene, and acrylonitrile can. These may be used alone or in combination of two or more kinds, or other vinyl monomers may be mixed as a minor component. Examples of other vinyl monomers include itaconic acid, acrylic acid, methacrylic acid, hydroxyalkyl acrylate, hydroxyalkyl methacrylate, sulfoalkyl acrylate, sulfoalkyl methacrylate, and styrene sulfonic acid. These filled polymer latex, JP-B-51-39853, JP-A-51-59943, JP-A-53-137131, JP-A-54-32552
No., JP-A-54-107941, JP-A-55-133465, JP-A-56
-19043, JP-A-56-19047, JP-A-56-126830, and JP-A-58-149038. Here, as the usage ratio of the dye and the polymer latex,
10 to 1/10 (weight ratio) is preferred. In addition, latex is
Usually, an emulsion in which a macromolecule (polymer) is colloidally dispersed in water by the action of an emulsifier is used. Here, the polymer latex refers to a polymer in the latex.

A method in which a hydrophilic polymer having a charge opposite to that of a dye ion coexists in a layer as a mordant, and the dye is localized in a specific layer by an interaction between the dye and a dye molecule. Polymer mordants include polymers containing secondary and tertiary amino groups, polymers having a nitrogen-containing heterocyclic moiety, and polymers containing these quaternary cationic groups, and having a molecular weight of 50.
It is preferably at least 00, particularly preferably at least 10,000. For example, vinylpyridine polymers and vinylpyridinium cationic polymers described in U.S. Pat.No. 2,548,564 and the like; vinylimidazolium cationic polymers disclosed in U.S. Pat.No.4,124,386 and the like;
U.S. Pat.No. 3,898,088; U.S. Pat.No. 3,898,088; U.S. Pat.No.3,988,088; U.S. Pat. Water-insoluble mordant disclosed in U.S. Pat. No. 4,168,976; a reactive mordant capable of covalently bonding to a dye disclosed in U.S. Pat.No. 4,168,976; dialkylaminoalkyl described in British Patent No. 685,475, etc. Polymers derived from ethylenically unsaturated compounds with ester residues; products obtained by the reaction of a polyvinyl alkyl ketone with aminoguanidine as described in GB 850,281; US Patent
Polymers derived from 2-methyl-1-vinylimidazole as described in 3,445,231 can be mentioned.

A method in which a compound is dissolved using a surfactant. Useful surfactants may be oligomers or polymers; for details of the polymers, see
JP-A-53-138726, JP-A-60-200251, JP-A-60-203
935 and Japanese Patent Application No. 59-12766.

In the above method, a hydrophilic polymer is used in place of the high boiling point solvent or in combination with the high boiling point solvent. This method is described, for example, in West German Patent 1,957,467.

A microcapsule method using a polymer having a carboxyl group, a sulfonic acid group or the like at a terminal as described in JP-A-59-113434. Further, for example, a hydrosol of a lipophilic polymer described in JP-B-51-39835 may be added to the hydrophilic colloid dispersion medium obtained above.
As the hydrophilic colloid, gelatin is typical, but any other conventionally known colloids usable for photography can be used.

In the present invention, the content of the pigment and / or dye in the silver halide emulsion layer and / or the hydrophilic colloid layer above the silver halide emulsion layer is determined by determining the unexposed white light transmission after the development processing. The concentration is preferably such that the contribution of the pigment and / or dye is at least 50%, preferably at least 80%. As a method of evaluating the concentration contribution, specifically,
The unexposed sample is only fixed and washed, or, if a dye which decolorizes in the developing step is contained, further developed, fixed and washed. In any case, washing is carried out sufficiently to remove the residual color of the spectral sensitizing dye, followed by drying. The difference between the white light transmission density of this sample and the white light transmission density of the support used is the white light transmission density of the pigment and / or dye. Is the concentration contribution of the pigment and / or dye. The white light transmission density is not particularly limited as long as it is measured using a visibility correction filter, for example, using a Corning filter 4-76,
It is preferable to use a visual filter of a Macbeth densitometer.

[0045] The addition amount of the pigment and / or dye, is preferably sensitive material per surface ^{1mg / m 2 ~100mg / m 2} , 20mg
/ m ^{2 to} 70 mg / m ² is more preferred. As a position to add,
A silver halide emulsion layer and / or a hydrophilic colloid layer above the silver halide emulsion layer are preferred. One of the objects of the present invention is to absorb the undesired reflected light component of the developed silver at a position above the developed silver. Therefore, the pigments and / or dyes of the present invention may not be sufficiently added to the silver halide emulsion layer alone, and may be added to the hydrophilic colloid layer located farther from the support than the silver halide emulsion layer. Is more preferable. The hydrophilic colloid layer to be added may be a protective layer provided on the uppermost layer, or may be an intermediate layer provided between the protective layer and the emulsion layer.

Pigment in silver halide light-sensitive material and / or
Alternatively, when the fixing property of the dye is low, contamination of the fluorescent intensifying screen and the automatic developing machine may occur. Therefore, the pigment and / or the dye are most preferably added to the intermediate layer.

Examples of the support used in the present invention include films made of semi-synthetic or synthetic polymers such as cellulose nitrate, cellulose acetate, cellulose acetate butyrate, polystyrene, polyvinyl chloride, polyethylene terephthalate, polycarbonate, etc .; α-olefin polymer (for example, polyethylene, polypropylene,
Paper or the like on which an ethylene / butene copolymer) or the like is applied or laminated.

The support of the present invention may be colored (dyed) using a dye or a pigment, and the undercoat layer for improving the adhesion to a photographic emulsion layer or the like may also be colored using a dye or a pigment. May be. In the present invention, as described above, since the silver halide emulsion layer and / or the hydrophilic colloid layer above the silver halide emulsion layer is colored with a pigment and / or a dye, the support is not colored. It is preferable that the density of the exposed portion is not excessively high, and among the unexposed portion white light transmission density after the development processing, the contribution of the coloring of the support (contribution by the undercoat layer when the undercoat layer is present) Also included)
Is less than 50%, preferably 48% or less, more preferably less than 20%, even more preferably 18% or less, particularly preferably 10%
It is most preferred that the support (including the undercoat layer, if present) is not colored at all. At this time, the white light transmission density of the unexposed area after the development processing of the photosensitive material of the present invention is 0.15 to 0.35, and preferably 0.15 to 0.25. In addition,
The development processing here is not only so-called development, but also fixing,
It refers to a series of processing including washing with water.

Next, the tabular silver halide emulsion used in the present invention will be described. The silver halide emulsion used in the silver halide photographic light-sensitive material of the present invention may have any silver halide composition such as silver bromide and silver iodobromide.

The silver iodide content was 1 mol%.
Or less, preferably 0 to 0.45 mol%.

For the silver halide emulsion preferably used in the present invention, the average of the equivalent circle diameters of the projected areas of the silver halide grains is calculated as the average value of all silver halide grains. The average of the equivalent circle diameters is preferably 0.1 μm or more and 2.0 μm or less, and particularly 0.1 μm or more and 1.8 μm or less.
m or less, more preferably 0.3 μm or more and 1.8 μm or less.
m or less is most preferred.

The silver halide grains in the silver halide emulsion may be used in combination with isotropically grown ones such as cubes, octahedrons and tetradecahedrons, or polyhedral crystals such as spheres. Is also good.

Tabular grains having parallel twin planes and having {111} planes as main planes, and tabular grains having {100} planes as main planes may be used.

The thickness of the tabular silver halide grains used in the present invention is preferably from 0.05 μm to 0.25 μm, more preferably from 0.05 μm to 0.2 μm.

The aspect ratio of tabular silver halide grains is defined as the value obtained by dividing the equivalent circle diameter of the projected area of one grain by the thickness of the grain, and in the present invention, the total projected area of the silver halide grains in the emulsion is determined in the present invention. 50% or more has an aspect ratio of 5 or more, preferably 5 or more and less than 30, and more preferably 5 or more and 25 or less. The average aspect ratio is preferably 5 or more, particularly preferably 5 to 20.

The proportion of tabular silver halide grains having an aspect ratio of 5 or more is preferably such that the sum of the projected areas is 50% or more and 100% or less with respect to the sum of the projected areas of all grains.
It is more preferably 70% or more and 100% or less, and most preferably 90% or more and 100% or less.

The production method of tabular silver halide grains is as follows.
This can be achieved by appropriately combining methods known in the art.

The tabular grains of the present invention having parallel twin planes and having {111} planes as main planes are disclosed in JP-A-58-12792.
7, JP-A-58-113927, JP-A-58-11
It can be easily prepared by referring to the method described in No. 3928 and the like.

Also, a relatively low pBr of pBr 1.3 or less
The seed crystal is formed by forming a seed crystal in which tabular grains are present in an amount of 40% or more by weight in an atmosphere having the same value, and growing the seed crystal while simultaneously adding silver and a halogen solution while maintaining the same pBr value.

During the grain growth process, it is desirable to add a silver and halogen solution so that no new crystal nuclei are generated.

The size of the tabular silver halide grains can be adjusted by controlling the temperature, selecting the type and amount of the solvent, and controlling the addition rate of the silver salt and halide used during grain growth.

In the present invention, among the tabular silver halide grains, monodisperse hexagonal tabular grains are particularly useful grains.

The structure of the monodisperse hexagonal tabular grains and the details of the production method are as described in JP-A-63-151618.

The silver halide emulsion preferred in the present invention may have a uniform crystal structure, or may have a different halogen composition between the inside and the outside, or may have a layered structure. Further, it is preferable that a reduction sensitized silver nucleus is included during grain formation.

In the present invention, British Patent No. 635841
No. 3,622,318, so-called halogen conversion type (conversion type) particles can be used particularly effectively. The halogen conversion amount is preferably 0.05 mol% to 0.45 mol%, more preferably 0.1 mol% to 0.3 mol%, based on the silver amount.

In the silver iodobromide emulsion, grains having a structure having a high iodine layer inside and / or on the surface are particularly preferable.

Further, by converting the surface of tabular silver halide grains preferred in the present invention to a high iodine type, a silver halide emulsion with higher sensitivity can be obtained.

In carrying out the halogen conversion by the above method, a method in which a silver halide solvent is present is particularly effective. Preferred solvents include thioether compounds, thiocyanates, and 4-substituted thioureas. Among them, thioether compounds and thiocyanates are particularly effective, and it is preferable to use 0.5 g to 5 g of thiocyanate and 0.2 g to 3 g of thioether per 1 mol of silver halide.

The tabular grains of the present invention are preferably silver halide grains having dislocation lines.

The dislocation lines of tabular grains are described, for example, in JF Hamil
ton, Phot. Sci. Eng., 11, 57, (1967)
T. Shiozawa, J. Soc. Phot. Sci. Japan, 35, 21
3, (1972), can be observed by a direct method using a transmission electron microscope at a low temperature. That is, the silver halide grains taken out from the emulsion so as not to apply enough pressure to generate dislocations on the grains are placed on a mesh for observation with an electron microscope to prevent damage (printout, etc.) by electron beams. Observation is performed by a transmission method while the sample is cooled. At this time, the thicker the particle, the more difficult it is for an electron beam to pass through. Therefore, a clearer image can be observed by using a high-pressure electron microscope (200 kV or more for a particle having a thickness of 0.25 μm). From the photograph of the particles obtained by such a method, the position and the number of dislocations for each particle when viewed from the direction perpendicular to the main plane can be obtained.

In the course of silver halide grain formation or physical ripening, a cadmium salt, a zinc salt, a lead salt, a thallium salt, an iridium salt or a complex salt thereof, a rhodium salt or a complex salt thereof, an iron salt or a complex salt thereof, etc. are allowed to coexist. You may.

As the chemical sensitization in the present invention, chemical sensitization with a selenium compound and / or tellurium compound, that is, selenium sensitization and / or tellurium sensitization is used. In combination with this, in the present invention, sulfur sensitization or gold sensitization, which is a chalcogen sensitization other than selenium sensitization and tellurium sensitization, may be performed, and it is particularly preferable to combine gold sensitization.

In selenium sensitization, an unstable selenium compound is used, and JP-B-43-13489 and JP-B-44-157.
No. 48, JP-A-4-25832, JP-A-4-109240
Unstable selenium compounds described in JP-A Nos. 4-271341 and 5-40324 can be used. Specifically, colloidal metal selenium, selenoureas (eg, N, N-dimethylselenourea, trifluoromethylcarbonyl-trimethylselenourea, acetyl-trimethylselenourea), selenoamides (eg,
Selenoacetamide, N, N-diethylphenylselenoamide), phosphine selenides (eg, triphenylphosphine selenide, pentafluorophenyltriphenylphosphine selenide), selenophosphates (eg, tri-p-) Tolyl selenophosphate, tri-n-butylselenophosphate), selenoketones (for example, selenobenzophenone), isoselenocyanates, selenocarboxylic acids, selenoesters, diacyl selenides, and the like may be used. Further, non-labile selenium compounds described in JP-B-46-4553 and JP-B-52-34492, for example, selenous acid, potassium selenocyanide, selenazoles, selenides and the like can also be used.

In tellurium sensitization, an unstable tellurium compound is used, and Canadian Patent No. 800958, British Patent No. 1,
295,462, 1,396,696 each specification,
Unstable tellurium compounds described in JP-A-4-204640, JP-A-4-271341, JP-A-4-330343, and JP-A-5-303157 can be used. Specifically, telluroureas (e.g., tetramethyltellurourea, N, N'-dimethylethylenetellurourea,
N, N′-diphenylethylene tellurourea), phosphine tellurides (eg, butyl-diisopropylphosphine telluride, tributylphosphine telluride,
Tributoxyphosphine telluride, ethoxy-diphenylphosphine telluride, diacyl (di) tellurides (for example, bis (diphenylcarbamoyl) ditelluride, bis (N-phenyl-N-methylcarbamoyl) ditelluride, bis (N-phenyl) -N-methylcarbamoyl) telluride, bis (N-phenyl-N-benzylcarbamoyl) telluride, bis (ethoxycarbonyl) telluride), isosterocyanates, telluramides, tellurohydrazides, telluroesters (for example, butylhexyltelluro) Esters), telluroketones (for example,
Telluroacetophenone), colloidal tellurium, (di) tellurides, other tellurium compounds (potassium telluride, telluropentathionate sodium salt) and the like may be used.

In the sulfur sensitization, an unstable sulfur compound is used, and P. Grafkides, Chimie et Physique Photograph
ique (Paul Momtel, 1987, 5th edition), Research
Unstable sulfur compounds described in Disclosure 307, 307105 and the like can be used. Specifically, thiosulfates (eg, hypo), thioureas (eg, diphenylthiourea, triethylthiourea, N-
Ethyl-N ′-(4-methyl-2-thiazolyl) thiourea, carboxymethyltrimethylthiourea), thioamides (eg, thioacetamide), rhodanines (eg, diethyl rhodanine, 5-benzylidene-N-ethyl-) Rhodanine), phosphine sulfides (eg, trimethylphosphine sulfide), thiohydantoins, 4-oxo-oxazolidine-2-thiones, disulfides or polysulfides (eg,
Known sulfur compounds such as dimorpholine disulfide, cystine, lenthionine), mercapto compounds (for example, cysteine), polythionates, elemental sulfur, and active gelatin can also be used.

Regarding gold sensitization, see the aforementioned P. Grafkides.
Written by Chimie et Physique Photographique (Paul Momtel
Publishing Company, 1987, 5th edition), Research Disclosure Magazine 30
Gold salts described in Vol. 7, No. 307105, etc. can be used. Specifically, chloroauric acid, potassium chloroaurate, potassium aurithiocyanate, gold sulfide,
US Patent No. 2,642,361 in addition to gold selenide
And gold compounds described in JP-A-5,049,484 and JP-A-5,049,485 can also be used.
Further, a noble metal salt such as platinum, palladium, and iridium may be added.

The amount of the chalcogen sensitizer used in the present invention varies depending on the silver halide grains to be used, the conditions of chemical sensitization, etc., but is preferably 10 ^-8 to 10 per mol of silver halide.
^-2 mol, preferably about 10 ^{-7 to} 5 × 10 ^-3 mol is used.

The amount of the gold sensitizer and the noble metal sensitizer used in the present invention is from 10 ^-7 to 1 per mol of silver halide.
About 0 ^-2 mol is used. The conditions for chemical sensitization in the present invention are not particularly limited, but the pAg is preferably from 6 to 11, more preferably from 7 to 10, and the pH is from 4 to
10 is preferable, and the temperature is preferably 40 to 95C, more preferably 45 to 85C.

Regarding reduction sensitization, see the aforementioned P. Grafkides
Written by Chimie et Physique Photographique (Paul Momtel
Publishing Company, 1987, 5th edition), Research Disclosure Magazine 30
Known reducing compounds described in Vol. 7, No. 307105, etc. can be used. Specifically, aminoiminomethanesulfinic acid (also called thiourea dioxide), borane compound (for example, dimethylamine borane), hydrazine compound (for example, hydrazine, p-tolylhydrazine), polyamine compound (for example, diethylenetriamine, triethylene Tetramine), stannous chloride, silane compounds, reductones (eg, ascorbic acid), sulfites, aldehyde compounds, hydrogen gas, and the like may be used. The reduction sensitization may be performed in an atmosphere having a high pH or an excess of silver ions (so-called silver ripening).

In the silver halide emulsion of the present invention, the surface of the grains or a part thereof may be halogen-converted in the chemical sensitization step. As a method of performing halogen conversion,
Water-soluble bromide salts such as potassium bromide and sodium bromide, and water-soluble iodide salts such as potassium iodide can be used alone or in combination, and they are added as a solid or as an aqueous solution or a gelatin dispersion. can do. It is also preferable to add silver halide fine grains of silver bromide, silver iodobromide, and silver iodide, and these can be used alone or in combination. When added as fine particles, the fine particles preferably have an average equivalent sphere diameter of 0.1 μm or less, more preferably 0.05 μm or less. The fine particles can be prepared continuously by supplying an aqueous solution of silver nitrate and an aqueous solution of an alkali halide having an arbitrary composition to a mixer provided near the reaction vessel, and can be immediately added to the reaction vessel, or can be added to the reaction vessel in advance. It can also be added after being prepared in a batch manner in a container. If necessary, silver halide fine particles may contain ions or compounds of heavy metals such as iridium, rhodium, and platinum.

When preparing the emulsion of the present invention, for example, during grain formation,
In the desalting step, during the chemical sensitization, and before coating, the presence of a metal ion salt is preferable depending on the purpose. In the case of doping the grains, it is preferable to add them after the grains are formed and before the completion of the chemical sensitization, when modifying the grain surface or when using as a chemical sensitizer. The case of doping the whole grain and the method of doping only the core portion, only the shell portion, only the epitaxial portion, or only the tabular grain of the grain can be selected. Mg, Ca, Sr, Ba, Al,
Sc, Y, LaCr, Mn, Fe, Co, Ni, Cu,
Zn, Ga, Ru, Rh, Pd, Re, Os, Ir, P
t, Au, Cd, Hg, Tl, In, Sn, Pb, Bi
Etc. can be used. These metals can be added in the form of salts which can be dissolved at the time of particle formation, such as ammonium salts, acetates, nitrates, sulfates, phosphates, hydroxides, and six-coordinate and four-coordinate complexes. For example, Cd
Br ₂ , CdCl ₂ , Cd (NO ₃ ) ₂ , Pb (NO ₃ )
₂ , Pb (CH ₃ COO) ₂ , K ₃ [Fe (CN) ₆ ],
(NH ₄ ) ₄ [Fe (CN) ₆ ], K ₃ IrCl ₆ , (NH
₄ ) ₃ RhCl ₆ , K ₄ Ru (CN) _{6 and the} like.
The ligand of the coordination compound is halo, aquo, cyano, cyanate, thiocyanate, nitrosyl, thionitrosyl,
You can choose from oxo and carbonyl. These may use only one kind of metal compound, or may use two or more kinds in combination.

In some cases, a method of adding a chalcogen compound during emulsion preparation as described in US Pat. No. 3,772,031 is useful. In addition to S, Se, Te, cyanide salt,
Thiocyanates, selenocyanates, carbonates, phosphates, acetates may be present.

Chemical sensitization can be carried out in the presence of a so-called chemical sensitization auxiliary. Useful chemical sensitization aids include compounds known to suppress fog and increase sensitivity in the course of chemical sensitization, such as azaindene, azapyridazine and azapyrimidine. Examples of chemical sensitization aid modifiers are described in U.S. Pat.Nos. 2,131,038 and 3,411,914.
No. 3,554,757, JP-A-58-126526 and the aforementioned "Emulsion Chemistry" by Duffin, pp. 138-143.

It is preferable to use an oxidizing agent for silver during the production process of the emulsion of the present invention. The oxidizing agent for silver is
A compound that acts on metallic silver to convert it into silver ions. In particular, a compound that converts very fine silver particles by-produced in the process of forming silver halide grains and in the step of chemical sensitization into silver ions is effective. The silver ions generated here may form a silver salt that is hardly soluble in water such as silver halide, silver sulfide, silver selenide, or a silver salt that is easily soluble in water such as silver nitrate. Is also good. The oxidizing agent for silver may be inorganic or organic. Examples of the inorganic oxidizing agent include ozone, hydrogen peroxide and adducts thereof (for example, NaBO ₂ .H ₂ O ₂ .3H ₂ O, 2Na
_{CO 3 · 3H 2 O 2,} Na 4 P 2 O 7 · 2H 2 O 2, 2
Na ₂ SO ₄ .H ₂ O ₂ .2H ₂ O), peroxyacid salts (eg, K ₂ S ₂ O ₈ , K ₂ C ₂ O ₆ , K ₂ P ₂ O ₈ ),
Peroxy complex compounds (for example, K ₂ [Ti (O ₂ ) C
₂ O ₄ ] .3H ₂ O, 4K ₂ SO ₄ .Ti (O ₂ ) OH
_{· SO 4 · 2H 2 O,} Na 3 _{[VO (O 2) (C 2} H 4) 2
6H ₂ O), permanganate (eg, KMnO)
₄ ), oxyacid salts such as chromate (eg, K ₂ Cr ₂ O ₇ ), halogen elements such as iodine and bromine, perhalates (eg, potassium periodate), and salts of high-valent metals (eg, For example, potassium hexacyanoferrate) and thiosulfonate.

Examples of the organic oxidizing agent include quinones such as p-quinone, organic peroxides such as peracetic acid and perbenzoic acid, and compounds that release active halogen (eg, N-bromosuccinimide, chloramine T). , Chloramine B).

It is a preferred embodiment to use the above-described reduction sensitization and an oxidizing agent for silver in combination.

The emulsion of the present invention is usually subjected to spectral sensitization. Examples of the dye used for these include a cyanine dye,
Examples include merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes, hemicyanine dyes, styryl dyes, and hemioxonol dyes. Particularly useful dyes are those belonging to the cyanine dyes, merocyanine dyes and complex merocyanine dyes. As these dyes, any of nuclei usually used for cyanine dyes can be applied as basic heterocyclic nuclei. That is, a pyrroline nucleus, an oxazoline nucleus, a thiazoline nucleus, a selenazoline nucleus, a pyrrole nucleus, an oxazole nucleus,
A thiazole nucleus, a selenazole nucleus, an imidazole nucleus, a tetrazole nucleus, a pyridine nucleus, a tellurazole nucleus, etc .; a nucleus in which an alicyclic hydrocarbon ring is fused to these nuclei; and a nucleus in which an aromatic hydrocarbon ring is fused to these nuclei, That is, indolenine nucleus, benzindolenin nucleus, indole nucleus, benzoxazole nucleus, naphthoxazole nucleus, benzimidazole nucleus, naphthimidazole nucleus, benzothiazole nucleus, naphthothiazole nucleus, benzoselenazole nucleus, naphthoselenazole nucleus, quinoline nucleus And a benzotellurazole nucleus. These heterocyclic nuclei may be substituted on carbon atoms.

As the merocyanine dye or composite merocyanine dye, any nucleus generally used for merocyanine dyes can be applied as the nucleus having a ketomethylene structure. Particularly useful nuclei include a pyrazolin-5-one nucleus, a thiohydantoin nucleus, a 2-thiooxazolidine-2,4-dione nucleus, a thiazolidine-2,4-dione nucleus, a rhodanine nucleus, a thiobarbituric acid nucleus, and 2-thio Selenazolidine-
A 5- or 6-membered heterocyclic nucleus such as a 2,4-dione nucleus can be applied.

These sensitizing dyes may be used alone or in combination. Combinations of sensitizing dyes are often used, especially for supersensitization. Representative examples are U.S. Patent Nos. 2,688,545 and 2,977,229,
No. 3,397,060, No. 3,522,052, No. 3,527,641
No. 3,617,293, No. 3,628,964, No. 3,666,
No. 480, No. 3,672,898, No. 3,679,428, No. 3,
Nos. 703,377, 3,769,301, 3,614,609, 3,837,862, 4,026,707, and British Patent 1,344,
Nos. 281 and 1,507,803, Japanese Patent Publication No. 43-4936
No. 53-12375, JP-A-52-110618, JP-A-52-10992
It is described in each gazette of No. 5.

Further, these sensitizing dyes are dyes which do not themselves exhibit spectral sensitization, or which are substances which do not substantially absorb visible light and which are combined with sensitizing dyes to significantly increase spectral sensitization. May be used in combination with any compound known as a so-called supersensitizer. Representative examples of supersensitizers include:
Bispyridinium salt compounds described in JP-A-59-142541, stilbene derivatives described in JP-B-59-18691, potassium bromide and iodide taught in JP-B-49-46932, etc. Water-soluble bromides such as potassium, water-soluble iodides, condensates of aromatic compounds with formaldehyde described in US Pat. No. 3,743,510, etc., cadmium salts, azaindene compounds and the like.

The sensitizing dye is added after chemical ripening or before chemical ripening. For the silver halide grains of the present invention,
It is most preferable that the sensitizing dye is added during or before chemical ripening (for example, during grain formation or physical ripening).

In order to incorporate spectral sensitizing dyes into a silver halide emulsion, they may be directly dispersed in the emulsion,
Or water, methanol, ethanol, propanol,
Acetone, methyl cellosolve, 2,2,3,3-tetrafluoropropanol, 2,2,2-trifluoroethanol, 3
-Methoxy-1-propanol, 3-methoxy-1-butanol, 1-methoxy-2-propanol, N, N-
It may be added to an emulsion by dissolving it in a solvent such as dimethylformamide alone or in a mixed solvent. Also, U.S. Pat.
No. 9,987, a method of dissolving a dye in a volatile organic solvent, dispersing this solution in water or a hydrophilic colloid, and adding this dispersion to an emulsion,
As described in -24185, etc., a method of dispersing a water-insoluble dye in a water-soluble solvent without dissolving and adding this dispersion to an emulsion, JP-B-44-23389, JP-B-44-27555
As described in JP-B-57-22091, a method of dissolving a dye in an acid and adding this solution to an emulsion or adding an acid or a base to form an aqueous solution and adding it to an emulsion As described in U.S. Pat.No. 3,822,135 and U.S. Pat.No.4,006,025, a method of adding an aqueous solution or a colloidal dispersion in the presence of a surfactant to an emulsion is disclosed in JP-A-53-102733. As described in JP-A-58-105141, a method of directly dispersing a dye in a hydrophilic colloid and adding the dispersion to an emulsion, as described in JP-A-51-74624, It is also possible to use a method in which a dye is dissolved using a compound that causes a red shift, and this solution is added to the emulsion. Also, ultrasonic waves can be used for dissolution.

The photographic emulsion used in the present invention may contain various compounds for the purpose of preventing fog during the production process, storage or photographic processing of the photographic material, or stabilizing photographic performance. . That is, thiazoles such as benzothiazolium salts, nitroimidazoles, nitrobenzimidazoles, chlorobenzimidazoles, bromobenzimidazoles, mercaptothiazoles, mercaptobenzothiazoles, mercaptobenzimidazoles, mercaptothiadiazoles, amino Triazoles, benzotriazoles, nitrobenzotriazoles, mercaptotetrazole (particularly 1-phenyl-5-mercaptotetrazole)
Mercaptopyrimidines; mercaptotriazines; thioketo compounds such as oxadolinthione; azaindenes such as triazaindenes and tetraazaindenes (especially 4-hydroxy-6-methyl (1,3,3a, 7) Many compounds known as antifoggants or stabilizers, such as tetraazaindenes, pentaazaindenes and the like can be added. For example, U.S. Patent Nos. 3,954,474 and 3,982,947,
Those described in JP-A-52-28660 can be used. One of the preferred compounds is a compound described in Japanese Patent Application No. 62-47225. Antifoggants and stabilizers before particle formation,
During particle formation, after particle formation, water washing step, at the time of dispersion after water washing,
It can be added according to the purpose at various times before, during, after chemical sensitization and before coating.

In the present invention, it is also preferable to carry out chemical sensitization in the presence of a nucleic acid or a decomposition product thereof before the completion of chemical sensitization. As the nucleic acid or a decomposition product thereof, those described in JP-A-62-67541 can be used.
The nucleic acid used in the present invention includes deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Examples of the nucleic acid degradation products include those in the course of degradation and simple substances such as adenine, guanine, uracil, cytosine, and thymine. Particularly preferred nucleolytic products include adenine. These can be used alone or in combination. In this case, it goes without saying that the nucleic acid and the nucleic acid decomposition product may be used in combination. The amount of the nucleic acid or the decomposition product thereof varies depending on the type of the nucleic acid decomposition product, but is in the range of 20 mg or more, preferably 100 mg to 1 g per mol of silver halide. These nucleic acids or nucleic acid degradation products may be used alone or in combination of two or more.
The above-mentioned amount is sufficient for the total amount of addition.

In the light-sensitive material of the present invention, a crossover light cut layer may be provided between the light-sensitive emulsion layer and the support, if necessary, for the purpose of sharpening an image. A dye corresponding to the photosensitive wavelength region is added to the crossover light cut layer. Any dye can be used as long as it does not leave harmful absorption after the development processing. A method of adding a dye in a solid fine particle dispersion state is disclosed in JP-A-2-26493.
6, JP-A-3-210553, JP-A-3-2105
No. 54, JP-A-3-23847, JP-A-4-140
No. 38, JP-A-4-14039, JP-A-4-1256
No. 35, JP-A-4-338747, JP-A-6-275
No. 89, etc. Dyes that can be used include, for example, those represented by general formulas (I) to (V)
II) Dyes, Compound Examples I-1 to I-37, II-1 to II-
6, III-1 to III-36, IV-1 to IV-16, V-1 to V
-6, VI-1 to VI-13, VII-1 to VII-5. JP 8
Dyes of the general formula (1) described in -73767, Compound Example 1
~ 6. General formulas (VIII) to-described in JP-A-8-87091
Dyes of (XII), Compound Examples VIII-1 to VIII-5, IX-1
To IX-10, X-1 to X-21, XI-1 to XI-6, XII-
1 to XII-7.

In addition to these, a method of adsorbing a known dye to a mordant, a method of dissolving a known dye in oil and emulsifying and dispersing it in oil droplets, and a method of adsorbing a dye described in JP-A-3-5748 on an inorganic material surface For example, a method described in JP-A-2-298939, in which a dye is adsorbed on a polymer, can be used. As a method for adding the crossover light-cutting layer to the photosensitive material, those described in each specification can be used.

The light-sensitive material of the present invention may contain a dye for the purpose of detecting the position of the light-sensitive material. The dye preferably has an absorption spectrum corresponding to the maximum sensitivity wavelength of the detection sensor, and any dye can be used as long as it does not leave harmful absorption after development processing. Preferably, a dye having a maximum absorption at 700 nm to 1400 nm or a fine particle dispersion thereof is used. For example:

(1) Examples of the water-soluble dye to be decolorized at the time of treatment include compounds represented by general formulas (I) to
(IV) cyanine dyes, pyrylium dyes and aminium dyes, examples of compounds I-1 to I-6, II-1 to II-4, II
I-1 to III-4, IV-1 to IV-5.

(2) As solid fine particle-dispersed dyes to be decolorized at the time of treatment, cyanine dyes, pyrylium dyes and aminium dyes of the general formulas (I) to (IV) described in JP-A-3-138640, Compound Example I-1 ~ I ~ 28, II-1
To II-10, III-1 to III-6, IV-1 to IV-7.

(3) Dyes which are not decolorized during the treatment include tricarbocyanine dyes having a carboxyl group of the general formulas (I) to (II) described in Japanese Patent Application No. 6-227983, and compound examples 1 to 33. Japanese Patent Application No. 6-27929
7, a carboxyl group-containing tetracarbocyan dye represented by formulas (I) to (II);
19. General formulas (1) to 7 described in Japanese Patent Application No. 7-208569.
Cyanine dyes having no acid group of the general formula (3), Compound Examples 1 to 63. Lake-type cyanine dyes of the general formula [1] described in Japanese Patent Application No. 7-135118, Compound Examples No. 1 to No. 3
7.

In addition to these, JP-A-62-299959
JP-A-63-135135, light scattering particles described in JP-A-63-131135, cyanine dye described in JP-A-1-266536, solid fine particle dispersion of oxonol dye described in JP-A-2-282244, 136038
JP-A-7-253
No. 639, a polymer type cyanine dye,
No. 13072, tin-doped indium oxide (IT
O) Powders and Yb ³⁺ compounds described in Japanese Patent Application No. 7-151380 can also be used.

As a method for adding a dye to the light-sensitive material for the purpose of detecting the position of the light-sensitive material, those described in each specification can be used.

The light-sensitive material of the present invention may contain colloidal silica. The colloidal silica has an average particle diameter of 1 to 1000 nm, preferably 5 to 500 nm, more preferably 5 to 100 nm, and its main component is silicon dioxide, which contains alumina or sodium alginate as a minor component. Is also good.

As a specific example of the colloidal silica, Snowtex 2 is a trade name of Nissan Chemical Co., Ltd. (Tokyo, Japan).
0, Snowtex 30, Snowtex C, Snowtex O and the like.

In the light-sensitive material of the present invention, the layer containing colloidal silica includes a surface protective layer, an intermediate layer, a silver halide emulsion layer, an antihalation layer, an undercoat layer, a filter layer,
Although any hydrophilic colloid layer such as a backing layer may be used,
In particular, when pressure resistance is intended, it is preferably contained in a surface protective layer or a silver halide emulsion layer.

The content of the colloidal silica is preferably from 1 to 200 wt%, more preferably from 10 to 100 wt%, based on the weight of the hydrophilic colloid in the hydrophilic colloid layer contained.
Is preferred.

The layer containing colloidal silica preferably contains a plastic polymer latex, if necessary.

Any of the layers of the photographic light-sensitive material of the present invention may contain a polymer latex obtained by polymerizing a water-insoluble monomer.

As such a monomer, for example, acrylates, methacrylates, divinylbenzene, etc. described on page 2, line 2, lines 5 to 17 of JP-A-7-230135 can be used.

In such a polymer latex, the above-mentioned monomer may be copolymerized with another monomer. Examples of the monomer at this time include those described in JP-A-7-230135.
The monomers described on page 2, line 32 to page 4, line 1, line 35 can be used, and among them, acrylic esters, methacrylic esters, vinyl esters, styrenes, and olefins are preferable. Used.

Examples of the polymer latex include, for example, Lx-1 to Lx-21 disclosed in JP-A-7-230135.
Is mentioned. The polymer latex here is also
As mentioned above, means the polymer in the latex.

In the present invention, No. 1 to No. 8 matting agents described in Example 1 of JP-A-6-194779 can be preferably used. Further, preferred compound examples 1 to 9 described in paragraph [0023] of JP-A-6-138572 can be preferably used.

With respect to the size and the like of these matting agents, those having the sizes and amounts described in paragraph [0049] of JP-A-6-194779 can be preferably used. In addition, two or more types of matting agents having a particle size can be mixed and used. Regarding the particle size distribution of the matting agent, monodisperse particles having a variation coefficient of 3 to 30% or polydisperse particles of 30% or more can be used according to the purpose.

[0114] The coating amount of the preferred emulsions of the silver halide photographic light-sensitive material of the present invention, in terms of silver, one side 1 m ² per 2.0
g or less. Preferably, it is 0.5 g or more and 1.7 g or less. More preferably, it is 0.8 g or more and 1.5 g or less.

The coated amount of all gelatin in the hydrophilic colloid layer of the light-sensitive material of the present invention is 2.5 g or less (total coated amount per one side).
And preferably 0.5 g / m ² or more and 2.5 g / m ² or less. Particularly preferably, 1.0 g / m ² or more and 2.1 g / m ² or more.
² or less. In this case, the gelatin coating amount of the protective layer is
It is preferably from 0.2 g / m ^{2 to} 1.0 g / m ² .

In the present invention, the swelling ratio of the light-sensitive material is defined as a value obtained by subtracting the dry film thickness from the film thickness after immersing the light-sensitive material in distilled water at 21 ° C. for 3 minutes. Divided by the dry film thickness value and multiplied by 100, defined as (%) and can be determined. The preferred range of the swelling ratio is 2
It is 0% or more and 220% or less, and more preferably 40% or more and 150% or less.

In general, a silver halide photographic light-sensitive material is coated on a support with a water-soluble coating solution containing a hydrophilic colloid such as gelatin as a binder and then dried in a low-temperature air at a dry-bulb temperature of -10 to 20 ° C. It is cooled and solidified, and then dried at an elevated temperature. Usually, the weight ratio between gelatin and water immediately after coating is about 3000%.

The coating solution is usually mixed with various additives such as a hydrophilic colloid binder, silver halide particles, a surfactant, a plasticizer such as a polymer latex, a gelatin hardener, a dye, a sensitizing dye and a matting agent. It is included.

In the present invention, when the coating solution of the hydrophilic colloid layer is applied and dried, the water content of the coating layer on the side having the silver halide emulsion layer is 100% or less with respect to the dry weight of the binder. It is preferable to dry at a wet bulb temperature of 20 ° C. or lower, preferably 19 ° C. to 10 ° C.

When two or more hydrophilic colloid layers are simultaneously coated and dried (ie, when two or more coating layers are to be dried), the water content is the sum of the water content of all the layers. The binder dry weight represents the sum of the binder dry weight (dry weight) of all layers.

The wet-bulb temperature is the temperature of a water drop in a humid air equilibrium state, and is lower as the humidity of the air is smaller. During the constant-rate drying period of the drying step, the wet-bulb temperature of the drying air is substantially equal to the surface temperature of the applied sample.

[0122] Further, as for the environmental conditions when winding in a roll after coating and drying, it is preferable that the film is wound at an absolute humidity of 1.4 wt% or less, preferably 1.3 to 0.6 wt%.

In the present invention, the product processing of the silver halide photographic light-sensitive material wound up in a roll after coating and drying is performed at an absolute humidity of 1.4% by weight or less, preferably 1.3 to 0.6%.
Processing is preferably performed in an environment of wt%.

The absolute humidity (wt%) represents the state of the humid air, and represents the ratio of the amount of water vapor (kg) in the humid air to the weight (kg) of the dry air in the humid air in percentage. .

The silver halide photographic light-sensitive material is placed in a moisture-proof package, and its opening is heated so that the absolute humidity in the package is 1.4 wt% or less, preferably 1.1 to 0.6 wt%. Sealing with a seal or the like means that the photosensitive material is in equilibrium with the above absolute humidity.

Further, after the processing is completed, the absolute humidity is 1.4 wt.
%, It is particularly preferable that the package is heat-sealed and sealed in the package under the same environment after seasoning in an environment of not more than%.

There are no particular restrictions on the various additives used in the light-sensitive material of the present invention.
No. 9 can be used as described in the following sections.

Items Applicable Locations From the lower right column on page 8, lower right column, page 6 of JP-A-2-68539, from the line of production thereof to the upper right column, page 10, line 12 of JP-A-2-68539. 2. Chemical sensitization method: From page 13, upper right column, item 13 to lower left column, line 16 of the same. 3. Antifoggant / Stable page 10, lower left column, line 17 to page 11, upper left column 7 agent line and page 3, lower left column, line 2 to page 4, lower left column. 4. Spectral sensitizing dyes, page 4, lower right column, line 4 to page 8, lower right column. 5. Surfactant / Electrostatic Protection Line 11 on page 11, upper left column to line 9, Stopper on page 12, upper left column. 6. Matting agent, slip agent, page 12, top left column, line 10 to top right column, line 10. Plasticizer Same as page 14, lower left column, line 10 to lower right column, line 1. 7. Hydrophilic colloid, page 12, line 11, upper right column to line 16, lower left column. 8. Hardener From page 12, lower left column, line 17 to page 13, upper right column, line 6; 9. Supporting substance: From page 7, line 7 to line 20 in the upper right column. Ten. Dyes and mordants, page 13, lower right column, line 1 to page 14, lower left column, line 9.

In the photographic light-sensitive material of the present invention, for example, X-ray photography can be preferably performed using the following phosphors as fluorescent intensifying screens. Blue light-emitting phosphor Y ₂ O ₂ S: Tb, LaOBr: Tb, BaFCl: E
u Green emitting phosphor Gd ₂ O ₂ S: Tb, LaO ₂ S: Tb

As the UV-emitting phosphor, M′-phase YTaO
₄ alone or Gd, Bi, Pb, Ce, Se, Al,
Compounds to which Rb, Ca, Cr, Cd, Nb, etc. are added,
LaOBr to Gd, Tm, Gd and Tm, Gd and Ce, compounds obtained by adding Tb, oxide alone or Ge, Ti, compounds obtained by adding an alkali metal HfZr, Y ₂ O ₃ alone or Gd, was added Eu There are compounds, compounds in which Gd is added to Y ₂ O ₂ S, and compounds in which Gd, Tl, and Ce are used as activators for the base of various phosphors. Particularly preferred compounds include M ′ phase YTa
O ₄ alone or Gd, compounds obtained by adding Sr, LaO
A compound obtained by adding Gd, Tm, Gd and Tm to Br,
It is a compound to which an oxide of HfZr or Ge, Ti, alkali metal or the like is added.

The average particle size of the phosphor is preferably 1 μm or more and 20 μm or less, but can be changed in accordance with the required sensitivity and manufacturing problems. The coating amount is preferably 400 g / mm ² or more and 2000 g / mm ² or less, but cannot be said unconditionally depending on the required sensitivity and image quality. Further, a single intensifying screen may give a particle size distribution from the vicinity of the support to the surface. In this case, it is generally known that particles on the surface are enlarged. The space filling ratio of the phosphor is 40% or more, preferably 60% or more.

In the case of arranging a phosphor layer on both surfaces of a photosensitive material for photographing, the amount of the phosphor applied on the X-ray incident side and the opposite side can be changed. In general, it is known to reduce the coating amount of the intensifying screen on the X-ray incident side, especially when a high-sensitivity system is required for shielding by the intensifying screen on the X-ray incident side.

As the support used for the screen used in the present invention, paper, metal plate, polymer sheet and the like can be mentioned, but a flexible sheet such as polyethylene terephthalate is generally used. The support may be added with a reflecting agent or a light absorbing agent, if necessary, or may be provided as a separate layer on the surface.

Further, if necessary, the surface of the support may be provided with minute irregularities, an adhesive layer for increasing the adhesion to the phosphor layer, or a conductive layer may be provided as an undercoat. Examples of the reflecting agent include zinc oxide, titanium oxide, and barium sulfate. Titanium oxide and barium sulfate are preferable because the emission wavelength of the phosphor is short. The reflecting agent may be present not only in the support or between the support and the phosphor layer, but also in the phosphor layer. When it is present in the phosphor layer, it is preferable to be unevenly distributed near the support.

The binder used in the screen of the present invention includes proteins such as gelatin, polysaccharides such as dextran and corn starch, and natural high molecular substances such as gum arabic; polyvinyl butyral, polyvinyl acetate, polyurethane, polyalkyl acrylate, chloride Synthetic high-molecular substances such as vinylidene, nitrocellulose, fluorine-containing polymers and polyesters, and mixtures and copolymers thereof are also included. Preferred binders include:
As a basic performance, a high transmittance with respect to light emission from the phosphor is cited. In this regard, gelatin, corn starch, acrylic polymers, olefin polymers containing fluorine, polymers containing fluorine-containing olefins as copolymer components, styrene / acrylonitrile copolymers and the like can be mentioned. These binders may have functional groups that are crosslinked by the crosslinking agent. Depending on the required image quality performance, an absorber for the emission from the phosphor may be added to the binder, or a binder having a low transmittance may be used. Examples of the absorbent include a pigment, a dye, and an ultraviolet absorbing compound. The ratio of phosphor to binder is generally from 1: 5 to 50: 1, preferably from 1: 1 to 15: 1 by volume. The ratio between the phosphor and the binder may be uniform or non-uniform in the thickness direction.

The phosphor layer is usually formed by a coating method using a coating solution in which the phosphor is dispersed in a binder solution.
Examples of the solvent for the coating liquid include water or organic solvents such as alcohols, chlorine-containing hydrocarbons, ketones, esters, and ether aromatic compounds, and mixtures thereof.

In the coating solution, a dispersion stabilizer such as phthalic acid, stearic acid, caproic acid and a surfactant of the phosphor particles, and a plasticizer such as a phosphoric acid ester, a phthalic acid ester, a glycolic acid ester, a polyester and a polyethylene glycol are used. An agent may be added.

In the screen used in the present invention, a protective layer can be provided on the phosphor layer. As the protective layer, a method of coating on the phosphor layer or a method of separately forming a protective layer film and laminating is used. In the application method,
It may be applied simultaneously with the phosphor layer, or may be applied after the phosphor layer is applied and dried. The protective layer may be the same substance as the binder of the phosphor layer or a different substance. Examples of the substance used for the protective layer include cellulose derivatives, polyvinyl chloride, melamine, phenol resins, epoxy resins, and the like, in addition to the substances listed for the binder of the phosphor layer. Preferred substances include gelatin, corn starch, acrylic polymers, olefin polymers containing fluorine, polymers containing fluorine-containing olefins as copolymer components, and styrene / acrylonitrile copolymers. The thickness of the protective layer is generally 1 μm
It is preferably at least 20 μm and at most 2 μm and at most 10 μm, more preferably at least 2 μm and at most 6 μm. It is preferable to emboss the surface of the protective layer of the present invention. Further, a matting agent may be present in the protective layer, or a substance having a light scattering property with respect to light emission depending on a desired image,
For example, titanium oxide or the like may be present.

In the protective layer of the screen used in the present invention, a surface slip property may be imparted. Preferred sliding agents include oligomers containing a polysiloxane skeleton and oligomers containing a perfluoroalkyl group.

The protective layer of the present invention may be provided with conductivity. Examples of the conductivity-imparting agent include white and transparent inorganic conductive substances and organic antistatic agents. Preferred inorganic conductive materials include ZnO powder, whiskers, and SnO.
₂ , ITO and the like.

The developing method of the present invention is described in US Pat. No. 5,498,511, JP-A-7-16832, JP-A-8-54712, Japanese Patent Application No. 8-168670, and Japanese Patent Application No. 8-198401. Method can be referred to.

In the developing solution for processing the light-sensitive material of the present invention, it is preferable to use hydroquinone, ascorbic acid, erythorbic acid (a diastereomer of ascorbic acid) and / or a derivative thereof as a developing agent.
Ascorbic acid and / or derivatives thereof used in the present invention are described in U.S. Pat. No. 2,688,549, JP-B-36-17599, JP-A-3-249756, JP-A-4-270343, and the like. Specifically, the compounds described in U.S. Pat. No. 2,688,549 from the first column, first column, line 22 to the first page, second column, line 33, the first page left column of JP-B-36-17599. Compounds described in lines 21 to 26, compounds I-1 to I-8 and II-1 to II-4 described in JP-A-3-249756, page 4, JP-A-4-270343, page 4 The compounds described in the fifth column, lines 40 to 50, can be used. Among these, ascorbic acid or erythorbic acid (a diastereomer of ascorbic acid) and alkali metal salts thereof such as lithium salt, sodium salt and potassium salt are preferable. The developing agent is usually preferably used in an amount of 0.01 mol / l to 0.8 mol / l, and particularly preferably in an amount of 0.1 mol / l to 0.4 mol / l.

In the present invention, it is desirable to use an auxiliary developing agent having superadditivity together with the developing agent. Auxiliary developing agents exhibiting superadditivity include 1-phenyl-3-pyrazolidones auxiliary developing agents. 1-phenyl-3-
As the pyrazolidone auxiliary developing agent, 1-phenyl-
3-pyrazolidone, 1-phenyl-4,4-dimethyl-
3-pyrazolidone, 1-phenyl-4-methyl-4-hydroxymethyl-3-pyrazolidone, 1-phenyl-
4,4-dihydroxymethyl-3-pyrazolidone, 1-
Phenyl-5-methyl-3-pyrazolidone, 1-p-aminophenyl-4,4-dimethyl-3-pyrazolidone,
There are 1-p-tolyl-4,4-dimethyl-3-pyrazolidone, 1-p-tolyl-4-methyl-4-hydroxymethyl-3-pyrazolidone and the like. Of these, 1-phenyl-4-methyl-4-hydroxymethyl-3-pyrazolidone is preferred. In the present invention, when a 1-phenyl-3-pyrazolidone auxiliary developing agent is used in combination with the developing agent, it is preferably used in an amount of 0.001 mol / l to 0.1 mol / l, and especially the latter. Is preferably used in an amount of 0.005 mol / liter to 0.05 mol / liter.

The auxiliary developing agents exhibiting superadditivity include p-aminophenol auxiliary developing agents. As p-aminophenols auxiliary developing agents, N-methyl-
p-aminophenol, N- (β-hydroxyethyl)
-P-aminophenol, N- (4-hydroxyphenyl) -glycine, 2-methyl-p-aminophenol,
There are p-benzylaminophenol and the like.
-Methyl-p-aminophenol is preferred. In the present invention, when a p-aminophenol auxiliary developing agent is used in combination with the developing agent, it is preferably used in an amount of 0.001 mol / l to 0.1 mol / l, and in particular, the latter is used in an amount of 0.1 mol / l. 005 mol / l ~
It is preferably used in an amount of 0.05 mol / l.

The antifoggant added to the developer includes
Azole compounds (for example, benzothiazolium, benzimidazolium, imidazole, benzimidazole, nitroindazole, triazole, benzotriazole, tetrazole, triazine, etc.),
Mercapto compounds (eg, mercaptothiazoles, mercaptobenzothiazoles, mercaptoimidazoles, mercaptobenzimidazoles, mercaptobenzoxazoles, mercaptothiazoles, mercaptooxadiazoles, mercaptotetrazole, mercaptopyrimidines, mercaptotriazines, etc.) .
Particularly, benzotriazoles include 5-methylbenzotriazole, 5-bromobenzotriazole, 5-chlorobenzotriazole, 5-butylbenzotriazole, benzotriazole and the like. As nitroindazoles, 5-nitroindazole, 6-nitroindazole, 4-nitroindazole, 7-nitroindazole, 3-cyano-5-nitroindazole and the like can be used.

In the present invention, JP-B-56-46585 and JP-B-62-4702 are used as silver stain inhibitors in a developer.
No., JP-B-62-4703, U.S. Pat.
No. 5, U.S. Pat. No. 3,318,701, JP-A-58-20
No. 3439, JP-A-62-56959, JP-A-62-25959.
No. 178247, Japanese Unexamined Patent Application Publication No. 1-2209, Japanese Unexamined Patent Application Publication No.
Compounds described in JP-A-503179 and JP-A-5-53257 can be used.

Examples of the fixing accelerator include JP-B-45-357.
No. 54, JP-A-58-122535 and JP-A-58-122.
No. 536, an alcohol having a triple bond in the molecule, a thioether described in U.S. Pat. No. 4,126,459, or a cyclodextran ether derivative which frees an anion, crown ethers, diazacycloundecene or di ( (Hydroxyethyl) butamine and the like. JP-A-7-5654, 6-273898
And the mesoionic compounds described in (1).

As the antifungal means, Japanese Patent Application Laid-Open No. Sho 60-2639
Ultraviolet irradiation method described in No. 39, No. 60-263940
No. 61-131632 using a magnetic field described in
Purification method using the ion-exchange resin described in No.,
Nos. 61-115154, 62-153952, and Japanese Patent Application Nos. 61-63030 and 61-51396 can be used in combination.

Further, LFWest "Water Quality Criter"
ia "Photo.Sci. & Eng., Vol. 9, (1965), MWBeach" Micr
obiological Growth in Motion-picture Processing "S
MTPEJournal Vol. 85 (1976), RDDeegan "Photo Proce
ssing Wash Water Biocides "J.Imaging Tech., Vol.1
0, No. 6 (1984) and JP-A-57-8542,
No. 58143, No. 58-105145, No. 57-13
No. 2146, No. 58-18631, No. 57-9753
No. 0, No. 57-157244, JP-A-6-11858
No. 3, No. 8-248589 and the like can be used in combination.

Further, a washing bath or a stabilizing bath may include RT.
An isothiazoline-based compound described in Kreinman, J. Image.Tech., 10 (6), p. 242 (1984), and an isothiazoline-based compound described in Research Disclosure Vol. 205, No. 20526 (May, 1981). , Vol. 228, No. 22845 (1
The isothiazoline compounds described in Japanese Patent Application No. 61-51396 (April 983, April 1983) and the like can be used in combination as a microbiocide. In addition, "The Chemistry of Bactericidal and Fungicide Protection" by Hiroshi Horiguchi, Mitsui Publishing (Showa 5)
7), "Handbook of antibacterial and antifungal technology" may contain compounds described in Hakuhodo (Showa 61), Japan Society of Antifungal and Antifungal Activities.

Further, it is produced by replenishing the washing or stabilizing bath with water provided with a fungicide according to the treatment.
Part or all of the overflow from the washing or stabilizing bath can be used for diluting a processing solution having a fixing ability, which is a preprocessing step, as described in JP-A-60-235133. .

In the processing system of the present invention, the amount of liquid taken out by the photosensitive material from the developing tank to the fixing tank and from the fixing tank to the washing tank is preferably 0.01 cc to 2 cc per 4 pieces. It is more preferably from 0.1 cc to 1.2 cc, particularly preferably from 0.1 cc to 0.8 cc.

When the washing tank has multiple stages, the carry-out amount from the washing tank to the washing tank is preferably 0.1 cc or more and 2 cc or less, and more preferably 0.1 cc or more and 1.2 cc or less per 4 pieces. Particularly preferably, it is 0.1 cc or more and 0.8 cc or less.

The amount of washing water taken out of the washing tank when entering the drying zone should be 0.1 cc or more and 2 cc per 4 pieces of photosensitive material.
Is preferably 1 cc or less, more preferably 0.5 cc or less.

The light-sensitive material of the present invention is suitable for rapid processing, and the total processing time (Dry to Dry) until it is carried into a developing tank and the drying step is completed is 90 seconds or less, and more preferably 5 seconds or less.
It is preferably from 60 seconds to 60 seconds.

In this case, the development is carried out at 25 to 40 ° C. for 5 to 30 minutes.
Seconds, fixation at 25-40 ° C for 5-40 seconds, washing with water 0-40
Preferably, the drying is performed at a temperature of 40 to 120C for 1 to 30 seconds. The replenishing amounts are preferably 30 to 650 ml for the developing solution, 30 to 650 ml for the fixing solution, and 30 to 50,000 ml for the washing water per 1 m ² of the light-sensitive material.

For details of such processing, reference can be made to the description of the above-mentioned Japanese Patent Application No. 8-168670.

[0158]

The present invention will be described below with reference to examples. Example 1 Emulsion A: Preparation of high aspect ratio (111) AgBr tabular grains 6.0 g of potassium bromide in 1 liter of water, average grain size 1
An aqueous solution containing 37 ml of an aqueous silver nitrate solution (4.00 g of silver nitrate) and 5.9 g of potassium bromide while stirring into a vessel kept at 55 ° C., adding 7.0 g of 15,000 low molecular weight gelatin.
ml was added by the double jet method in 37 seconds. Next, after adding 18.6 g of gelatin, the temperature was raised to 70 ° C., and 89 ml of an aqueous silver nitrate solution (9.80 g of silver nitrate) was added over 22 minutes. Here, 7 ml of 25% ammonia aqueous solution was added, and the mixture was physically aged at the same temperature for 10 minutes, and then 100%
6.5 ml of acetic acid solution was added. Followed by silver nitrate 153
g and an aqueous solution of potassium bromide were added over 35 minutes by the control double jet method while maintaining the pAg at 8.5. Next, 15 ml of 2N potassium thiocyanate solution
Was added. After physical ripening at the same temperature for 5 minutes, the temperature was lowered to 35 ° C.

A transmission electron micrograph (hereinafter referred to as TEM) of a replica of the particles was observed. The shape characteristic values of the particles were as follows. (Total projected area of tabular grains having an aspect ratio of 5 or more / total A)
gX grain projected area sum) × 100 = a ₁ = 95% (average aspect ratio of tabular grains (average diameter / average thickness)) = a ₂ = 10.0 (average diameter of tabular grains) = a ₃ = 1.50 μm (average thickness) = a ₄ = 0.15 μm Monodispersed pure silver bromide tabular grains having a diameter variation coefficient of 18.5% were obtained.

Thereafter, the soluble salts were removed by the sedimentation method. The temperature was raised again to 40 ° C., and 30 g of gelatin, 2.35 g of phenoxyethanol and 0.8 g of sodium polystyrenesulfonate as a thickener were added, and the mixture was adjusted to pH 5.90 and pAg 8.00 with sodium hydroxide and silver nitrate solution.

Emulsion B: Preparation of High Aspect Ratio (111) Tabular Grains with High Silver Iodide Content During the preparation of Emulsion A, during the growth process after physical ripening using ammonia, the emulsion was placed in an aqueous potassium bromide solution. Emulsion B having a silver iodide content of 1.5 mol% and substantially the same shape characteristic values as Emulsion A was prepared by adding potassium iodide equivalent to 1.5% of the total silver amount.

Emulsion C: low aspect ratio (111) AgB
r Preparation of tabular grains 6.0 g of potassium bromide in 1 liter of water, average molecular weight 1
An aqueous solution containing 37 ml of an aqueous silver nitrate solution (4.00 g of silver nitrate) and 5.9 g of potassium bromide while stirring into a vessel kept at 55 ° C., adding 7.0 g of 15,000 low molecular weight gelatin.
ml was added by the double jet method in 37 seconds. Next, after adding 18.6 g of gelatin, the temperature was raised to 70 ° C., and 89 ml of an aqueous silver nitrate solution (9.80 g of silver nitrate) was added over 22 minutes. Here, 15 ml of a 25% aqueous ammonia solution was added, and the mixture was physically aged for 15 minutes at the same temperature, and then 100 ml.
14 ml of a 10% acetic acid solution were added. Followed by silver nitrate 153
g of an aqueous solution of potassium bromide and an aqueous solution of potassium bromide were added by a control double jet method over 55 minutes while maintaining the pAg at 8.1. Next, 15 ml of 2N potassium thiocyanate solution
Was added. After physical ripening at the same temperature for 5 minutes, the temperature was lowered to 35 ° C. a ₁ = 15%, average projected area diameter a ₃ = 1.30μm, thickness a ₄ = 0.29μm, an average aspect ratio a ₂ = 4.5, the diameter variation coefficient 17.0 percent of monodispersed pure silver bromide tabular Particles were obtained.

Thereafter, the soluble salts were removed by the sedimentation method. The temperature was raised again to 40 ° C., and 30 g of gelatin, 2.35 g of phenoxyethanol and 0.8 g of sodium polystyrenesulfonate as a thickener were added, and the mixture was adjusted to pH 5.90 and pAg 8.00 with sodium hydroxide and silver nitrate solution.

(Chemical sensitization) Emulsion A prepared as described above
Was subjected to chemical sensitization while maintaining the temperature at 57 ° C. while stirring. First, 10 ^-4 mol of the following thiosulfonic acid compound-I was added per mol of silver halide, and
0.1 μmol% of AgI fine particles was added to the total silver amount. Three minutes later, 1 × 10 ⁻⁶ mol / mol Ag of thiourea dioxide was added, and the mixture was kept for 22 minutes to perform reduction sensitization. Next, 4-hydroxy-6-methyl-1,3,3
a, 7-Tetraazaindene was added in an amount of 3 × 10 ^-4 mol per mol of silver halide, and the dispersion of sensitizing dye-1 was used as sensitizing dye-1 in an amount of 1.times.1 mol per mol of silver halide. 0 × 10 ^-3 mole equivalent, and the dispersion of sensitizing dye-2 was used as sensitizing dye-2 in an amount of 1.2 per mole of silver halide.
× 10 ⁻⁵ mole equivalent, dispersion of sensitizing dye-3 was converted to sensitizing dye−
As an amount of 3, 2.4 × 10 ^-4 per mol of silver halide
A molar equivalent was added at the same time, and further calcium chloride was added.

Subsequently, sodium thiosulfate was added to the selenium compound-1 in an amount of 6 × 10 ^-6 mol per mol of silver halide.
After the addition corresponding 4 × 10 ^-6 mol per mol of silver halide, of chloroauric acid per mol of silver halide 1 × 10 ^-5 mol equivalent and potassium thiocyanate per mol of silver halide per 2 × 10 ^{- 3} moles were added. Further, nucleic acid (manufactured by Sanyo Kokusaku Pulp Co., Ltd., trade name: RNA-F) was added in an amount of 67 mg per mol of silver halide. After 40 minutes, 1 × 1 of water-soluble mercapto compound-1 was added per mole of silver halide.
It was added in an amount corresponding to ^0-4 mol and cooled to 35 ° C. Thus, the chemical sensitization of the emulsion was completed. Emulsions B and C were similarly optimally subjected to chemical sensitization.

[0166]

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<< Preparation of Dispersion of Sensitizing Dye-1, 2, 3 >>
1 g of each sensitizing dye was added to 50 ml of water at pH 7.0 ± 0.
5, at 2000 to 2000 using a dissolver at 50 to 65 ° C.
The mixture was mechanically dispersed at 2,500 rpm into solid fine particles of 1 μm or less, 50 g of 10% gelatin was added, and the mixture was cooled after cooling.

<< Preparation of Pigment Dispersions A, B, C >> Microlith Blue A3R-K (CIPigment Blue) manufactured by Ciba-Geigy
60), Microlith Blue 4G-K (CIPigment Blue 15:
3), Microlith Violet BK (CIPigment Violet
The dispersion of 37) was sequentially prepared as A, B, and C as follows. 1.8 g of each pigment, 48.8 ethyl acetate
g, the following high-boiling organic solvent-I 1.8 g, and a 72% aqueous solution of sodium dodecylbenzenesulfonate 1.44 g in 5 parts
Ultrasonic dispersion was performed at 0 ° C. Then, 7.2 g of gelatin, 0.72 g of a 3.5% aqueous solution of proxel and 104.4 c of water were used.
c at 50 ° C. and 12000 r with a homogenizer.
The mixture was emulsified and dispersed at pm for 8 minutes. Next, after removing the ethyl acetate by a rotary evaporator, the total amount was 180 g.
Was added to the mixture and the temperature was lowered to obtain a pigment dispersion.

[0169]

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<< Preparation of Pigment Dispersions D, E, and F >>
ent Blue 60, CI Pigment Blue 15, CI Pigment Viol
A solution containing 20 wt% of each of et 23 and 10 wt% of Demol N manufactured by Kao Atlas Co. as a dispersant was dispersed in a sand mill to obtain an aqueous dispersion of a pigment having an average particle diameter of 0.15 μm. E and F.

(Preparation of Dye Emulsion a) The following Dye-I6
0 g, 2,2.8 g of 2,4-diaminophenol, 62.8 g of dicyclohexyl phthalate and 33 of ethyl acetate
3 g were melted at 60 ° C. Next, 65 ml of a 5% aqueous solution of sodium dodecylbenzenesulfonate and gelatin 94
g and water (581 ml) were added, and the mixture was dissolved at 60 ° C. with a dissolver.
The mixture was emulsified and dispersed for 30 minutes. Next, 2 g of methyl p-hydroxybenzoate and 6 l of water were added, and the temperature was lowered to 40 ° C. Next, Asahi Kasei ultrafiltration lab module ACP10
Using 50, the mixture was concentrated until the total amount became 2 kg, and 1 g of methyl p-hydroxybenzoate was added to obtain a dye emulsion a.

[0172]

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<< Preparation of Emulsion Coating Solution >> The following chemicals were added per mole of silver halide to the chemically sensitized emulsion to prepare an emulsion coating solution. 80.6 g of gelatin (including gelatin in the emulsion) 21.5 g of dextran (average molecular weight 39,000) 5.1 g of sodium polyacrylate (average molecular weight 400,000) 5.1 g of sodium polystyrene sulfonate (average molecular weight 60) 10,000 g 1.2 g Potassium iodide 78 mg Hardener 1,2-bis (vinylsulfonylacetamide) ethane (addition amount is adjusted so that the swelling ratio becomes a value of 140%)

Further, the following compounds-I to VII were added in the following amounts. Compound-I 70 mg Compound-II 5.0 g Compound-III 0.58 g Compound-IV 30 mg Compound-V 6.0 mg Compound-VI 0.1 g Compound-VII 0.1 g

[0175]

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The addition amount of the following polymer latex having an active methylene group was adjusted so that the coating amount was 0.8 g / m ² . Core: Styrene / butadiene copolymer (37/63) Shell: Styrene / 2-acetoacetoxyethyl methacrylate (84/16) Core / shell = 50/50 (all numerical values are weight percentages) (to pH 6.1 with NaOH) Adjustment)

<< Preparation of Dye Layer Coating Solution >> A coating solution was prepared so that each component of the dye layer to be coated as the lower layer of the emulsion had the following coating amount.・ Gelatin 0.25 g / m ²・ Additive D (described below) 1.4 mg / m ²・ Sodium polystyrene sulfonate (average molecular weight: 600,000) 5.9 mg / m ²・ Dye dispersion i (as dye solid content) 20 mg / M ² dye dispersion i was prepared as follows.

<< Preparation of Dye Dispersion i >> The following Dye-II was treated as a wet cake without drying, and weighed to a dry solid content of 6.3 g. The following Dispersing Aid V was treated as a 25 wt% aqueous solution, and was added so that the dry solid content was 30 wt% with respect to the dye solid content. Water was added to make a total amount of 63.3 g, and mixed well to form a slurry. 100 zirconia beads with an average diameter of 0.5 mm
ml, put it in a vessel together with the slurry, disperse it for 6 hours with a disperser (1 / 16G sand grinder mill: manufactured by Imex Co., Ltd.), add water so that the dye concentration becomes 8 wt%, and prepare the dye dispersion. Obtained.

The resulting dispersant had a dye solid content of 5 wt.
% And photographic gelatin are mixed so as to be equal to the dye solid content by weight, and an aqueous solution is added as an antiseptic so that the following additive D is 2,000 ppm relative to the gelatin, refrigerated, and refrigerated. saved.

Thus, a dye dispersion i was obtained as a non-elutable solid fine particle dispersed dye having a light absorption maximum at 915 nm. The average particle diameter of the solid fine particles of the dye dispersion i was 0.4 μm.

[0181]

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[0182]

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<< Preparation of Coating Solution for Surface Protective Layer >> A coating solution for the surface protective layer was prepared such that each component of the surface protective layer was applied in the following amount per one side of the support.・ Gelatin 0.33 g / m ²・ Additive D 1.4 mg / m ²・ Sodium polyacrylate (average molecular weight 41,000) 34 mg / m ²・ Additive-1 40 mg / m ²・ Additive-25 .4mg / m ² · additives -3 22.5mg / m ² · additives -4 0.5mg / m ² · matting agent-1 (average particle size 3.7μm) 72.5mg / m ² · compound -IX 4.4 mg / m ² · Compound-X 1.3 mg / m ² Additives and the like used in the above are as follows.

[0184]

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[0185]

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<< Preparation of Coating Solution for Intermediate Layer >> A coating solution for the intermediate layer was prepared such that each component of the intermediate layer had the following coating amount per one side of the support.・ Gelatin 0.33mg / m ²・ Potassium polystyrene sulfonate 20mg / m ²

<< Preparation of Supports-1 and 2 >> A corona discharge treatment was performed on a biaxially stretched polyethylene terephthalate film having a thickness of 175 μm, and the hydrophobic polymer layer was coated with a wire bar coater so as to have the following coating amount. It was coated on both sides and dried at 185 ° C. for 1 minute. The polyethylene terephthalate film used was an uncolored film and a blue-colored film with the dye-I. The uncolored film was a support-1 and a blue-colored film with the dye-I was a support-2.
And The respective transmitted white light densities were 0.03 and 0.14.

[0188] "hydrophobic polymer layer" Butadiene - Styrene copolymer latex of butadiene / styrene weight ratio ^{= 31/69 0.32g / m 2} · 2,4- dichloro-6-hydroxy -s- triazine sodium salt 8. In the 4 mg / m ² * latex solution, the following emulsifying dispersant-A was added in an amount of 0. Contains 4wt%.

[0189]

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<< Hydrophilic Colloid Layer >> Next, the hydrophilic colloid layer was coated on both sides with a wire bar coater so as to have the following coating amount, and dried at 155 ° C. for 1 minute.・ Gelatin 80 mg / m ²・ Polyethyl acrylate 20 mg / m ²・ Coating aid-B (described below) 1.8 mg / m ²・ Dye-III (described below) 40 mg / m ²・ Additive D (described below) 0.27 mg / M ²

<< Method for Preparing Dye-III >> The following Dye-II
I 20 g and carboxymethyl cellulose 1% aqueous solution 20
0 g and 287 g of H ₂ O were mixed and treated at 5,000 rpm for 8 hours in an Eiger mill (Eiger Japan KK) using zirconium oxide (ZrO ₂ ) beads having a diameter of 2 mm. The resulting mixture is filtered and ZrO
_Two beads were removed. This was dispersed in an aqueous gelatin solution to obtain a dye dispersion in the form of solid fine particles of Dye-III. The dye concentration was 12% by weight, and the average particle size of the solid fine particles of the dye was 0.37 μm. The compounds used in the above are shown below.

[0192]

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<< Preparation of Photosensitive Material >> On the support prepared as described above, the dye layer, emulsion layer, intermediate layer and surface protective layer were combined and coated on both sides by a simultaneous extrusion method. The amount of silver applied per side was 1.3 g / m ² . At this time, as shown in Table 1, coating samples were obtained by changing the addition positions and amounts of the pigment dispersions A to F and the dye emulsion a, respectively.

(Evaluation of photographic performance) The photographic material was brought into close contact with both sides using an X-ray orthoscreen HGM manufactured by FUJIFILM Corporation, exposed for 0.05 seconds from both sides, and subjected to X-ray sensitizing. The metrology was performed.

The adjustment of the exposure amount was performed by changing the distance between the X-ray tube and the cassette. After the exposure, the film was subjected to automatic developing machine processing using the following developing solution and fixing solution.

(Processing) Automatic developing machine: Preparation of a concentrate of CEPROS-30 manufactured by FUJIFILM Corporation

<Developer> Parts agent A Potassium hydroxide 330 g Potassium sulfite 630 g Sodium sulfite 255 g Potassium carbonate 90 g Boric acid 45 g Diethylene glycol 180 g Diethylenetriaminepentaacetic acid 30 g 1- (N, N-diethylamine) ethyl- 5-mercaptotetrazole 0.75 g Hydroquinone 450 g 4-Hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone 60 g Water 4125 ml Parts B Diethylene glycol 525 g 3,3'dithiobishydrocinnamic acid 3 g Glacial acetic acid 102.6 g 2-Nitroindazole 3.75 g 1-phenyl-3-pyrazolidone 34.5 g Add water 750 ml Parts C glutaraldehyde (50 wt / wt%) 150 g Potassium bromide 15 g Potassium metabisulfite 105 g 750 ml with water

<Fixing Solution> Ammonium thiosulfate (70 wt / vol%) 3000 ml Ethylenediaminetetraacetic acid disodium dihydrate 0.45 g sodium sulfite 225 g boric acid 60 g 1- (N, N-diethylamine) -ethyl-5 -Mercaptotetrazole 15 g Tartaric acid 48 g Glacial acetic acid 675 g Sodium hydroxide 225 g Sulfuric acid (36N) 58.5 g Aluminum sulfate 150 g Add water 6000 ml pH 4.68

(Preparation of Processing Solution) The above-mentioned concentrated solution of the developing solution was filled in the following containers for each part. In this container, the respective partial containers of the parts agents A, B, and C are connected together by the container itself. The above-mentioned fixer concentrate was also filled in the same type of container.

First, 300 ml of an aqueous solution containing 54 g of acetic acid and 55.5 g of potassium bromide was placed in a developing tank as a starter.
Was added.

The treatment agent container is turned upside down and inserted into the perforation blade of the treatment liquid stock tank mounted on the side surface of the automatic processing machine to break the sealing film of the cap and to remove each treatment agent in the container. Filled the stock tank.

Each of these processing agents was filled in the developing tank and the fixing tank of the automatic processing machine at the following ratios by operating pumps provided in the automatic processing machine.

In addition, every time the photosensitive material was processed into 8 pieces in terms of a 4-cut size, the stock solution of the processing agent and water were mixed at this ratio and replenished into the processing tank of the automatic processing machine.

Developing solution Parts A 51 ml Parts B 10 ml Parts C 10 ml Water 125 ml pH 10.50 Fixer Concentrate 80 ml water 120 ml pH 4.62 The washing tank was filled with tap water.

Further, as a scale inhibitor, 0.4 g of actinobacteria supported on perlite having an average particle diameter of 100 μm and an average pore diameter of 3 μm was covered with a polyethylene bottle (the bottle opening was covered with a 300-mesh nylon cloth. 3 pieces of water and bacteria can be distributed from the cloth), two of them are placed at the bottom of the washing tank and one is placed at the bottom of the washing tank (0.2 liter). Each sunk.

[0206]

(Evaluation of Unexposed Area White Light Transmission Density Contribution) The unexposed sample was subjected to only the above-mentioned fixing and washing, and further,
The film was developed, fixed, washed with water and dried. The white light transmission density was measured using a visual filter of Macbeth densitometer TD-904. The white light transmission density of the support was also measured in the same manner, and the difference between the white light transmission density of the sample and the support was defined as the white light transmission density of the pigment and / or dye. The percentage of the white light transmission density was calculated as the density contribution. Table 1 shows the results.

(Evaluation of Sensitivity) The sensitivity was determined as a common logarithm of the reciprocal of the exposure amount required to obtain a density of fog + 0.3, and the relative value was indicated by setting Sample No. 16 to 1.0. Table 2 shows the results.

(Evaluation of Silver Tone of Developed Silver) The silver tone of the developed silver in the reflected light was observed on the sample subjected to the development treatment, and a sensory evaluation gave a score of 5-1. Scores are given in the order of 1 to 5 to give favorable color tones. Table 2 shows the results.

(Screen dirt test) Screen cleaner test A suitable amount of a screen cleaner manufactured by FUJIFILM Corporation was applied to an X-ray orthoscreen HGM manufactured by FUJIFILM Corporation, and adhered to the sample before development processing. Let 10kg at 40 ° C for 3 days
Was applied. Thereafter, the screen surface was wiped with absorbent cotton moistened with a screen cleaner, and the degree of dirt was visually evaluated. Table 2 shows the results. The evaluation of the screen staining property for the intensifying screen is as follows.

Evaluation of contamination ◎: No adhesion. ：: Almost no adhesion. X: There is adhesion.

Evaluation of Residual Color The photosensitive material was cut into a size of 30.5 cm × 25.4 cm, and the above-mentioned treatment was carried out for 30 seconds with a washing water of 5 ° C. and a dry to dry process. Was visually evaluated according to the following criteria. Table 2 shows the results. A: Almost no residual color. ：: Slight residual color but not bothersome. Δ: Remains color but practically acceptable. ×: Many residual colors are not possible.

[0213]

[Table 1]

[0214]

[Table 2]

Table 2 shows that the light-sensitive material of the present invention is excellent in the reflection silver tone of developed silver. In addition, there is no residual color, and it can be seen that improvement can be achieved in a screen cleaner test by selecting the addition positions of dyes and pigments and the types of the compounds. In contrast, a sample to which no dye or pigment is added, or a sample in which the contribution of the white light transmission density by the dye or pigment is out of the range of the present invention, has a poor silver tone. Samples having a silver halide composition outside the scope of the present invention have a residual color, and samples having a tabularization degree outside the scope of the invention have a remarkable decrease in sensitivity. In addition, among the samples of the present invention, the sample
Nos. 1 to 7 and Nos. 17 to 22 were more excellent in the recognizability of the image after the development processing than the samples Nos. 13 to 15.

Example 2 An evaluation was conducted in the same manner as in Example 1 except that the development processing conditions described below were used using the sample of Example 1, and the same tendency was shown according to the structure of the sample. Similarly to the above, it was found that the light-sensitive material of the present invention was excellent in the development reflection silver tone.

(Preparation of Concentrated Developing Solution) Concentrated developing solution A having the following formulation and using sodium erythorbate as a developing agent was prepared. Diethylenetriaminepentaacetic acid 8.0 g Sodium sulfite 20.0 g Sodium carbonate monohydrate 52.0 g Potassium carbonate 55.0 g Sodium erythorbate 60.0 g 4-Hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone 13.2 g 3,3'-diphenyl-3,3'-dithiopropionic acid 1.44 g diethylene glycol 50.0 g

[0218]

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Add water to make 1 liter. Adjust to pH 10.1 with sodium hydroxide.

(Preparation of developer replenisher)
It was diluted twice and used as a developing replenisher.

(Preparation of developing mother liquor) A developing solution having a pH of 9.5 was prepared by diluting 2 liters of the above concentrated developing solution to 4 liters with water and adding 55 ml per liter of a diluted developing solution of a starter solution having the following composition. Used as mother liquor. Starter liquid Potassium bromide 11.1 g Acetic acid 10.8 g Add water to make up to 55 ml.

(Preparation of concentrated fixing solution) A concentrated fixing solution having the following formulation was prepared. Water 0.5 L Ethylenediaminetetraacetic acid dihydrate 0.05 g Sodium thiosulfate 200 g Sodium bisulfite 98.0 g Sodium hydroxide 2.9 g Adjust the pH to 5.2 with NaOH, and add water to make 1 L.

(Preparation of Fixing Replenisher)
It was diluted twice and used as a fixing replenisher.

(Preparation of fixing mother liquor) 2 L of the above concentrated fixing solution was diluted with water to 4 L. pH was 5.4.

[0225] Using the above developer mother liquor and fixing the mother liquor (processing step of the photosensitive material), and the developer replenisher and the fixing replenisher to the processing photosensitive material 1 m ² per 65ml supplemented with. In addition,
Tap water was used as washing water. Process Temperature Processing time Current image 35 ° C 8 seconds Fixed 35 ° C 8 seconds Rinse 25 ° C 7 seconds Dry 55 ° C 7 seconds Total 30 seconds

Example 3 In Example 1, the following tellurium compound-1 was used during chemical sensitization.
Was prepared in the same manner as above except that 4 × 10 ⁻⁶ mol per mol of silver halide was added together with the selenium compound-1, and the same evaluation as in Example 1 was carried out. It was confirmed that the light-sensitive material of the present invention was excellent in the reflection silver tone of developed silver and the like.

[0227]

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[0228]

According to the present invention, the blackness of transmission and reflection of image silver is improved, the residual color is small, the sensitivity is high and the silver covering power is high, and the stainability on fluorescent intensifying screens and the like can be improved. In addition, it is possible to provide a silver halide photographic material capable of improving the recognizability of an image.

Claims (6)

[Claims] Claims 1. A blue-dyed medical silver halide photographic material having at least one silver halide emulsion layer on a support, wherein the silver halide grains contained in the silver halide emulsion layer are 50% or more of the total projected area is occupied by tabular grains having an aspect ratio of 5 or more, and the tabular grains have a composition of silver iodobromide or silver bromide having an average silver iodide content of 1 mol% or less. Sensitized with a selenium compound and / or a tellurium compound, and in the silver halide emulsion layer and / or in a hydrophilic colloid layer above the silver halide emulsion layer,
The pigment and / or dye having a maximum absorption wavelength between 650 nm is contained, and the content of the pigment and / or dye is the pigment and / or dye in the unexposed portion white transmission density after the development processing. A silver halide photographic light-sensitive material characterized in that the dye contributes 50% or more. 2. The silver halide photographic material according to claim 1, wherein said pigment contains an anthraquinone pigment. 3. A silver halide photographic material according to claim 1, wherein said pigment contains a metal phthalocyanine pigment and a dioxazine pigment. 4. The halogen according to claim 1, wherein the pigment and / or dye is contained in a hydrophilic colloid layer above the silver halide emulsion layer and below the surface protective layer. Silver halide photographic material. 5. The silver halide photographic light-sensitive material according to claim 1, wherein the contribution of said pigment and / or dye is at least 80% of the unexposed area white light transmission density after development processing. 6. The silver halide photograph according to claim 1, wherein the support is not dyed, and when an undercoat layer is present on the support, the undercoat layer is not dyed. Photosensitive material.