JPH0943772A - Silver halide photographic sensitive material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a silver halide photographic sensitive material having excellent definition and ameliorated pressure fogging, etc. SOLUTION: This silver halide photographic sensitive material has at least one layer of photosensitive silver halide emulsion layers and at least one layer of nonphotosensitive layers on one surface of a paper base formed by coating both surfaces of base paper with resin coating layers. The resin coating layers on the side coated with the emulsion layers of the paper base consist of laminated layers of >=2 layers varying in the contents of white pigments. the average content of the white pigments incorporated in the resin coating layers is >=16wt.%, the content of the white pigments in the resin coating layer nearest the emulsion layers is 1 to 25wt.% and the silver halide content in the emulsion layers is >=95mol%. At least one layer of the laminated resin coating layers consist of a polyolefin resin or polyester resin and at least one layer consist of resins exclusive of the polyolefin resin. The average content of the white pigments incorporated in the laminated resin coating layers is >=18wt.%.

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 light-sensitive material, and more particularly to a silver halide photographic light-sensitive material having excellent rapid processing suitability and sharpness, and having improved pressure fog, bending resistance and white background. Regarding

[0002]

2. Description of the Related Art With the spread of color photographic light-sensitive materials, the demand for high-quality images is increasing. Under such circumstances, studies on color reproducibility, tone reproducibility, sharpness improvement, density unevenness improvement, and the like have been widely conducted in color print photosensitive materials.

Irradiation and halation are generally known as factors affecting sharpness. The former is brought about by the scattering of incident light by oil droplets such as silver halide grains and couplers dispersed in a gelatin film, and its degree mainly depends on the gelatin amount, silver halide amount, and oil droplet amount. The latter depends on the degree of light reflection from the support, and on the reflectance and refractive index of the support.

Dye improvements have been made to prevent irradiation. For example, JP-A-50-1451
No. 25, No. 52-20830, No. 50-111641.
No. 61, No. 61-148448, No. 61-151650.
No. 62-275562, No. 62-283336, etc., describes improvements.

As for halation prevention, a method of providing an antihalation layer is known. For example, JP-A-55-33172, JP-A-59-193447 and JP-A-62.
Improvements are described in, for example, Japanese Patent No. 33,448.

However, in these methods, the sharpness is remarkably lowered together with the improvement of the sharpness, and it is difficult to improve the sharpness while maintaining the practically sufficient sensitivity only by such means.

Improvements to the support have also been investigated. As a support for color print light-sensitive materials, in recent years a water-resistant support prepared by laminating polyolefin on the surface of a base paper has been used for speeding up development processing.For sharpness and a white background, a polyolefin layer on the photographic emulsion side is used. Is a white pigment such as titanium oxide dispersed therein. In order to improve the sharpness, as shown in JP-A-54-46035, JP-A-64-18144, JP-A-2-71256 and the like, a white pigment is added to the polyolefin resin layer on the side where the photographic emulsion is coated. Although it was effective to combine the technique of using a paper support filled with a large amount of polyethylene, it has drawbacks such as deterioration of the smoothness of the polyethylene layer and deterioration of the adhesion between the polyethylene layer and the emulsion layer. When the silver halide photographic light-sensitive material is subjected to pressure such as nail breakage or scratches by protrusions, the silver halide grains in the unexposed area are developed, so-called pressure fog phenomenon easily occurs. I understood.

Further, when a paper support in which a large amount of white pigment is filled in the polyolefin resin layer on the side where the photographic emulsion is applied is used, and when the finished silver halide photographic light-sensitive material is viewed under a fluorescent lamp, white background and color density Iridescent stripes were found on the surface in the lower part of. This is because the bright lines of the fluorescent lamp appear to interfere with the reflected light on the gelatin surface of the silver halide photographic light-sensitive material and the reflected light on the surface of the resin coating layer inside, and the most important item for photographic printing paper. It is difficult to use a paper support in which a large amount of white pigment is filled in the polyolefin resin layer on the side where the photographic emulsion is applied, because it has a fatal defect in one white background.

Further, it has been found that in a silver halide photographic light-sensitive material using a paper support in which a polyolefin resin layer on the emulsion coating side is filled with a large amount of white pigment, cracks are likely to appear on the silver halide emulsion coating surface due to bending. It was

In recent years, color development processing has become simpler and faster, and it is desired that the processing can be carried out quickly and the processing is stable.

From the viewpoint of accelerating the development processing time, silver bromide, silver chlorobromide and silver chloride containing substantially no silver iodide are used as silver halide emulsions applied to color photographic paper. Came. It is known that a silver halide emulsion having a higher silver chloride content has a higher developability and is advantageous for rapid processing. The amount of gelatin used as a binder has also been reduced for speeding up.

However, in a silver halide photographic light-sensitive material having a silver halide emulsion layer containing a silver halide emulsion having a high silver chloride content, pressure fog is more likely to occur, and when the amount of gelatin is reduced, the emulsion coated surface becomes The problem was that cracks tended to occur.

If the pressure fog is large, cracks occur on the emulsion-coated surface, and there is a problem with the white background, the product will have fatal defects. Therefore, improvement of the pressure fog, curl, and white background is strongly desired. .

[0014]

Accordingly, the first aspect of the present invention is as follows.
The purpose of is to provide a silver halide photographic light-sensitive material having excellent sharpness. A second object of the present invention is to provide a silver halide photographic light-sensitive material in which pressure fog and cracks on the emulsion coated surface are improved. A third object of the present invention is to
Another object of the present invention is to provide a silver halide photographic light-sensitive material having an improved white background.

[0015]

The objects of the present invention are: 1) At least one photosensitive silver halide emulsion layer and at least one photosensitive silver halide emulsion layer on one side of a paper support having a resin coating layer coated on both sides of a base paper. In a silver halide photographic light-sensitive material having one non-light-sensitive layer, the resin coating layer on the silver halide emulsion layer-coated side of the paper support is composed of two or more layers having different contents of white pigment, The average content of the white pigment contained in the two or more resin coating layers is 16% by weight or more, and the content of the white pigment in the resin coating layer closest to the silver halide emulsion layer is 1 to 25% by weight. And a silver halide photographic light-sensitive material characterized in that the silver halide emulsion layer contains a silver halide emulsion having a silver chloride content of 95 mol% or more, 2) a resin coating comprising a laminate of two or more layers In layers,
At least one layer of the resin coating layer is made of polyolefin resin or polyester resin, and at least one layer of the resin coating layer is made of resin other than polyolefin resin. Material, 3) The silver halide photographic light-sensitive material as described in 1) or 2) above, wherein the white pigment contained in the two or more resin coating layers has an average content of 18% by weight or more. Achieved by

The details of the present invention will be described below.

The support used in the present invention is a paper support having a resin layer on both sides, based on paper, and has a resin layer on the side on which a silver halide emulsion layer is coated (hereinafter referred to as a front resin layer). ) Is a laminate of two or more layers and is a paper support containing a white pigment.

The base paper used in the paper support of the present invention can be selected from the raw materials generally used for photographic printing paper. Examples thereof include natural pulp, synthetic pulp, a mixture of natural pulp and synthetic pulp, and various raw materials for laminated paper. Generally, natural pulp mainly composed of softwood pulp, hardwood pulp, mixed pulp of softwood pulp and hardwood pulp, etc. can be widely applied. Although any neutral paper, acidic paper or the like may be used, it is preferable to use a photographic printing paper grade base paper, and particularly a photographic grade neutral paper. The thickness of the paper is preferably 40 μm to 250 μm.

Further, the support may be blended with additives such as a sizing agent, a fixing agent, a tension enhancer, a denaturant, an antistatic agent, a dye and an antifoggant, which are generally used in papermaking, Further, a surface sizing agent, a surface tension agent, an antistatic agent, or the like may be appropriately applied to the surface.

In the support used in the present invention, a resin coating layer (hereinafter
As a method of applying a back resin layer), a method of laminating a polyolefin resin or a polyethylene terephthalate resin is known.

The olefin resin mainly used for the laminate can be selected from ethylene, propylene, other α-olefins and a mixture of at least two kinds thereof. Among them, the widely used polyolefin resin is low density polyethylene, high density polyethylene or a mixture thereof.

Generally, a resin laminate can be formed by melt extrusion coating a resin composition on a support. In order to carry out this melt extrusion coating method, usually, a resin composition is melt extrusion coated in a form of a single layer or a plurality of layers from a slit die of an extruder on a running support. Usually, the melt extrusion temperature is preferably 200 to 250 ° C.

The thickness of the resin coating layer is not particularly limited and is usually 15 to 60 μm.

In the paper support used in the present invention, the surface resin layer is a laminate of two or more layers having a white pigment, and the resin used for the lamination may be a polyolefin resin.
Although it may be a resin other than the polyolefin resin, at least one layer of the laminate is a resin layer formed of a polyolefin resin or a polyester resin, and at least one layer is formed of a resin other than the polyolefin resin. It is preferably a layer. The resin layer formed of a polyolefin resin or a polyester resin is preferably a resin layer formed of a polyolefin resin.

Examples of the polyester resin useful in the present invention include polyethylene terephthalate and modified polyester having polyethylene terephthalate as a main structure (hereinafter referred to as modified polyester). The modified polyester comprises polyethylene terephthalate and a polyester part which occupies most of the main chain and a modified part. The main chain constituent molecule of the modified portion is terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, as an ester bond dibasic acid,
1,5-naphthalenedicarboxylic acid, 1,4-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, p-
Xylidene dicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, adipic acid, sebacic acid, 5-alkali metal sulfoisophthalic acid, 4-alkali metal sulfo-2,6
-Naphthalenedicarboxylic acid and the like.

As the ester-bonded glycol (diol), ethylene glycol, propion glycol, 1,4-butanediol, 1,4-hexylenediol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol (number average molecular weight 300 ~ 30,000), polypropylene glycol (number average molecular weight 300 to 30,000)
0), and the like.

Preferably, the dibasic acid is terephthalic acid, isophthalic acid, 4-metal sulfo-2,6-naphthalene dicarboxylic acid, 5-metal sulfo-isophthalic acid, 4-
Metal sulfo-2,6-naphthalenedicarboxylic acid or the like is used, and as glycols, ethylene glycol, propylene glycol, 1,4-cyclohexanedimethanol,
Polyethylene glycol (number average molecular weight 300 to 30,
000) and the like are used.

The metal ion of the metal sulfo substituent is sodium, potassium, lithium, cesium, etc., preferably sodium.

The modified portion of the modified polyester useful in the present invention is 50 mol% or less based on the total polyester bonds, and when it exceeds 50 mol%, the physical properties as a support, such as mechanical strength, glass transition point and water resistance. The properties are deteriorated and it becomes difficult to use as a support. It is preferably 40 mol% or less, and particularly preferably 30 mol% or less.

The compound having an alkali metal sulfo group in the modified portion of the modified polyester is 2 for all ester bonds.
It is preferably contained in a proportion of from 10 to 10 mol%, and has excellent adhesiveness to the emulsion layer, the other resin layer and the base paper. When this compound having an alkali metal sulfo group, for example, 5-sodium sulfoisophthalic acid is 2 mol% or less, it is almost the same as polyethylene terephthalate, and the meaning of modification is weakened. Further, if it is 10 mol% or more, the water absorption becomes large, the adhesiveness between the paper support and the resin deteriorates, and there is a risk of peeling during the photographic processing. Also, the water resistance of the photographic support becomes poor and the photographic support is also used. Problems arise as a support. It is preferably 2 to 7 mol%, and particularly preferably 3 to 6 mol%.

For the modified portion of the modified polyester, it is also preferable to use polyethylene glycol and / or a saturated aliphatic dicarboxylic acid such as adipic acid together with the above-mentioned sulfo compound.

The modified polyester resin useful in the present invention can be synthesized by a conventionally known polyester production method. For example, in the esterification reaction, either an acid component can be directly esterified with a glycol component or an acid component can be used as a dimethyl ester with glycol by a transesterification method. At this time, if necessary, a polyester can be polymerized and synthesized by using a transesterification reaction catalyst for the esterification and a polymerization reaction catalyst such as antimony oxide in the polymerization reaction. Regarding the polyester constituent components and the synthetic method described above, for example, Polymer Experimental Science No. 5
Volume "Shijuku-shuku and Shigekaku" (Kyoritsu Shuppan, 1980) No. 10
Pages 3-136, or "Synthetic Polymer V" (Asakura Shoten,
(1971) Pages 187 to 286 can be referred to.

The specific method for synthesizing the modified polyester is as follows:
U.S. Pat. No. 4,217,441, JP-A-5-2101
No. 19, the modified polyesters useful in the present invention can be synthesized by these methods.

Polyesters (including modified polyesters) useful in the present invention should have sufficiently high molecular weights. Generally, the molecular weight of a polymer compound such as polyester is expressed as an intrinsic viscosity (for example, edited by the Chemical Society of Japan,
Standard Chemistry Dictionary, page 24, 1991, published by Maruzen)
The intrinsic viscosity of the polyester used in the present invention is 0.50.
The above is necessary, preferably 0.53 or more, particularly preferably 0.55 or more. When the intrinsic viscosity of the polyester is less than the above, the resin becomes white and becomes brittle after melt extrusion. Also, if melt extrusion is performed with water contained, the intrinsic viscosity will drop extremely, so special care must be taken when drying before melting, and even if the intrinsic viscosity is sufficiently high, hydrolysis may occur during melting. is there. Drying of resin chips is 10
^It is usually performed under a vacuum of about ^-3 Torr at about 150 ° C.

The polyolefin resin and the polyester resin are formed into a layer by melt-extruding and coating the molten resin on a paper support. This melt extrusion coating method, the resin composition is melted to a predetermined temperature in an extruder,
It is melt-coated from a die slit on a running paper support (supported by a roll on the back side of the paper support at the coating position). It may be a single layer applied or it may be multiple layers from multiple slits.

Generally, the melt extrusion temperature is preferably 200 to 350 ° C.

Resins other than the polyolefin resin of the present invention include the above-mentioned polyester resins, polyether resins such as polyethylene glycol, polyoxymethylene and polyoxypropylene, urethane resins such as polyester-based urethane and polyether-based urethane, and polycarbonate resins. , Polystyrene resins, electron beam curable resins, cellulose nitrate, cellulose derivative resins such as cellulose triacetate, and the like, and they may be used alone or in combination. Preferred resins include polyethylene terephthalate resin, modified polyester resin, electron beam curable resin and the like, and these may be used alone or may be used as a main component mixed with the above other resins. Electron beam curable resins are preferred.

As the electron beam-curable compound of the electron beam-curable resin useful in the present invention, any compound that can be cured by electron beam irradiation can be used. In the present invention, compounds that can be cured by electron beam irradiation that can be used include, for example, JP-B-60-17104 and JP-A-60-1.
The electron beam-curable compounds described in JP-A No. 26649 or JP-A No. 2-157747 and the like include electron beam-curable monomers and oligomers.

The electron beam curable monomers or oligomers useful in the present invention include two or more carbon atoms in one molecule.
An unsaturated compound containing a carbon double bond (for example, an acrylic or methacrylic oligomer, a polyfunctional acrylic or methacrylic monomer) is used, and 1 is used as a monomer used by diluting the above curable monomer.
An unsaturated compound having at least a carbon-carbon double bond in the molecule (for example, a monofunctional acrylic monomer, a methacrylic monomer, a vinyl monomer, etc.) is used.

Examples of the acrylic and methacrylic oligomers include polyurethane acrylic ester or methacrylic ester, polyether alcohol acrylic ester or methacrylic ester, bisphenol A acrylic ester or methacrylic ester, and polyester malein. Examples thereof include acid esters and fumaric acid esters. Further, as the polyfunctional acrylic monomer and the methacrylic monomer,
1,6-hexanediol diacrylate, neopentyl diacrylate, diethylene glycol diacrylate, butadiene acrylate, diethylene glycol dimethacrylate, etraethylene glycol diacrylate, glycerol trimethacrylate, stearyl acrylate, polyethylene glycol diacrylate,
Butoxyethyl acrylate, 1,4-butanediol diacrylate, ethylene glycol dimethacrylate, glycyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, phenoxy. Ethyl acrylate, cyclohexyl acrylate, benzyl acrylate, N, N-dimethylaminoethyl acrylate, N, N-diethylaminoethyl methacrylate, ethylene oxide modified phenoxyphosphoric acid acrylate, neopentyl glycol diacrylate, isocyanuric acid diacrylate, isocyanuric acid triacrylate, Trimethylolpropane triacrylate, trimethylolpropane Bread trimethacrylate,
Propylene oxide-modified trimethylolpropane polyacrylate, glycyl methacrylate, 1,3-bis (N, N-diepoxypropylaminomethyl) cyclohexane, pentaerythritol pentaacrylate and the like can be mentioned. As the monofunctional acrylic monomer and methacrylic monomer, and vinyl monomer, styrene, N-vinylpyrrolidone, acrylic acid ester of polyoxyethylene phenyl alcohol, 2-
Examples thereof include ethylhexyl acrylate.

As a coating method for these, a roller coating method may be used, or alternatively, a general method used for coating a sheet, for example, a bar coating method, an air doctor coating method, a plate coating method or a squeeze coating method. Any of an air knife method, a reverse roll coating method, a transfer coating method and the like may be used.
A fountain coater or slit orifice coater system can also be used.

The electron beam irradiation used in the present invention is not particularly limited in the electron beam irradiation device, and generally, as such an electron beam accelerator for electron beam irradiation, a curtain beam which is relatively inexpensive and can obtain a large output. The system type is effectively used. The acceleration voltage during electron beam irradiation is preferably 100 to 300 kV, and the absorbed dose is 0.5 to 10 kV.
It is preferably Mrad.

The thickness of each of the polyolefin resin coating layer forming the laminated resin coating layer and the resin coating layer of a resin other than the polyolefin resin is not particularly limited and is usually 5 to 60 μm.

In the present invention, the surface resin coating layer is composed of two or more layers having different contents of white pigments, preferably at least one polyolefin resin or polyester resin forming the laminated resin coating layer. The content rate of the white pigment contained in the resin coating layer is different from the content rate of the white pigment contained in the resin coating layer formed of at least one resin other than the polyolefin resin. The average content of the white pigment contained in the resin coating layer is 16% by weight or more, and the content of the white pigment in the resin coating layer closest to the silver halide emulsion layer is 1 to 1%.
It is 20% by weight.

Here, the average content of the white pigment contained in the two or more resin coating layers of the present invention means the content of all the white pigments contained in the two or more resin coating layers to be two layers. It is divided by the total weight of the resin coating layer described above, and contains 16% by weight or more of the white pigment in the entire resin coating layer of the laminate. It is preferably 18% by weight to 60% by weight. 1
If it is less than 6% by weight, a photographic printing paper support having high sharpness cannot be obtained.

The content of the white pigment in the resin coating layer closest to the silver halide emulsion layer is 1 to 25% by weight. If the content exceeds 25% by weight, pressure fog is likely to occur and the curl is also adversely affected, and white background interference fringes are significantly generated under a fluorescent lamp. If the content is less than 1% by weight, sharpness is greatly deteriorated. The preferred white pigment content is 5 to 25% by weight.

The content of the white pigment other than the resin coating layer closest to the silver halide emulsion layer is the content of the total white pigment of the resin coating layer closest to the silver halide emulsion layer and the other resin coating layers. The content may be 16% by weight or more.

As the white pigment to be used, for example, rutile type titanium dioxide, anatase type titanium dioxide, barium sulfate, barium stearate, silica, alumina, zirconium oxide, kaolin and the like can be used. Titanium dioxide is preferred.

The titanium dioxide may be either anatase type or rutile type, but anatase type titanium dioxide is preferred when whiteness is prioritized, and rutile type titanium dioxide is preferred when sharpness is emphasized. Anatase type titanium dioxide and rutile type titanium dioxide may be blended and used in consideration of both whiteness and sharpness, or anatase type titanium dioxide may be added to another layer in a layer having a resin coating layer composed of multiple layers. Rutile titanium dioxide may be used.

The titanium dioxide used is generally surface-treated with an inorganic substance such as aluminum oxide hydroxide or silicon oxide in order to suppress the activity of titanium dioxide and prevent yellowing, polyhydric alcohol, polyhydric alcohol. Amine, metal soap,
It is possible to use those whose surface is treated with an organic substance such as alkyl titanate or polysiloxane, and those whose surface is treated with an inorganic or organic treating agent in combination. The amount of surface treatment is 0.2% by weight to 2.0% by weight of an inorganic substance based on titanium dioxide,
The organic substance is preferably 0.1% by weight to 1.0% by weight. The particle size of titanium dioxide is preferably 0.1 μm to 0.4 μm.

In order to disperse and mix the white pigment in the resin, a three roll mill (three roll mill), a two roll mill (two roll mill), a cowles dissolver, a homomixer, a sand grinder, an ultrasonic disperser and the like are used. be able to.

If necessary, after coating or curing, the surface may be smoothed by a mirror surface roll or surface matted by a mat roll such as a silk roll.

The center surface average roughness (SRa) of the support is preferably 0.15 μm or less, and more preferably 0.12 μm or less, because the glossiness is better. In addition, in order to improve the whiteness by adjusting the spectral reflection density balance of the white background after treatment in the water-resistant resin containing white pigment of the reflective support or in the applied hydrophilic colloid layer, trace amounts of ultramarine blue, oil-soluble dyes, etc. It is preferable to add a bluing agent and a reddishing agent.

The halogen composition of the silver halide grains according to the present invention is based on silver chlorobromide containing 95% or more of all silver halides constituting the silver halide grains and containing substantially no silver iodide. Need to be The preferred halogen composition of the silver halide grains is 97 mol% or more, more preferably 98 to 99.99, of the total silver halide constituting the silver halide.
Mol% is silver chloride.

To obtain the silver halide emulsion according to the present invention, a silver halide emulsion having a portion containing a high concentration of silver bromide is particularly preferably used. In this case, the portion containing a high concentration of silver bromide may be epitaxy-bonded to silver halide emulsion grains, a so-called core-shell emulsion, or may be formed only partially without forming a complete layer. May simply have regions with different compositions. Further, the composition may change continuously or discontinuously. It is particularly preferable that the portion where silver bromide exists at a high concentration is the top of crystal grains on the surface of silver halide grains.

In order to obtain the silver halide emulsion according to the present invention, it is advantageous to contain heavy metal ions. Heavy metal ions that can be used for such purposes include iron,
Iridium, platinum, palladium, nickel, rhodium,
Examples include Group 8 to 10 metals such as osmium, ruthenium, and cobalt; Group 12 transition metals such as cadmium, zinc, and mercury; and ions of lead, rhenium, molybdenum, tungsten, gallium, and chromium. Among them, metal ions of iron, iridium, platinum, ruthenium, gallium and osmium are preferred.

These metal ions can be added to the silver halide emulsion in the form of salt or complex salt.

When the heavy metal ion forms a complex, its ligand or ion is cyanide ion, thiocyanate ion, cyanate ion, chloride ion, bromide ion, iodide ion, nitrate ion, carbonyl. , Ammonia, and the like. Among them, cyanide ion, thiocyanate ion, isothiocyanate ion, chloride ion, bromide ion and the like are preferable.

In order to add a heavy metal ion to the silver halide emulsion according to the present invention, the heavy metal compound is added to the physical layer before the formation of silver halide grains, during the formation of silver halide grains and after the formation of silver halide grains. It may be added at any place during each step during aging. In order to obtain a silver halide emulsion satisfying the above-mentioned conditions, a heavy metal compound can be dissolved together with a halide salt and continuously added during the whole or part of the grain forming process.

The amount of the above heavy metal ions added to the silver halide emulsion is 1 × 10 ^-9 per mol of silver halide.
Mol or more and 1 × 10 ^-2 mol or less, particularly preferably 1 × 10 ⁻² mol or less.
It is preferably at least 10 ^-8 mol and not more than 5 10 ^-5 mol.

The silver halide grains according to the present invention may have any shape. One preferred example is
It is a cube having a (100) plane as a crystal surface. U.S. Pat. Nos. 4,183,756 and 4,225,6
66, JP-A-55-26589, JP-B-55-42
737 and The Journal of Photographic Science (J. Photogr. Sci.) 2
1, 39 (1973), etc., particles having an octahedral, tetradecahedral, dodecahedral or the like shape can be prepared and used. Further, particles having a twin plane may be used.

As the silver halide grains according to the present invention, grains having a single shape are preferably used, but it is particularly preferable to add two or more kinds of monodispersed silver halide emulsions to the same layer.

The grain size of the silver halide grains according to the present invention is not particularly limited, but in view of other photographic properties such as rapid processability and sensitivity, it is preferably 0.1 to 1.2 μm.
m, and more preferably 0.2 to 1.0 μm.

This particle size can be measured using the projected area of the particle or an approximate diameter. If the particles are of substantially uniform shape, the particle size distribution can be fairly accurately expressed as a diameter or projected area.

The grain size distribution of the silver halide grains of the present invention is preferably monodisperse silver halide grains having a coefficient of variation of 0.22 or less, more preferably 0.15 or less, and a coefficient of variation of 0 is particularly preferred. It is to add two or more kinds of monodisperse emulsions of 0.15 or less to the same layer. Here, the coefficient of variation is a coefficient representing the width of the particle size distribution, and is defined by the following equation.

Coefficient of variation = S / R (where S is the standard deviation of the grain size distribution and R is the average grain size.) The grain size referred to here is the diameter of spherical silver halide grains. Further, in the case of a particle having a shape other than a cube or a sphere, it represents the diameter when the projected image is converted into a circular image having the same area.

As the apparatus and method for preparing the silver halide emulsion, various methods known in the art can be used.

The silver halide emulsion according to the present invention may be obtained by any of the acidic method, the neutral method and the ammonia method. The particles may be grown at one time or may be grown after seed particles have been made. The method of producing the seed particles and the method of growing them may be the same or different.

The method of reacting the soluble silver salt and the soluble halide salt may be any of a forward mixing method, a back mixing method, a double mixing method, a combination thereof, etc., but the one obtained by the double mixing method. Is preferred. Further, as one type of the double jet method, a pAg controlled double jet method described in JP-A-54-48521 can be used.

Further, JP-A-57-92523 and 57-57.
No.-92524, etc., a device for supplying an aqueous solution of a water-soluble silver salt and a water-soluble halide salt from an addition device disposed in a reaction mother liquor, and a water-soluble silver described in DE-A-2,921,164. A device for continuously adding a salt and an aqueous solution of a water-soluble halide salt while changing the concentration,
For example, an apparatus described in No. 501776, which takes out the reaction mother liquor from the reactor and concentrates it by an ultrafiltration method to form grains while keeping the distance between silver halide grains constant, may be used.

If necessary, a silver halide solvent such as thioether may be used. Further, a compound having a mercapto group, a nitrogen-containing heterocyclic compound or a compound such as a sensitizing dye may be added at the time of forming silver halide grains or after the completion of grain formation.

The silver halide emulsion according to the present invention can be used in combination with a sensitizing method using a gold compound and a sensitizing method using a chalcogen sensitizer.

As the chalcogen sensitizer applied to the silver halide emulsion according to the present invention, a sulfur sensitizer, a selenium sensitizer, a tellurium sensitizer and the like can be used, and the sulfur sensitizer is preferable. Thiosulfates as sulfur sensitizers,
Allyl thiocarbamide thiourea, allyl isothiocyanate, cystine, p-toluene thiosulfonate, rhodanine, inorganic sulfur and the like can be mentioned.

The addition amount of the sulfur sensitizer according to the present invention is preferably changed according to the type of silver halide emulsion to be applied and the magnitude of the expected effect, but 5 × 10 5 per mol of silver halide. ^{-10 to} 5 × 10 ^-5 mol range,
Preferably, it is in the range of 5 × 10 ^{−8 to} 3 × 10 ⁻⁵ mol.

The gold sensitizer according to the present invention may be added in the form of various gold complexes other than chloroauric acid, gold sulfide and the like. Examples of the ligand compound used include dimethyl rhodanine, thiocyanic acid, mercaptotetrazole, and mercaptotriazole. The amount of the gold compound used varies depending on the type of silver halide emulsion, the type of compound used, the ripening conditions, etc., but is usually 1 × 10 ⁻⁴ mol to 1 × 10 ⁻⁸ mol per mol of silver halide.
It is preferably molar. More preferably, 1 × 10 ⁻⁵
A reduction sensitization method may be used as the chemical sensitization method at a mole of 1 × 10 ⁻⁸ .

The silver halide emulsion according to the present invention is intended to prevent fog that occurs during the process of preparing a silver halide photographic light-sensitive material, reduce performance fluctuation during storage, and prevent fog that occurs during development. Antifoggant known in
Stabilizers can be used. As examples of preferred compounds that can be used for such purposes, JP-A-2-14
The compound represented by the general formula (II) described in the lower column of page 7 of JP-A-6036 can be mentioned, and a more preferred specific compound is (IIa-1) described on page 8 of the same publication. )-(IIa-8), (IIb-1)-(II
b-7) or 1- (3-methoxyphenyl)-
Examples thereof include compounds such as 5-mercaptotetrazole and 1- (4-ethoxyphenyl) -5-mercaptotetrazole. These compounds have a silver halide emulsion grain preparation step, a chemical sensitization step, and
At the end of the chemical sensitization step, it is added in a step such as a coating liquid preparation step. When chemical sensitization is carried out in the presence of these compounds, 1 × 10 ⁻⁵ mol to 5 × per mol of silver halide.
It is preferably used in an amount of about 10 ^-4 mol. When added at the end of chemical sensitization, 1 x per mol of silver halide
An amount of about 10 ⁻⁶ mol to 1 × 10 ⁻² mol is preferable, and 1 ×
The amount is more preferably from 10 ⁻⁵ mol to 5 × 10 ⁻³ mol. In the step of preparing a coating solution, when added to the silver halide emulsion layer, 1 × 10 ⁻⁶ mol to 1 × 10 ⁶ mol per mol of silver halide is used.
An amount of about ^-1 mol is preferred, and 1 × 10 ^-5 mol to 1 × 10
^-2 mol is more preferred. When added to a layer other than the silver halide emulsion layer, the amount in the coating film is preferably about 1 × 10 ^-9 mol to 1 × 10 ^-3 mol per 1 m ² .

In the silver halide photographic light-sensitive material according to the present invention, dyes having absorption in various wavelength regions can be used for the purpose of preventing irradiation and halation. For this purpose, any of the known compounds can be used. In particular, as dyes having absorption in the visible region,
JP-A-3-251840, A described on page 308
The dyes I-1 to 11 and the dyes described in JP-A-6-3770 are preferably used. As the infrared absorbing dye, the general formula (I) described in the lower left column of page 2 of JP-A-1-280750 is used. ), (II) and (III) have preferable spectral characteristics, do not affect the photographic characteristics of the silver halide photographic emulsion, and are preferable because there is no contamination due to residual color. As a specific example of a preferred compound, see Japanese Patent Publication No.
Exemplary compounds (1) to (45) listed in the lower left column of page 5 to the lower left column of page 5 can be exemplified.

In order to improve the sharpness, the amount of these dyes added is 680 nm for an unprocessed sample of a light-sensitive material.
The spectral reflection density in 1 is preferably 0.7 or more and 3.0 or less, and more preferably 0.8 or more and 3.0 or less.

It is preferable to add a fluorescent whitening agent to the light-sensitive material according to the present invention because whiteness can be improved. Preferred examples of the compound include a compound represented by the general formula II described in JP-A-2-232652.

When the silver halide photographic light-sensitive material according to the present invention is used as a color photographic light-sensitive material, it is spectrally sensitized in a specific region of a wavelength range of 400 to 900 nm by combining it with a yellow coupler, a magenta coupler and a cyan coupler. It has a layer containing a silver halide emulsion. The silver halide emulsion contains one kind or a combination of two or more kinds of sensitizing dyes.

Any known compound can be used as the spectral sensitizing dye used in the silver halide emulsion according to the present invention.
BS-1 to 8 described on page 28 of JP-A-251840 can be preferably used alone or in combination. As the green photosensitive sensitizing dye, GS-1 to GS-5 described on page 28 of the same publication are preferably used. RS-1 to 8 described on page 29 of the same publication are preferably used as red-sensitive sensitizing dyes. In the case of performing image exposure with infrared light using a semiconductor laser or the like, it is necessary to use an infrared-sensitive sensitizing dye. The dyes of IRS-1 to 11 described in JP-A No. 6-8 are preferably used. These infrared, red, green, and blue photosensitive sensitizing dyes may be added to supersensitizers SS-1 to SS-9 described in JP-A-4-285950, pp. 8-9, and JP-A-5-66515. Nos. S-1 to S-17 described on pages 15 to 17
Are preferably used in combination.

The sensitizing dye may be added at any time from the formation of silver halide grains to the end of chemical sensitization.

The sensitizing dye may be added by dissolving it in a water-miscible organic solvent such as methanol, ethanol, fluorinated alcohol, acetone, or dimethylformamide, or by dissolving it in water, or adding it as a solid dispersion. It may be added.

As the coupler used in the silver halide photographic light-sensitive material of the present invention, a coupling product having a spectral absorption maximum wavelength in a wavelength range longer than 340 nm is formed by a coupling reaction with an oxidant of a color developing agent. Any compound that can be used can be used, but as a typical example, a yellow dye-forming coupler having a spectral absorption maximum wavelength in the wavelength range of 350 to 500 nm, a wavelength range of 500
Typical examples are magenta dye-forming couplers having a spectral absorption maximum wavelength in the range of -600 nm and cyan dye-forming couplers having a spectral absorption maximum wavelength in the wavelength range of 600 to 750 nm.

Cyan couplers that can be preferably used in the silver halide photographic light-sensitive material of the present invention include:
Couplers represented by general formulas (C-I) and (C-II) described in the lower left column of page 5 of JP-A-4-114154 can be exemplified. Specific compounds are described in the same specification on page 5, lower right column to page 6, lower left column, CC-1 to CC.
-9 may be mentioned.

As magenta couplers that can be preferably used in the silver halide photographic light-sensitive material according to the present invention, there are described general formulas (MI) and (M) described in JP-A-4-114154, page 4, upper right column. -II) can be mentioned. Specific compounds are listed in the lower left column of page 4 to the upper right column of page 5 in the same publication, MC-1 to MC-1.
There can be mentioned those described as MC-11. More preferred of the magenta coupler,
The general formula (M-
Among them, the couplers represented by I), of which the RM of the general formula (M-I) is a tertiary alkyl group, are particularly preferable because of their excellent light resistance. MC-8 to MC-11 described in the upper column on page 5 of the publication are excellent in reproducing colors from blue to purple and red, and are also excellent in detail delineation power, and thus are preferable.

A yellow coupler which can be preferably used in the silver halide photographic light-sensitive material according to the present invention is represented by the general formula (YI) described in JP-A-4-114154, page 3, upper right column. A coupler can be mentioned. Specific compounds include those described as YC-1 to YC-9 in the lower left column of page 3 of the same publication. Above all, a coupler in which RY1 of the general formula [Y-1] of the same publication is an alkoxy group or a coupler represented by the general formula [I] described in JP-A-6-67388 can reproduce yellow having a preferable color tone. preferable. Of these, particularly preferred examples of the compounds include YC-8 and YC-9 described in the lower left column of page 4 of JP-A-4-114154, and
-67388, page 13-14
o (1) to (47). The most preferred compound is described in JP-A-4-8184.
It is a compound represented by the general formula [Y-1] described in JP-A-7-page 1 and JP-A-11-page 11-17.

When the oil-in-water emulsion dispersion method is used to add the coupler and other organic compounds used in the silver halide photographic light-sensitive material of the present invention, it is usually highly water-insoluble with a boiling point of 150 ° C. or higher. If necessary, a low boiling point and / or water-soluble organic solvent may be used in combination with the boiling point organic solvent to dissolve, and emulsified and dispersed in a hydrophilic binder such as an aqueous gelatin solution using a surfactant. As a dispersing means, a stirrer, a homogenizer, a colloid mill, a flow jet mixer, an ultrasonic disperser, or the like can be used. After or at the same time as the dispersion, a step of removing the low boiling organic solvent may be added. Examples of high boiling organic solvents that can be used to dissolve and disperse the coupler include dioctyl phthalate, diisodecyl phthalate, phthalates such as dibutyl phthalate, tricresyl phosphate, and phosphates such as trioctyl phthalate,
Is preferably used. The high-boiling organic solvent preferably has a dielectric constant of 3.5 to 7.0. Further, two or more kinds of high-boiling organic solvents can be used in combination. .

Further, instead of the method using a high-boiling point organic solvent or in combination with a high-boiling point organic solvent, a water-insoluble and organic-solvent-soluble polymer compound is optionally added to a low-boiling point and / or water-soluble organic solvent. It is also possible to employ a method in which the surfactant is dissolved in a hydrophilic binder such as an aqueous gelatin solution and the resulting mixture is emulsified by various dispersing means using a surfactant.
Examples of the water-insoluble and organic solvent-soluble polymer used at this time include poly (Nt-butylacrylamide).

Preferred compounds as the surfactant used for dispersing the photographic additives and adjusting the surface tension during coating are a hydrophobic group having 8 to 30 carbon atoms and a sulfonic acid group or a salt thereof in one molecule. The thing contained is mentioned. Specifically, A-described in the specification of JP-A No. 64-26854.
1-A-11 are mentioned. Also, a surfactant in which a fluorine atom is substituted for an alkyl group is preferably used. These dispersions are usually added to a coating solution containing a silver halide emulsion, but it is preferable that the time from dispersion to addition to the coating solution and the time from addition to the coating solution and coating are short and 10 hours each. It is preferably within 3 hours, more preferably within 3 hours and within 20 minutes.

An anti-fading agent is preferably used in combination with each of the above-mentioned couplers in order to prevent fading of the formed dye image due to light, heat, humidity and the like. Particularly preferred compounds include phenyl ether compounds represented by general formulas I and II described on page 3 of JP-A-2-66541 and general formula IIIB described in JP-A-3-174150.
Phenolic compound represented by JP-A-64-90445
The amine compounds represented by the general formula A described in JP-A No. 62-182741 and the general formulas XII, XIII and X described in JP-A No. 62-182741.
The metal complexes represented by IV and XV are particularly preferable for the magenta dye. Further, a compound represented by the general formula I 'described in JP-A-1-19649 and JP-A-5-11417
The compound represented by the general formula II described in JP-A No. 2-2,056 is particularly preferred for yellow and cyan dyes.

For the purpose of shifting the absorption wavelength of the color forming dye, the compound (d-11) described in JP-A-4-114154, page 9, lower left column, the compound described in the same publication, page 10, lower left column. Compounds such as (A'-1) can be used. In addition to this, US Pat.
The fluorescent dye-releasing compounds described in No. 74,187 can also be used.

In the silver halide light-sensitive material according to the present invention, a compound which reacts with an oxidized product of a developing agent is added to a layer between the light-sensitive layers to prevent color turbidity or to form a silver halide emulsion layer. It is preferable to add it to improve fog and the like.
The compound for this purpose is preferably a hydroquinone derivative, more preferably a dialkylhydroquinone such as 2,5-di-t-octylhydroquinone.
Particularly preferred compounds are those represented by the general formula II described in JP-A-4-133,056, and compounds II-1 to II-14 described on pages 13 to 14 and compound 1 described on page 17 of the same publication are described. No.

It is preferable to add an ultraviolet absorber to the light-sensitive material of the present invention to prevent static fog and improve the light resistance of dye images. Preferred examples of the ultraviolet absorber include benzotriazoles. Particularly preferred compounds are those represented by the formula III-3 described in JP-A-1-250944 and JP-A-64-666.
Compounds represented by the general formula III described in JP-A-46-46, and UV-1L to UV-2 described in JP-A-63-187240.
7L, compounds represented by the general formula I described in JP-A-4-1633, and compounds represented by the general formulas (I) and (II) described in JP-A-5-165144.

For the silver halide photographic light-sensitive material of the present invention, it is advantageous to use gelatin as a binder, but if necessary, other gelatin, gelatin derivatives, graft polymers of gelatin and other polymers, gelatin. Other than the above, hydrophilic colloids such as proteins, sugar derivatives, cellulose derivatives, and synthetic hydrophilic polymer substances such as single or copolymers can also be used.

As the hardener of these binders, it is preferable to use a vinyl sulfone hardener or a chlorotriazine hardener alone or in combination. JP-A-61-24
It is preferable to use the compounds described in JP-A Nos. 9054 and 61-245153. Further, it is preferable to add a preservative and an antifungal agent as described in JP-A-3-157646 to the colloid layer in order to prevent the growth of mold and bacteria which adversely affect photographic performance and image storability. It is preferable to add a slipping agent or matting agent described in JP-A-6-118543 or JP-A-2-73250 to the protective layer in order to improve the physical properties of the surface of the photosensitive material or the processed sample.

In the silver halide photographic light-sensitive material according to the present invention, the support surface is subjected to corona discharge, ultraviolet irradiation, flame treatment, etc., if necessary, and then directly or undercoat layer (adhesiveness of the support surface, Applied through one or more undercoat layers for improving antistatic properties, dimensional stability, abrasion resistance, hardness, antihalation properties, friction properties and / or other properties) Good.

When coating a photographic light-sensitive material using a silver halide emulsion, a thickener may be used in order to improve coatability. Extrusion coating and curtain coating, in which two or more layers can be applied simultaneously, are particularly useful as a coating method.

To form a photographic image using the silver halide photographic light-sensitive material of the present invention, the image recorded on the negative is optically combined with the silver halide photographic light-sensitive material to be printed. It may be imaged and printed, or after the image is once converted into digital information, the image is formed on a CRT (cathode ray tube) and then formed on the silver halide photographic light-sensitive material to be printed. Printing may be performed, or the scanning may be performed by changing the intensity of the laser light based on digital information and scanning.

The present invention is preferably applied to a light-sensitive material in which a developing agent is not incorporated in the light-sensitive material, and particularly preferably to a light-sensitive material for forming an image for direct viewing. For example, color paper, color reversal paper, a photosensitive material for forming a positive image, a photosensitive material for a display, and a photosensitive material for a color proof can be used. It is particularly preferable to apply the invention to a photosensitive material having a reflective support.

As the aromatic primary amine developing agent used in the present invention, known compounds can be used. The following compounds may be mentioned as examples of these compounds.

CD-1) N, N-diethyl-p-phenylenediamine CD-2) 2-amino-5-diethylaminotoluene CD-3) 2-amino-5- (N-ethyl-N-laurylamino) toluene CD-4) 4- (N-ethyl-N- (β-hydroxyethyl) amino) aniline CD-5) 2-methyl-4- (N-ethyl-N- (β-
Hydroxyethyl) amino) aniline CD-6) 4-amino-3-methyl-N-ethyl-N-
(Β- (methanesulfonamido) ethyl) aniline CD-7) N- (2-amino-5-diethylaminophenylethyl) methanesulfonamide CD-8) N, N-dimethyl-p-phenylenediamine CD-9) 4 -Amino-3-methyl-N-ethyl-N-
Methoxyethylaniline CD-10) 4-Amino-3-methyl-N-ethyl-N
-(Β-ethoxyethyl) aniline CD-11) 4-amino-3-methyl-N-ethyl-N
-(Γ-Hydroxypropyl) aniline In the present invention, the above color developer can be used in any pH range, but from the viewpoint of rapid processing, the pH is 9.5 to 13.0.
And more preferably pH 9.8-1.
It is used in the range of 2.0.

The processing temperature for color development according to the present invention is 35.
The temperature is preferably from 70 ° C to 70 ° C. The higher the temperature, the shorter the treatment time is, which is preferable. However, it is preferable that the temperature is not so high in view of the stability of the treatment liquid, and the treatment at 37 ° C. or higher and 60 ° C. or lower is more preferable.

The color development time is conventionally about 3 minutes and 30 seconds, but in the present invention, it is preferably 40 seconds or less, more preferably 25 seconds or less.

To the color developing solution, a known developing solution component compound can be added in addition to the above color developing agent. Usually, alkaline agents having a pH buffering action, chloride ions, development inhibitors such as benzotriazoles, preservatives,
A chelating agent or the like is used.

The silver halide photographic light-sensitive material of the present invention is subjected to bleaching treatment and fixing treatment after color development. The bleaching process may be performed simultaneously with the fixing process. After the fixing process,
Usually, a water washing process is performed. Further, as an alternative to the water washing treatment, a stabilization treatment may be performed. The developing apparatus used for the development of the silver halide photographic light-sensitive material of the present invention may be a roller transport type in which the light-sensitive material is conveyed between rollers disposed in a processing tank, and the belt may be provided with the light-sensitive material. The processing tank may be formed in a slit shape, and the processing liquid may be supplied to the processing tank and the photosensitive material may be transported, or the processing liquid may be sprayed. Spray method,
A web method by contact with a carrier impregnated with the processing solution,
A method using a viscous treatment liquid can also be used. When processing in large quantities, it is usual to perform a running process using an automatic developing machine, but in this case, the replenishment amount of the replenisher is preferably as small as possible. The most preferred method is to add a treating agent in the form of the method described in JP-A-94-16935.

[0107]

EXAMPLES The present invention will be described below with reference to examples, but the embodiments of the present invention are not limited thereto.

Example 1 [Preparation of Support] White base paper for photographic printing paper (grammage 17
5 g / m ² , thickness 180 μm) Polyethylene composition (density 0.95 g / cc, MI 8.0 g / 10) on one surface
Min) was extrusion coated to form a back laminate layer of 30 g / m ² to produce a sheet substrate.

Next, a resin layer having the following composition was provided on the surface opposite to the surface on which the back laminate layer was placed to obtain supports A to Z.

Support A: polyethylene composition (density: 0.
92 g / cc, melt index (MI) 5.0 g /
10 minutes) and 10% by weight of titanium oxide white pigment (anatase type) were added, and after kneading, a water-resistant resin layer of 30 g / m ² was applied on the surface of the sheet-like substrate by melt extrusion coating. .

Support B: A polyethylene terephthalate composition (intrinsic viscosity 0.72 cc / g) of 75% by weight and a titanium oxide white pigment (anatase type) of 25% by weight were kneaded and then melt-extruded at 300 ° C. to obtain 30 g by lamination.
A water resistant resin layer of / m ² was applied on the surface of the sheet-shaped substrate.

Support C: An electron beam curable organic compound-white pigment composition having the following composition was prepared.

Polyester acrylate 25% by weight Hexanediol diacrylate 25% by weight Trimethylolpropane triacrylate 20% by weight Titanium oxide (anatase type) 30% by weight A mixture of the above components was dispersed by a ball mill for 20 hours.

The composition thus obtained was coated on the surface of the sheet-like substrate so that the coating amount after curing was 30 g / m ² . Next, an electron beam was irradiated from the back surface of the sheet-like substrate at an accelerating voltage of 200 KV and an absorbed dose of 2 Mrad to cure the resin and form a resin coating layer.

Support D: A polyethylene composition (density 0.95 g / cc, melt index (MI)) 8. as a resin coating layer (hereinafter referred to as an inner resin layer) adjacent to the base paper.
0 g / 10 min) of 80% by weight and a titanium oxide white pigment (anatase type) of 20% by weight are added, and after kneading, a 15 g / m ² waterproof resin layer is applied to the sheet-like substrate surface by melt extrusion coating. I set it up.

Next, as a resin coating layer (hereinafter referred to as an outer resin layer) closest to the silver halide emulsion layer, a polyethylene composition (density 0.92 g / cc, melt index (M
90% by weight of I) 5.0 g / 10 min) and 10 parts by weight of titanium oxide white pigment (anatase type) are added, and after kneading, a water-resistant resin layer of 20 g / m ² is formed by melt extrusion coating as an inner resin layer. Painted on the surface.

Supports E to G: Supports D have the same kind of resin in the inner resin layer and outer resin layer and the same amount of resin layer (total amount of resin and white pigment), as shown in Table 3. Change the white pigment content (resin content = resin content = 100
Supports E to G were prepared in the same manner as Support D, except that the content was changed to wt%-(wt% of white pigment).

Support H: 7 of polyethylene terephthalate composition (intrinsic viscosity 0.72 cc / g) as the inner resin layer
5% by weight, 25 of titanium oxide white pigment (anatase type)
After kneading wt%, a water-resistant resin layer of 15 g / m ² was applied to the surface of the sheet-like substrate by melt extrusion lamination at 300 ° C.

85% by weight of the polyethylene terephthalate composition (intrinsic viscosity 0.72 cc / g) as the outer resin layer,
1% by kneading 15% by weight of titanium oxide white pigment (anatase type) and then melt extrusion laminating at 300 ° C.
A water-resistant resin layer of 5 g / m ² was applied on the surface of the inner resin layer.

Supports I to J: Supports H have the same kind of resin in the inner resin layer and outer resin layer and the same amount of resin layer (amount of resin and white pigment combined), and as shown in Table 3. Change the white pigment content (resin content = resin content = 100
Supports I to J were prepared in the same manner as the support H except that the content was changed to wt%-(wt% of the white pigment).

Support K: Next, the following modified polyester resin was prepared.

100 parts by weight of dimethyl terephthalate, 14 parts by weight of naphthalene-2,6-dicarboxylic acid dimethyl ester and 80 parts by weight of ethylene glycol were added, and transesterification was carried out by a conventional method. 0.05 parts by weight of antimony trioxide was added to the obtained product, and the temperature was gradually raised and the pressure was reduced to carry out polymerization under the conditions of 280 ° C. and 0.5 mmHg, and terephthalic acid / naphthalenedicarboxylic acid = 9
A modified polyester of 0/10 (molar ratio) was obtained. The intrinsic viscosity of the obtained modified polyester was 0.7 cc / g.

As an inner resin layer, 78% by weight of this modified polyester and 22% by weight of a titanium oxide white pigment (rutile type) were kneaded and then melt-extruded at 300 ° C. to obtain a waterproof resin layer of 20 g / m ² by laminating. It was applied on the surface of the sheet-shaped substrate.

As the outer resin layer, a polyethylene composition (density 0.92 g / cc, melt index (MI) 5.
0 g / 10 min) 85% by weight and titanium oxide white pigment (anatase type) 10% by weight were added, and after kneading, a 10 g / m ² waterproof resin layer was applied on the surface of the resin by melt extrusion coating. .

Support L: An electron beam curable organic compound-white pigment composition having the following composition was prepared.

Urethane acrylate oligomer 25% by weight Diethylene glycol diacrylate 25% by weight Titanium oxide (anatase type) 50% by weight A mixture of the above components was dispersed in a ball mill for 20 hours.

As the inner resin layer, the composition thus obtained was applied to the surface of the sheet-like substrate so that the coating amount after curing was 20 g / m ² . Then, from the back surface of the sheet-like substrate, acceleration voltage: 200 KV, absorbed dose: 2
An electron beam was irradiated under the condition of Mrad to cure the resin to form a resin coating layer.

Next, as an outer resin layer, a polyethylene composition (density 0.92 g / c) was formed on the resin-cured inner coating layer.
c, 99.5 wt% of melt index (MI) 5.0 g / 10 minutes), titanium oxide white pigment (anatase type)
Was added and kneaded, and then a 10 g / m ² waterproof resin layer was applied by melt extrusion coating.

Supports M to O: The support L has the same kind of resin in the inner resin layer and the outer resin layer and the same amount of the resin layer (the amount of the resin and the white pigment combined). The content of the white pigment is changed as shown in (the resin content is the resin content =
Supports M to O were prepared in the same manner as the support L except that the content was 100% by weight- (weight% of white pigment).

Support P: An electron beam curable organic compound-white pigment composition having the following composition was prepared.

Urethane acrylate oligomer 25% by weight Diethylene glycol diacrylate 25% by weight Titanium oxide (anatase type) 50% by weight A mixture of the above components was dispersed in a ball mill for 20 hours.

As the inner resin layer, the composition thus obtained was applied to the surface of the sheet-like substrate so that the coating amount after curing was 20 g / m ² . Then, from the back surface of the sheet-like substrate, acceleration voltage: 200 KV, absorbed dose: 2
An electron beam was irradiated under the condition of Mrad to cure the resin to form a resin coating layer.

Next, as an outer resin layer, 80% by weight of a polyethylene terephthalate composition (intrinsic viscosity 0.72 cc / g) and 20% by weight of titanium oxide white pigment (anatase type) were used.
After kneading, a 10 g / m ² waterproof resin layer was applied to the surface of the inner resin layer by melt extrusion lamination at 300 ° C.

Support Q: An electron beam curable organic compound-white pigment composition having the following composition was prepared.

Polyester acrylate 25% by weight Hexanediol diacrylate 25% by weight Trimethylolpropane triacrylate 10% by weight Titanium oxide (anatase type) 40% by weight A mixture of the above components was dispersed by a ball mill for 20 hours.

As the inner resin layer, the composition thus obtained was applied onto the water-resistant resin layer in a coating amount of 1 after curing.
Coating was performed so as to be 5 g / m ² . Then, from the back surface of the sheet-like substrate, acceleration voltage: 200 KV, absorbed dose: 2 Mr
An electron beam was irradiated under the condition of ad to cure the resin and form a resin coating layer.

The following modified polyester resin was prepared.

100 parts by weight of dimethyl terephthalate, 14 parts by weight of naphthalene-2,6-dicarboxylic acid dimethyl ester and 80 parts by weight of ethylene glycol were added, and transesterification was carried out by a conventional method. 0.05 parts by weight of antimony trioxide was added to the obtained product, and the temperature was gradually raised and the pressure was reduced to carry out polymerization under the conditions of 280 ° C. and 0.5 mmHg, and terephthalic acid / naphthalenedicarboxylic acid = 9
A modified polyester of 0/10 (molar ratio) was obtained. The intrinsic viscosity of the obtained modified polyester was 0.7 cc / g.

As the outer resin layer, 90% by weight of this modified polyester and 1% of titanium oxide white pigment (anatase type) were used.
After kneading 0% by weight, a water-resistant resin layer of 15 g / m ² was applied on the surface of the inner resin layer by melt extrusion lamination at 300 ° C.

Support R: As the inner resin layer, 85% by weight of a polyethylene composition (density 0.92 g / cc, melt index (MI) 5.0 g / 10 min), titanium oxide white pigment (anatase type) 15 20% / m ² of a water resistant resin layer was applied on the surface of the sheet-like substrate in the previous period by melt extrusion coating after adding wt% and kneading.

Next, an electron beam curable organic compound having the following composition
A white pigment composition was prepared.

Polyester acrylate 35% by weight Hexanediol diacrylate 35% by weight Trimethylolpropane triacrylate 15% by weight Titanium oxide (anatase type) 15% by weight A mixture of the above components was dispersed by a ball mill for 20 hours.

The composition thus obtained as an outer resin layer was applied onto the water resistant resin layer in an amount of 10 after curing.
It was applied so as to be g / m ² . Then, from the back surface of the sheet-like substrate, acceleration voltage: 200 KV, absorbed dose: 2 Mra
The outer resin layer was formed by irradiating an electron beam under the condition of d to cure the resin.

Support S: The support R has the same kind of resin in the inner resin layer and the outer resin layer and the same amount of resin layer (the amount of the resin and the white pigment combined), and the white pigment as shown in Table 3 is used. A support S was prepared in the same manner as the support R except that the content of was changed (the resin content is 100% by weight of resin-(% by weight of white pigment)).

Support T: 80% by weight of a polyethylene composition (density 0.92 g / cc, melt index (MI) 5.0 g / 10 min) as the inner resin layer, and 20% of titanium oxide white pigment (anatase type) After the addition of wt% and kneading, a water-resistant resin layer of 15 g / m ² was applied on the surface of the sheet substrate by melt extrusion coating.

The mixture of the above components was dispersed by a ball mill for 20 hours.

Next, an electron beam curable organic compound having the following composition
A white pigment composition was prepared.

Dipentaerythritol hexaacrylate 70% by weight Titanium oxide (rutile type) 30% by weight A mixture of the above components was dispersed by a ball mill for 20 hours.

The composition thus obtained as an outer resin layer was applied onto the water resistant resin layer in an amount of 15 after curing.
It was applied so as to be g / m ² . Then, from the back surface of the sheet-like substrate, acceleration voltage: 200 KV, absorbed dose: 2 Mra
The outer resin layer was formed by irradiating an electron beam under the condition of d to cure the resin.

Support U: 70% by weight of a polyethylene terephthalate composition (intrinsic viscosity 0.72 cc / g) and 30% by weight of a titanium oxide white pigment (anatase type) were kneaded and then melt-extruded at 300 ° C. to obtain 15 g by laminating.
A water resistant resin layer of / m ² was applied on the surface of the sheet-shaped substrate.

An electron beam curable organic compound-white pigment composition having the following composition was prepared.

Polyester acrylate 30 wt% Hexanediol diacrylate 30 wt% Trimethylolpropane triacrylate 25 wt% Titanium oxide (anatase type) 15 wt% A mixture of the above components was dispersed in a ball mill for 20 hours.

The composition thus obtained was coated on the inner resin layer so that the coating amount after curing was 15 g / m ² . Then, from the back surface of the sheet-like substrate, acceleration voltage: 20
The outer resin layer was formed by irradiating an electron beam at 0 KV under the condition of absorbed dose: 2 Mrad to cure the resin.

Support V: 90% by weight of a polyethylene composition (density 0.92 g / cc, melt index (MI) 5.0 g / 10 min) as an inner resin layer, and 10% of titanium oxide white pigment (anatase type) After adding 10% by weight and kneading, a water-resistant resin layer of 10 g / m ² was applied on the surface of the sheet substrate by melt extrusion coating.

An electron beam curable organic compound-white pigment composition having the following composition was prepared.

Urethane acrylate oligomer 25% by weight Acrylate monomer 25% by weight Titanium oxide (anatase type) 50% by weight A mixture of the above components was dispersed by a ball mill for 20 hours.

The composition thus obtained was applied onto the inner resin layer so that the coating amount after curing would be 15 g / m ² . Then, from the back surface of the sheet-like substrate, acceleration voltage: 15
An intermediate resin layer was formed by irradiating an electron beam at 0 KV under the condition of absorbed dose: 2 Mrad to cure the resin.

Next, an electron beam curable organic compound having the following composition was prepared.

Polyester acrylate 35% by weight Hexanediol diacrylate 35% by weight Trimethylolpropane triacrylate 30% by weight The composition thus obtained as an outer resin layer is applied onto the surface of the intermediate resin layer after curing. The amount of coating was 5 g / m ² . Next, an electron beam was irradiated from the back surface of the sheet-like substrate at an accelerating voltage of 200 KV and an absorbed dose of 2 Mrad to cure the resin and form a resin coating layer.

Support W: The inner resin layer and the middle resin layer are the support V
Same as.

Next, an electron beam curable organic compound having the following composition
A white pigment composition was prepared.

Polyester acrylate 30% by weight Hexanediol diacrylate 30% by weight Trimethylolpropane triacrylate 25% by weight Titanium oxide (anatase type) 15% by weight A mixture of the above components was dispersed in a ball mill for 20 hours.

As the outer resin layer, the composition thus obtained was coated on the surface of the middle resin layer at a coating amount of 5 g / cured after curing.
It was applied so as to be m ² . Next, an electron beam was irradiated from the back surface of the sheet-like substrate at an accelerating voltage of 200 KV and an absorbed dose of 2 Mrad to cure the resin and form a resin coating layer.

Support X: Inner resin layer and intermediate resin layer are used as support V
Same as.

Next, an electron beam curable organic compound having the following composition
A white pigment composition was prepared.

Polyester acrylate 27% by weight Hexanediol diacrylate 27% by weight Trimethylolpropane triacrylate 20% by weight Titanium oxide (anatase type) 26% by weight A mixture of the above components was dispersed by a ball mill for 20 hours.

As the outer resin layer, the composition thus obtained was coated on the surface of the middle resin layer at a coating amount of 5 g / cured after curing.
It was applied so as to be m ² . Next, an electron beam was irradiated from the back surface of the sheet-shaped substrate at an acceleration voltage of 200 KV and an absorbed dose of 2 Mrad to cure the resin and form a surface resin coating layer.

As the resin layer in the support Y, a polyethylene composition (density 0.92 g
/ Cc, melt index (MI) 5.0 g / 10
10 g / m ² of a water resistant resin layer was applied to the surface of the sheet-like substrate by melt extrusion coating.

An electron beam curable organic compound-white pigment composition having the following composition was prepared.

Polyester acrylate 25% by weight Hexanediol diacrylate 25% by weight Trimethylolpropane triacrylate 10% by weight Titanium oxide (anatase type) 40% by weight A mixture of the above components was dispersed by a ball mill for 20 hours.

The composition thus obtained was coated on the inner resin layer so that the coating amount after curing was 15 g / m ² . Then, from the back surface of the sheet-like substrate, acceleration voltage: 15
An intermediate resin layer was formed by irradiating an electron beam at 0 KV under the condition of absorbed dose: 2 Mrad to cure the resin.

Next, an electron beam curable organic compound having the following composition
A white pigment composition was prepared.

Dipentaerythritol hexaacrylate 80% by weight Titanium oxide (anatase type) 20% by weight A mixture of the above components was dispersed by a ball mill for 20 hours.

As the outer resin layer, the composition thus obtained was coated on the surface of the middle resin layer in an amount of 5 g / cured after curing.
It was applied so as to be m ² . Next, an electron beam was irradiated from the back surface of the sheet-like substrate at an accelerating voltage of 200 KV and an absorbed dose of 2 Mrad to cure the resin and form a resin coating layer.

Support Z: The inner resin layer and the outer resin layer are supported by the support V
Same as.

Next, an electron beam curable organic compound having the following composition
A white pigment composition was prepared.

Polyester acrylate 35% by weight Hexanediol diacrylate 35% by weight Trimethylolpropane triacrylate 20% by weight Titanium oxide (anatase type) 10% by weight A mixture of the above components was dispersed by a ball mill for 20 hours.

As the outer resin layer, the composition thus obtained was applied on the surface of the middle resin layer in an amount of 5 g / cured after curing.
It was applied so as to be m ² . Next, an electron beam was irradiated from the back surface of the sheet-like substrate at an accelerating voltage of 200 KV and an absorbed dose of 2 Mrad to cure the resin and form a resin coating layer.

Corona discharge treatment (output current value: 2 amperes) was applied to the surface resin layer side of the supports A to Z having a white pigment, and then a gelatin subbing layer was applied with a gelatin coating amount of 40 mg /
It was provided by coating and drying so as to be m ² .

Next, various photographic constituent layers were further coated on the support A provided with a gelatin subbing layer to prepare a multilayer color photographic paper having the following layer constitution. The coating solution was prepared as follows.

The layer order is that the layer closest to the support is the first layer, and the layer farthest from the support is the seventh layer.

First Layer Coating Liquid Yellow coupler (Y-1) 23.4 g, dye image stabilizer (ST-1) 3.34 g, (ST-2) 3.34.
g, (ST-5) 3.34 g, a stain inhibitor (HQ-
1) 0.34 g, 5.0 g of image stabilizer A, 3.33 g of high boiling organic solvent (DBP) and high boiling organic solvent (DN)
P) Ethyl acetate (60 ml) was added and dissolved in 1.67 g, and this solution was emulsified and dispersed in 220 ml of a 10% aqueous gelatin solution containing 7 ml of 20% surfactant (SU-1) using an ultrasonic homogenizer to disperse the yellow coupler. A liquid was prepared. This dispersion was mixed with a blue-sensitive silver halide emulsion prepared under the following conditions to prepare a first layer coating solution.

The coating liquids for the second to seventh layers were prepared in the same manner as the coating liquid for the first layer so that the coating amounts were as shown in Tables 1 and 2.

Further, as a hardener (H-1), (H-2)
Was added. Surfactants (SU-
2) and (SU-3) were added to adjust the surface tension. Further, F-1 was added to each layer so that the total amount became 0.04 g / m ² .

[0185]

[Table 1]

[0186]

[Table 2]

SU-1: Sodium tri-i-propylnaphthalene sulfonate SU-2: Di (2-ethylhexyl) sulfosuccinate sodium salt SU-3: Di (2,3,3,4) sulfosuccinate , 4,
5,5-octafluoropentyl) sodium salt DBP: dibutylphthalate DNP: dinonylphthalate DOP: dioctylphthalate DIDP: di-i-decylphthalate PVP: polyvinylpyrrolidone H-1: tetrakis (vinylsulfonylmethyl) methane H-2 : 2,4-dichloro-6-hydroxy-s-triazine sodium HQ-1: 2,5-di-t-octylhydroquinone HQ-2: 2,5-di-sec-dodecylhydroquinone HQ-3: 2 5-di-sec-tetradecylhydroquinone HQ-4: 2-sec-dodecyl-5-sec-tetradecylhydroquinone HQ-5: 2,5-di [(1,1-dimethyl-4-hexyloxycarbonyl) butyl ] Hydroquinone Image Stabilizer A: pt-octy Luphenol

[0188]

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[0189]

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[0190]

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[0191]

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[0192]

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(Preparation of blue-sensitive silver halide emulsion) 40 ° C.
In 1 liter of a 2% gelatin aqueous solution kept at
Solution) and (solution B) were added simultaneously over 30 minutes while controlling pAg = 7.3 and pH = 3.0, and the following (solution C) and (solution D) were further added at pAg = 8.0, pH = 5.5 and added simultaneously over 180 minutes. At this time, pAg was controlled by the method described in JP-A-59-45437.
H was controlled using sulfuric acid or an aqueous solution of sodium hydroxide.

(Solution A) Sodium chloride 3.42 g Potassium bromide 0.03 g Water was added to 200 ml (Solution B) Silver nitrate 10 g Water was added to 200 ml (Solution C) Sodium chloride 102.7 g K ₂ IrCl ₆ 4 × 10 ^-8 mol / mol Ag K ₄ Fe (CN) ₆ 2 × 10 ^-5 mol / mol Ag potassium bromide 1.0 g Water added 600 ml (solution D) Silver nitrate 300 g Water added 600 ml After addition, Kao Atlas Desalination was performed using a 5% aqueous solution of DEMOL N and a 20% aqueous solution of magnesium sulfate, and then mixed with a gelatin aqueous solution to obtain an average particle size of 0.71μ.
m, coefficient of variation of particle size distribution 0.07, silver chloride content 99.
A 5 mol% monodispersed cubic emulsion EMP-1 was obtained. Next, the addition time of (A solution) and (B solution) and (C) solution and (D)
The same as EMP-1 except that the addition time of the liquid was changed, the average particle size was 0.64 μm, the variation coefficient of the particle size distribution was 0.07,
Monodisperse cubic emulsion EMP having a silver chloride content of 99.5 mol%
-1B was obtained.

The above EMP-1 was optimally chemically sensitized at 60 ° C. using the following compounds. Also EMP-1B
Similarly, after the optimal chemical sensitization, the sensitized E
MP-1 and EMP-1B were mixed at a silver ratio of 1: 1 to obtain a blue-sensitive silver halide emulsion (Em-B).

Sodium thiosulfate 0.8 mg / mol AgX Chlorauric acid 0.5 mg / mol AgX stabilizer STAB-1 3 × 10 ⁻⁴ mol / mol AgX stabilizer STAB-2 3 × 10 ⁻⁴ mol / mol AgX stable Agent STAB-3 3 × 10 ^-4 mol / mol AgX sensitizing dye BS-1 4 × 10 ^-4 mol / mol AgX sensitizing dye BS-2 1 × 10 ^-4 mol / mol AgX (green-sensitive silver halide emulsion) Preparation) (Solution A) and (Solution B)
The average particle diameter was 0.40 μm in the same manner as in EMP-1 except that the addition time of (C) and (C solution) and (D solution) were changed.
m, a coefficient of variation 0.08, and a monodispersed cubic emulsion EMP-2 having a silver chloride content of 99.5%. Next, an average particle size of 0.50
A monodisperse cubic emulsion EMP-2B having a particle size of .mu.m, a coefficient of variation of 0.08 and a silver chloride content of 99.5% was obtained.

The above-mentioned EMP-2 was optimally chemically sensitized at 55 ° C. using the following compounds. Also EMP-2B
Similarly, after the optimal chemical sensitization, the sensitized E
MP-2 and EMP-2B were mixed at a silver amount of 1: 1 to obtain a green-sensitive silver halide emulsion (Em-G).

Sodium thiosulfate 1.5 mg / mol AgX chloroauric acid 1.0 mg / mol AgX stabilizer STAB-1 3 × 10 ⁻⁴ mol / mol AgX stabilizer STAB-2 3 × 10 ⁻⁴ mol / mol AgX stable Agent STAB-3 3 × 10 ⁻⁴ mol / mol AgX Sensitizing dye GS-1 4 × 10 ⁻⁴ mol / mol AgX (Preparation of red-sensitive silver halide emulsion) (Solution A) and (Solution B)
The average particle diameter was 0.40 μm in the same manner as in EMP-1 except that the addition time of (C) and (C solution) and (D solution) were changed.
m, a coefficient of variation 0.08 and a monodisperse cubic emulsion EMP-3 having a silver chloride content of 99.5%. The average particle size is 0.38
A monodisperse cubic emulsion EMP-3B having a particle size of 0.08, a coefficient of variation of 0.08 and a silver chloride content of 99.5% was obtained.

The above EMP-3 was optimally chemically sensitized at 60 ° C. using the following compounds. Also EMP-3B
Similarly, after the optimal chemical sensitization, the sensitized E
MP-3 and EMP-3B were mixed in a silver amount of 1: 1 to obtain a red-sensitive silver halide emulsion (Em-R).

Sodium thiosulfate 1.8 mg / mol AgX chloroauric acid 2.0 mg / mol AgX stabilizer STAB-1 3 × 10 ⁻⁴ mol / mol AgX stabilizer STAB-2 3 × 10 ⁻⁴ mol / mol AgX stable Agent STAB-3 3 × 10 ⁻⁴ mol / mol AgX sensitizing dye RS-1 1 × 10 ⁻⁴ mol / mol AgX sensitizing dye RS-2 1 × 10 ⁻⁴ mol / mol AgX STAB-1: 1- ( 3-acetamidophenyl) -5-mercaptotetrazole STAB-2: 1-phenyl-5-mercaptotetrazole STAB-3: 1- (4-ethoxyphenyl) -5-mercaptotetrazole Further, for the red-sensitive emulsion, SS-1 was added at 2.0 × 10 ⁻³ mol per mol of silver halide.

[0201]

[Chemical 6]

The sample thus obtained was designated as Sample 101. Samples 102 to 126 were prepared in the same manner as the sample 101, except that the supports shown in Tables 3 and 4 were used.

The following evaluations were performed using the samples thus produced.

<Evaluation of Sharpness> A resolution test chart was printed on each sample with red light, and the following development processing was performed. Then, the obtained cyan image was recorded on a microdensitometer PDM-5D (manufactured by Konica Corporation). ), The concentration was measured, and the value represented by the following formula was defined as the sharpness.

Sharpness (%) = (Dmax-Dmin of 3 lines / mm dense line print image) / (Dma in large area)
x-Dmin) Here, Dmax: maximum density Dmin: minimum density The greater this value, the better the sharpness.

<Evaluation of pressure resistance> Before exposure, a Hayden scratch strength tester type 18 (manufactured by Shinto Scientific Co., Ltd.) was used to measure 5,1.
The emulsion surface of each sample was scratched with each load of 0, 20, 30 and 50 g, and then wedge exposure was performed with white light, the following development processing steps were performed, and the occurrence of increase / decrease sensation was evaluated in 5 levels.

∘: Excellent ∘: Good Δ: Slightly generated ×: Occurred XX: Remarkably generated <Evaluation of bending resistance> The undeveloped sample was evaluated using a MIT folding resistance tester.

A sample having a width of 15 mm and a length of 100 mm was measured with a measuring load of 1.0 kg, the number of reciprocal bending was 10 times, and the frequency of occurrence of cracks on the silver halide emulsion coated surface was visually evaluated. did.

∘: Excellent ○: Good Δ: Somewhat occurred ×: Occurred <Evaluation of white background interference fringes> After the following development processing steps were performed with each sample left unexposed, the fluorescent lamp type FL20S EX-
The degree of occurrence of interference fringes was observed under the D fluorescent lamp.

∘: No interference fringes observed, no problem ○: Slightly observed, but practically no problem Δ: slightly observed, practically concerned ×: clearly observed and problematic Not suitable for practical use.

[Development Treatment] Processing Step Treatment Temperature Time Replenishment Amount Color development 38.0 ± 0.3 ° C. 45 seconds 80 cc Bleach fixing 35.0 ± 0.5 ° C. 45 seconds 120 cc Stabilization 30 to 34 ° C. 60 seconds 150 cc Dry 60-80 ° C. 30 seconds The composition of the developing solution is shown below.

Color developer tank solution and replenisher tank solution replenisher pure water 800 ml 800 ml triethylenediamine 2 g 3 g diethylene glycol 10 g 10 g potassium bromide 0.01 g-potassium chloride 3.5 g-potassium sulfite 0.25 g 0.5 g N-ethyl -N- (β methanesulfonamidoethyl) -3-methyl-4-aminoaniline sulfate 6.0 g 10.0 g N, N-diethylhydroxylamine 6.8 g 6.0 g triethanolamine 10.0 g 10.0 g diethylenetriamine Pentaacetic acid sodium salt 2.0 g 2.0 g Optical brightener (4,4′-diaminostilbene disulfonic acid derivative) 2.0 g 2.5 g Potassium carbonate 30 g 30 g Water was added to make the total volume 1 liter, and the tank liquid had pH. = 1
Adjust the replenisher to pH = 10.60 to 0.10.

Bleach-fixing solution tank solution and replenishing solution Diethylenetriamine pentaacetic acid ammonium ferric dihydrate 65 g Diethylenetriamine pentaacetic acid 3 g Ammonium thiosulfate (70% aqueous solution) 100 ml 2-Amino-5-mercapto-1,3,4-thiadiazole 2 0.0 g Ammonium sulfite (40% aqueous solution) 27.5 ml Water is added to bring the total volume to 1 liter, and the pH is adjusted to 5.0 with potassium carbonate or glacial acetic acid.

Stabilizing solution tank solution and replenishing solution o-phenylphenol 1.0 g 5-chloro-2-methyl-4-isothiazolin-3-one 0.02 g 2-methyl-4-isothiazolin-3-one 0.02 g Diethylene glycol 1.0 g Optical brightener (Tinopearl SFP) 2.0 g 1-Hydroxyethylidene-1,1-diphosphonic acid 1.8 g Bismuth chloride (45% aqueous solution) 0.65 g Magnesium sulfate heptahydrate 0.2 g PVP 1 0.0 g Ammonia water (ammonium hydroxide 25% aqueous solution) 2.5 g Nitrilotriacetic acid trisodium salt 1.5 g Water is added to bring the total volume to 1 liter, and pH is adjusted to 7.5 with sulfuric acid or ammonia water.

The obtained results are shown in Tables 3 and 4.

[0216]

[Table 3]

[0219]

[Table 4]

As shown in Tables 3 and 4, the samples according to the present invention have an excellent sharpness of more than 0.70 in the sharpness evaluation and have good pressure fog resistance and bending resistance. It can be seen that the white background has been improved.

Example 2 The same process as in Example 1 was carried out with the following modifications.

Treatment Process Treatment Temperature Time Replenishment Amount Color development 38.0 ± 0.3 ° C. 22 seconds 81 ml Bleach fixing 35.0 ± 0.5 ° C. 22 seconds 54 ml Stabilization 30-34 ° C. 25 seconds 150 ml Dry 60 The composition of the developing treatment solution is shown below.

Color developer tank solution and replenisher tank solution replenisher solution Pure water 800 ml 800 ml Diethylene glycol 10 g 10 g Potassium bromide 0.01 g-potassium chloride 3.5 g-potassium sulfite 0.25 g 0.5 g N-ethyl-N- ( β-methanesulfonamidoethyl) -3-methyl-4-aminoaniline sulfate 6.5 g 10.5 g N, N-diethylhydroxylamine 3.5 g 6.0 g N, N-bis (2-sulfoethyl) hydroxyamine 3. 5 g 6.0 g Triethanolamine 10.0 g 10.0 g Diethylenetriamine pentaacetic acid sodium salt 2.0 g 2.0 g Optical brightener (4,4′-diaminostilbene disulfonic acid derivative) 2.0 g 2.5 g Potassium carbonate 30 g 30 g Add water to bring the total volume to 1 liter and Liquid is pH =
At 10.10, the replenisher is adjusted to pH = 10.60.

Bleach-fixing solution tank solution and replenishing solution tank solution replenishing solution diethylenetriamine pentaacetate ammonium ferric dihydrate 100 g 50 g diethylenetriamine pentaacetic acid 3 g 3 g ammonium thiosulfate (70% aqueous solution) 200 ml 100 ml 2-amino-5-mercapto-1 , 3,4-thiadiazole 2.0 g 1.0 g Ammonium sulfite (40% aqueous solution) 50 ml 25 ml Water was added to bring the total volume to 1 liter, and the pH of the tank solution was adjusted to 7.0 with potassium carbonate or glacial acetic acid, and the replenisher solution was pH = 6.
Adjust to 5.

Stabilizing solution tank solution and replenishing solution o-phenylphenol 1.0 g 5-chloro-2-methyl-4-isothiazolin-3-one 0.02 g 2-methyl-4-isothiazolin-3-one 0.02 g Diethylene glycol 1.0 g Optical brightener (Tinopearl SFP) 2.0 g 1-Hydroxyethylidene-1,1-diphosphonic acid 1.8 g PVP 1.0 g Ammonia water (25% ammonium hydroxide aqueous solution) 2.5 g Ethylenediaminetetraacetic acid 1 0.0 g Ammonium sulfite (40% aqueous solution) 10 ml Water is added to bring the total volume to 1 liter, and pH is adjusted to 7.5 with sulfuric acid or aqueous ammonia.

Evaluation was carried out in the same manner as in Example 1, and it was confirmed that the effects of the present invention were effectively obtained.

Example 3 In Example 1, NPS manufactured by Konica was used as an automatic processor.
-868J, ECOJET-P was used as a treatment chemical, and running treatment was performed according to process name CPK-2-J1. Evaluation was performed in the same manner as in Example 1, and it was confirmed that the effects of the present invention were obtained.

[0226]

According to the present invention, it is possible to obtain a silver halide photographic light-sensitive material which is excellent in sharpness and pressure fog resistance, and has improved bending resistance and white background.

Claims (3)

[Claims] 1. A silver halide having at least one photosensitive silver halide emulsion layer and at least one non-photosensitive layer on one side of a paper support having a resin coating layer coated on both sides of a base paper. In the photographic light-sensitive material, the resin coating layer on the silver halide emulsion layer-coated side of the paper support is composed of two or more layers having different white pigment contents, and is contained in the two or more resin coating layers. The average content of the white pigment is 16% by weight or more, and the content of the white pigment in the resin coating layer closest to the silver halide emulsion layer is 1 to 25% by weight. A silver halide photographic light-sensitive material comprising a silver halide emulsion having a content of 95 mol% or more. 2. A resin coating layer comprising a laminate of two or more layers, wherein at least one layer of the resin coating layer is made of a polyolefin resin or polyester resin, and at least one layer of the resin coating layer is a resin other than a polyolefin resin. The silver halide photographic light-sensitive material according to claim 1, wherein 3. The silver halide photographic light-sensitive material according to claim 1, wherein the white pigment contained in the two or more resin coating layers has an average content of 18% by weight or more.