JPH05158182A - Direct positive silver halide color photographic sensitive material and method for preparing color proof - Google Patents

Abstract

PURPOSE:To provide photosensitive material for color proof wherein a specified picture is obtained even when the area of a dot picture is changed and the degree of approximation of image quality for a printed matter is improved in the case of preparing a color proof from information of a dot picture and to obtain a method for preparing the color proof wherein the same is used. CONSTITUTION:In the direct positive silver halide color photographic sensitive material which has an yellow picture forming layer different in spectral sensitivity, a magenta picture forming layer, a cyan picture forming layer and a black picture forming layer, the black picture forming layer contains the couples of cyan, magenta and yellow. Further, when the coupler groups of three colors are added by regulating the blending ratio of the couplers so that the gamma balance of the medium concentration part is made equal in a single emulsion layer, the direct positive silver halide color photographic sensitive material is constituted so that the appearant difference of sensitivity shown in logarithm of three colors is regulated to a range within 0.10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color image (color proof) for proofing from a plurality of black and white halftone images obtained by color separation and conversion of halftone images in color plate making and printing processes
The present invention relates to a direct positive silver halide color photographic light-sensitive material which can be preferably used for producing the above and a method for producing a color proof using the same.

[0002]

BACKGROUND OF THE INVENTION There are mainly two types of techniques known in the art for obtaining direct positive images. One of the types is to use an emulsion containing silver halide grains having fog nuclei in advance and destroy fog nuclei or latent images in exposed areas by utilizing solarization or the Herschel effect, etc. , You get a direct positive.

Another type uses an emulsion containing internal latent image type silver halide grains which do not cause fog (generally surface fog) until image exposure, and fog treatment (nucleation treatment) after image exposure. Then, a positive image can be directly obtained by performing the surface development and then performing the surface development, or by performing the surface development while performing the fog treatment after the image exposure.

The above-mentioned fog treatment may be carried out by exposing the whole surface, chemically using a fog agent, using a strong developing solution, or by heat treatment. The emulsion containing the internal latent image type silver halide emulsion grains is a silver halide grain having a photosensitive nucleus mainly inside the silver halide crystal grains and forming a latent image inside the grains by exposure. The emulsion contained.

Of the above two techniques for forming a positive image, the latter type is generally higher in sensitivity than the former type and is suitable for applications requiring high sensitivity. Various techniques have been known so far in this technical field. For example, U.S. Patents 2,592,250 and 2,466,9
No. 57, No. 2,497,875, No. 2,588,982, No. 3,761,266
No. 3,761,276, No. 3,796,577 and British Patent 1,151,
The method described in No. 363 is known.

Regarding the mechanism of forming a positive image, for example, Photographic Science and Engineering 20
Vol. 158 (1976) states:

Photoelectrons generated in the silver halide crystal grains by imagewise exposure are selectively captured inside the grains to form an internal latent image. Since this internal latent image acts as an effective trap center for electrons in the conduction band, in the exposed particles, the electrons injected in the subsequent fog development process are trapped inside and assist the latent image. Become. In this case, the latent image is not developed by surface development because it is inside. On the other hand, in particles that have not been subjected to image exposure, at least some of the injected electrons are captured on the surface of the particle and a latent image is formed there, so that the particle is developed by surface development.

Although a positive image can be formed by using the above-mentioned known technique, further improvement of photographic performance is desired for practical application of these photographic light-sensitive materials to various photographic fields. It is rare.

On the other hand, as a conventional method for obtaining a color proof from a plurality of black and white halftone images obtained by color separation and halftone image conversion in the process of color plate making / printing, a diazo compound or a photopolymer is used. An overlay method for forming a color image and a surprint method are known.

The overlay method is very simple and inexpensive to produce, and it has the advantage that it can be used for proofreading simply by stacking four color (subtractive primary colors and black) film sheets. There is a drawback in that gloss is generated by stacking, and therefore, a texture different from that of the printed matter is obtained.

In the surprint method, a colored image is superposed on one support, and a method of obtaining a colored image by toner development utilizing the adhesive property of a photopolymerizable material is described in US Pat. No. 3,582,327. Nos. 3,607,264 and 3,620,726.

Further, a color proof is formed by transferring to a support using a photosensitive coloring sheet, forming an image by exposure and development, laminating another coloring sheet on this, and repeating the same process. How to create is
It is known from 47-27441 and JP-A-56-501217.

Further, there is disclosed a method in which a photosensitive colored sheet is used and each colored image obtained by exposing and developing the corresponding color separation film is transferred and formed on one support.
Known as No. 59-97140. As the colorant of the toner and the color sheet for forming these images, the same coloring material as the printing ink can be used, and thus the color tone of the obtained color proof becomes similar to that of the printed matter.

However, these methods have the drawbacks that images must be superposed or transferred in the process of producing a color proof, which requires a long operation time and a high production cost.

As a solution to these drawbacks, a method for producing a color proof using a silver salt color photographic light-sensitive material having a white support is disclosed in JP-A-56-113139 and JP-A-56-104335. 62-280746, 62-280747, 62-
280748, 62-280749, 62-280750, 62-28084
No. 9 etc.

In this method, a color-separated black-and-white halftone image consisting of a plurality of sheets converted from a color original into color-separated halftone images is successively printed on one sheet of color paper by a method such as contact printing to develop the color. A color image formed by a dye formed from a coupler imagewise by color development after development is used as a proof image.

However, in this technique, when the color image is approximated to the printed matter, the density of the black image such as characters is insufficient as compared with the printed matter, and the density of the black image such as the characters is increased to approximate the density of the printed matter. If the measures are taken, there is a drawback that the degree of approximation of the color image of the printed matter deteriorates and it is difficult to satisfy both of them.

As a technique for improving this drawback, a technique of providing a fourth black plate layer having a spectral sensitivity different from that of any of the yellow coloring layer, the magenta coloring layer and the cyan coloring layer has been conventionally known. There is. For example, in JP-A-3-122637,
A technique using four types of image forming layers of yellow, magenta, cyan, and black is disclosed. Further, JP-A-2-289846,
No. 2-183251 discloses a technique for improving this problem, but in any case, the number of exposures increases and productivity is impaired, or when the halftone image area changes It is lacking in stability, such as inability to obtain an image, and further improvement is required for practical use. Further, as a technique for obtaining a black plate layer by mixing couplers, for example, JP-A-56-51740
JP, 3-107144 and the like, this is a light-sensitive material for obtaining a monochromatic image, the black halftone image to be added to the color halftone image obtained from the color separated image No mention is made, and further, there is room for improvement in terms of image stability such that a constant density cannot be obtained when the halftone dot image area changes.

[0019]

Therefore, an object of the present invention is to produce a color proof from a halftone dot image information obtained by color separation and halftone dot image conversion using a silver halide color photographic light-sensitive material. It is an object of the present invention to provide a color proof photosensitive material capable of obtaining a color proof with improved image quality approximation with high production efficiency, and a method for producing a color proof using the same. Another object of the present invention is to provide a color proof light-sensitive material which can obtain a color proof with which a constant image can be obtained even when the area of a halftone image changes, and a method for producing a color proof using the same.

[0020]

The above objects of the present invention are as follows: (1) At least one yellow image-forming silver halide emulsion layer having different spectral sensitivities containing internal latent image type silver halide grains on a support; At least one black image forming layer containing at least one magenta image forming silver halide emulsion layer and at least one cyan image forming silver halide emulsion layer and containing internal latent image type silver halide grains A direct positive silver halide color photographic light-sensitive material having a silver halide silver halide emulsion layer, the black image-forming silver halide emulsion layer comprises at least one cyan coupler and at least one cyan coupler.
Of magenta couplers and at least one yellow coupler, the group of couplers of the three colors forming a light-sensitive material on a reflective support having them added to a single emulsion layer to form an aromatic amine developer. After developing with a developer containing bleach, bleach-fix processing is performed and sensitometry is performed to measure red light density, green light density and blue light density so that the middle density gamma balance becomes equal. A direct positive silver halide color photograph characterized by being composed of a group of couplers whose apparent sensitivity difference expressed by the logarithm of three colors is within 0.10 when the compounding ratio of couplers is adjusted. Achieved by a photosensitive material.

Further, (2) the black image forming silver halide emulsion layer has a spectral sensitivity region having a common portion with the spectral sensitivity region of the yellow image forming silver halide emulsion layer, and the magenta image forming. Has a spectral sensitivity region having a common portion with the spectral sensitivity region of the photographic silver halide emulsion layer, and has a spectral sensitivity region having a common portion with the spectral sensitivity region of the cyan image forming silver halide emulsion layer. The direct positive silver halide color photographic light-sensitive material as described in the above item (1), and (3) halftone image information consisting of color-separated yellow image information, magenta image information, cyan image information and black image information. On the basis of a direct positive silver halide color photographic image having a yellow image forming layer, a magenta image forming layer, a cyan image forming layer and a black image forming layer on a support. In the step of exposing the material to light to produce a color proof, the direct positive silver halide color photographic light-sensitive material is the direct positive silver halide color photographic light-sensitive material described in the above item (1) or (2). Is achieved by a method for producing a color proof.

The present invention will be described in more detail below.

The non-pre-fogged internal latent image type silver halide grains according to the present invention mainly form a latent image inside the silver halide grains and have most of the photosensitive nuclei inside the grains. The emulsion having grains includes any silver halide such as silver bromide, silver chloride, silver chlorobromide, silver chloroiodide, silver iodobromide and silver chloroiodobromide.

Particularly preferably, the coated silver amount is about 1 to 3.5 g /
A portion of the sample coated on a transparent support in the m ² range was exposed to a light intensity scale for a defined period of time of about 0.1 second to about 1 second to produce a substantially silver halide. When only the surface image of a grain not containing a solvent is developed by using the following surface developer A at 4 ° C. for 4 minutes, another part of the same emulsion sample is also exposed to give an image of the inside of the grain. Is an emulsion exhibiting a maximum density which is not more than 1/5 of the maximum density obtained when developed with the following internal developer B at 20 ° C. for 4 minutes. More preferably, the maximum density obtained using surface developer A is less than the maximum density obtained with internal developer B.
It is not greater than / 10.

(Surface developer A) Metol 2.5 g L-ascorbic acid 10.0 g Sodium metaborate (tetrahydrate) 35.0 g Potassium bromide 1.0 g Water was added to 1000 ml (internal developer) Metol 2.0 g Sodium sulfite ( Anhydrous) 90.0 g Hydroquinone 8.0 g Sodium carbonate (monohydrate) 52.5 g Potassium bromide 5.0 g Potassium iodide 0.5 g Water is added to 1000 ml Also, the internal latent image type silver halide emulsion in the present invention can be prepared by various methods. Including those prepared in. For example US patent
Conversion type silver halide emulsions described in 2,592,250, or silver halide emulsions having internally chemically sensitized silver halide grains described in U.S. Patents 3,206,316, 3,317,322 and 3,367,778, or U.S. Pat.Nos. 3,271,157, 3,447,927 and 3,53,291 contain emulsions having silver halide grains containing a polyvalent metal ion, or dopants described in U.S. Pat. A silver halide emulsion in which the grain surface of the silver halide grain is weakly chemically sensitized, or a grain having a laminated structure described in JP-A Nos. 50-8524, 50-38525 and 53-2408. And the silver halide emulsions described in JP-A Nos. 52-156614 and 55-127549.

The internal latent image type silver halide grain in the present invention is a silver halide having an arbitrary halogen composition, for example, silver bromide, silver chloride, silver chlorobromide, silver chloroiodide, silver iodobromide, chloroiodo. It may be silver bromide. The grains containing silver chloride have excellent developability and are suitable for rapid processing.

The shape of particles is cubic, octahedral, (100) plane
A tetrahedron composed of a mixture of (111) faces, a shape having a (110) face,
It may be spherical, flat, or the like. The average particle size is 0.
Those having a diameter of 05 to 3 μm can be preferably used. The grain size distribution may be a monodisperse emulsion having uniform grain size and crystal habit, or an emulsion having no uniform grain size or crystal habit, but a monodisperse silver halide emulsion having uniform grain size and crystal habit. Is preferred. In the present invention, the monodisperse silver halide emulsion means that the weight of silver halide contained within a grain size range of ± 20% around the average grain size r is 60% or more of the total weight of silver halide grains. The content is preferably 70% or more, more preferably 80% or more. Here, the average particle size r is the product n of the frequency ni and ri ^{3 of} particles having the particle size r i.
It is defined as the grain size ri when i × ri ³ becomes maximum. (3 significant digits, rounding off the least significant digit to 4.) The grain size referred to here is the diameter of spherical silver halide grains,
Further, in the case of particles having a shape other than spherical, it is the diameter when the projected image is converted into a circular image having the same area. The particle size is, for example, taken by enlarging the particles from 10,000 times to 50,000 times with an electron microscope,
It can be obtained by measuring the particle diameter on the print or the area at the time of projection. (It is assumed that the number of measured grains is 1000 or more indiscriminately.) A particularly preferable highly monodisperse emulsion is (grain size standard deviation / mean grain size) × 100 = distribution defined by breadth (%) of distribution. Is less than 20% wide. Here, the average particle size and the particle size standard deviation are obtained from ri defined above.

The monodisperse emulsion can be obtained by adding a water-soluble silver salt solution and a water-soluble halide solution to a gelatin solution containing seed grains by the double jet method under the control of pAg and pH. In determining the addition rate,
Reference can be made to JP-A-54-48521 and JP-A-58-49938.

As a method for obtaining a more advanced monodisperse emulsion, the growth method in the presence of a tetrazaindene compound disclosed in JP-A-60-122935 can be applied.

The silver halide in the present invention can be optically sensitized with a commonly used sensitizing dye. It is also useful for the silver halide emulsion of the present invention to use a combination of sensitizing dyes used for supersensitization such as an internal latent image type silver halide emulsion and a negative type silver halide emulsion. Regarding the sensitizing dyes, Research Disclosure (hereinafter abbreviated as RD) Nos. 15162 and 17643 can be referred to.

In the present invention, the yellow image forming layer, the magenta image forming layer and the cyan image forming layer have different spectral sensitivities. This is at least 4 times higher than the spectral sensitivities of the other layers at any wavelength in the spectral sensitivity range of each layer.
It is sufficient that there is a wavelength exhibiting a double sensitivity, preferably, there is a wavelength exhibiting at least a 8 times sensitivity.

The black image-forming silver halide emulsion layer in the present invention contains at least one yellow coupler, at least one magenta coupler, at least one cyan coupler, and the three color coupler groups are Is added to a single emulsion layer to form a light-sensitive material on a reflective support, which is developed with a developer containing an aromatic amine developer and then bleach-fixed. Measure the light density, green light density, blue light density,
When the compounding ratios of the couplers are adjusted so that the gamma balance in the middle density portion is equal, the coupler group is such that the apparent sensitivity difference represented by the logarithm of the three colors is within 0.10.

The yellow coupler, magenta coupler and cyan coupler contained in the black image forming silver halide emulsion layer according to the present invention are couplers as described below. That is, red, green and blue images obtained by exposing and developing a light-sensitive material having a negative type silver chlorobromide emulsion and an emulsion layer containing a coupler of yellow, magenta and cyan on a reflective support by a predetermined method. When the compounding ratio of each coupler is adjusted so that the gamma balance measured in step 1 is equal, the apparent sensitivity differences measured in red, green and blue are all within 0.1.

The present invention will be specifically described below in (1) to (5).

(1) Preparation of coating sample An average particle size of 0.3 on the reflective support, which was appropriately chemically sensitized.
.About.0.7 .mu.m of silver chlorobromide emulsion (AgCl content of 10% to 50%) is coated so that the coating amount in terms of silver is in the range of 1 to ² g / m.sup.2, and at the same time, in the emulsion layer. Coating is performed so that the total amount of the yellow coupler, the magenta coupler, and the cyan coupler added by mixing is 2 × 10 ⁻³ to 4 × 10 ⁻³ mol / m ² . However, as for the mixing ratio of each coupler, after the exposure, processing is carried out in the processing step of (3) below, and coating is carried out in such a ratio that the gamma balance is within the range determined by the coupler ratio determining method of (4).

(2) Exposure Exposure is performed through an optical wedge for sensitometry.

(3) Treatment process and treatment liquid Developer Konica CPK-1-11 treatment Prepared from replenisher K-11P1R and starter K-11P1S Bleach Konica CPK-1-11 treatment Replenisher K-11P2R (4) Determination of coupler ratio Obtained by exposure and development The characteristic curve is obtained by measuring the image with blue light density, green light density, and red light density. When the maximum density (Dmax) and the minimum density (Dmin) are set for each color, a density point showing D = Dmin + (Dmax−Dmin) × 0.2 and a density point showing D = Dmin + (Dmax−Dmin) × 0.7 on the characteristic curve. Gamma is the absolute value of the slope of the straight line connecting the points.
Gamma measured with red light, green light, and blue light is G respectively
(R), G (G), G (B), 0.95 ≦ G (R) / G (G) ≦ 1.05 0.95 ≦ G (G) / G (B) ≦ 1.05 0.95 ≦ G (B) / G The mixing ratio of the coupler is determined so that (R) ≦ 1.05.

(5) Measurement of Apparent Sensitivity Difference D = Dmin + (Dmax-Dmin) × on the characteristic curve of each color for images having the same gamma balance by adjusting the coupler ratio.
The common logarithm of the reciprocal of the relative value of the exposure amount showing the density of 0.5 is defined as the apparent sensitivity at the density of the color. The apparent sensitivity values measured with red light, green light, and blue light are respectively S
(R), S (G), S (B), 0.90 ≦ (S (R) −S (G)) ≦ 1.10 0.90 ≦ (S (G) −S (B)) ≦ 1.10 0.90 ≦ (S A coupler having (B) -S (R)) ≦ 1.10 is preferable.

Examples of preferable cyan couplers that can be used in the black image forming silver halide emulsion layer of the present invention include compounds represented by the following general formula (I).

[0040]

[Chemical 1]

In the formula, R ₁ represents an alkyl group or an aryl group. R ₂ represents an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group. R ₃ represents a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group. Also, R ₃ is R ₁
May form a ring together with.

Z ₁ represents a hydrogen atom or an atom or group capable of splitting off upon reaction with an oxidized product of the aromatic primary amine developer.

In the cyan coupler represented by the general formula (I), the alkyl group formed by R ₁ is preferably an alkyl group having 1 to 32 carbon atoms, which may be linear or branched and may have a substituent. Including those that have.

The aryl group represented by R ₁ is preferably a phenyl group, including those having a substituent.

The alkyl group represented by R ₂ is preferably an alkyl group having 1 to 32 carbon atoms, and these alkyl groups may be linear or branched and include those having a substituent.

The cycloalkyl group represented by R ₂ preferably has 3 to 12 carbon atoms, and these cycloalkyl groups include those having a substituent.

The aryl group represented by R ₂ is preferably a phenyl group, including those having a substituent.

The heterocyclic group represented by R ₂ is preferably a 5- to 7-membered heterocyclic group, including those having a substituent, including those having a substituent, and optionally condensed.

R ₃ represents a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group, and the alkyl group and the alkoxy group include those having a substituent, but R ₃ is preferably a hydrogen atom.

The ring formed by R ₁ and R _{3 in combination} is preferably a 5- or 6-membered ring, and examples thereof include:

[0051]

[Chemical 2]

The group capable of splitting off upon reaction with the oxidized product of the aromatic primary amine developer represented by Z ₁ in the general formula (I) includes a halogen atom, an alkoxy group, an aryloxy group, an acyloxy group, Examples thereof include a sulfonyloxy group, an acylamino group, a sulfonylamino group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group and an imide group (including those each having a substituent), but preferably a halogen atom, an aryloxy group, It is an alkoxy group.

Of the above-mentioned cyan couplers, particularly preferable ones are those represented by the following general formula (IA).

[0054]

[Chemical 3]

In the formula, R _G1 represents a phenyl group substituted with at least one halogen atom, and these phenyl groups further include those having a substituent other than a halogen atom.

R _G2 has the same meaning as R _{1 in} formula (I). Z _G represents a halogen atom, an aryloxy group or an alkoxy group, and includes those having a substituent.

Specific examples of the cyan coupler represented by formula (I) include compounds I-1 to I-31 described on pages 6 to 7 of JP-A-3-107144. ..

Specific examples of the above-mentioned cyan coupler include, for example, Japanese Patent Application No. 61-21853, pages 26 to 35, JP-A-60-225155, page 7, lower left column, to page 10, lower right. No. 2, Japanese Patent Application Laid-Open No. 60-222853, page 6, upper left column to page 8 lower right column, and Japanese Patent Application Laid-Open No. 59-185335, page 6, lower left column to page 9 upper left column 2 It includes a 5,5-diacylamino cyan coupler and can be synthesized according to the methods described in these specifications and publications.

The cyan dye-forming coupler represented by the above general formula (I) of the present invention usually contains 1 part per mol of silver halide.
It can be used in the range of × 10 ^-2 to 1 mol, preferably 1 × 10 ^-2 to 8 × 10 ^-1 mol.

Examples of preferable cyan couplers that can be used in the black image forming silver halide emulsion layer of the present invention include compounds represented by the following general formula (II).

[0061]

[Chemical 4]

In the formula, R ₄ represents a ballast group and R ₅ represents an alkyl group. Z ₁ represents a hydrogen atom or an atom or group capable of splitting off upon reaction with an oxidized product of the aromatic primary amine developer.

In formula (II), the ballast group represented by R ₄ provides the coupler molecule with sufficient bulk to prevent the coupler from substantially diffusing into the multilayer from the layer in which it is applied. It is an organic group having the size and shape.

The preferred ballast group is represented by the following general formula.

[0065]

[Chemical 5]

R ₆ represents an alkyl group having 1 to 12 carbon atoms, Ar represents an aryl group such as a phenyl group, and this aryl group may have a substituent.

The alkyl group represented by R ₆ may be linear or branched. The group capable of splitting off upon reaction with the oxidized product of the aromatic primary amine developer represented by Z ₂ is a halogen atom, an alkoxy group, an aryloxy group, an acyloxy group, a sulfonyloxy group, an acylamino group, a sulfonylamino group. Examples thereof include a group, an alkoxycarbonyloxy group, and an imide group, with a halogen atom, an aryloxy group, and an alkoxy group being preferred.

Specific examples of the cyan coupler represented by the general formula (II) include compounds II-1 to II-20 described on pages 8 to 9 of JP-A-3-107144.

Specific examples of cyan couplers that can be used in the present invention, including these, are described in JP-B-49-11572.
JP-A-61-3142, 61-9652, 61-9653, 61-39
No. 045, No. 61-50136, No. 61-99141, No. 61-105545.

The cyan coupler represented by the above general formula (II) of the present invention is usually 2 × 10 ^-3 to 1 mol per mol of silver halide.
It can be used in an amount of 8 × 10 ⁻¹ mol, preferably 1 × 10 ⁻² to 10 ⁻¹ mol.

Examples of preferred magenta couplers that can be used in the black image-forming silver halide emulsion layer of the present invention include compounds represented by the following general formula (III).

[0072]

[Chemical 6]

In the formula, R ₁ is a hydrogen atom or a chain or cyclic alkyl group (eg, methyl, ethyl, isopropyl, t-butyl, t-octyl, allyl, cyclohexyl, norbornyl, etc.) or a substituted chain or cyclic An alkyl group of
Carbooxy, alkoxycarbonyl, aryloxycarbonyl, sulfo, sulfamoyl, carbamoyl,
Those selected from acyl, aminoureido, heterocycle, arylsulfonyloxy and oxo groups such as β-cyanoethyl, β-chloroethyl, benzyl, nitrobenzyl, dichlorobenzyl, γ- (2,4-di-t-benzyl) Phenoxy) -propyl, β-phenoxyethyl, etc.).

Further, R ₁ is an aryl group (eg, phenyl,
α- or β-naphthyl group) or an aryl group having at least one substituent (substituents include, for example, alkyl, alkoxy, aryloxy, halogen atom, carboxy, alkoxycarbonyl, acylamino, carbamoyl, alkylcarbamoyl, dialkylcarbamoyl) , Arylcarbamoyl, alkylsulfonamide, arylsulfonamide, cyano and nitro groups)
Represents. In particular, at least one of the ortho positions is an alkyl group,
Phenyl groups substituted by alkoxy groups, halogen atoms, etc. (eg 2,4,6-trichlorophenyl group, 2,6-
Dichloro-4-methoxyphenyl etc.) is useful. R ₁ also represents a heterocyclic group (a nitrogen atom, an oxygen atom as a hetero atom,
5- to 6-membered heterocyclic ring containing a sulfur atom or the like, condensed heterocyclic ring, for example, pyrrolyl, pyridylquinolyl, furyl, benzothiazolyl, oxazolyl, imidazolyl, naphthoxazolyl, etc.) or substituents enumerated above for the aryl group. Represents a heterocyclic group substituted by.

R ₂ represents an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group, a heterocyclic group or a substituted heterocycle having the same meaning as R ₁ described above.

R ₂ is also a substituted oxy group (eg, methoxy, ethoxy, phenoxy, tolyloxy group, etc.) or amino group (eg, substituted or unsubstituted N-alkylamino, cycloalkylamino, N, N-dialkyl, respectively). Amino, N-alkyl-N-arylamino, N-arylamino group, etc.).

Specific examples of the magenta coupler represented by the general formula (III) include compounds III-1 to III-17 described on pages 10 to 11 of JP-A-3-107144.

Preferred yellow couplers which can be used in the black image forming silver halide emulsion layer of the present invention include compounds represented by the following general formula (IV).

[0079]

[Chemical 7]

In the formula, R ₁₁ represents an alkyl group (eg, methyl, ethyl, propyl, butyl group, etc.) or an aryl group (eg, phenyl, p-methoxyphenyl, etc.),
R ₁₂ represents an aryl group, and Y represents a hydrogen atom or a group which is released during the color development reaction.

Further, as the yellow coupler which forms the dye image according to the present invention, particularly preferable are the compounds represented by the following general formula (V).

[0082]

[Chemical 8]

In the formula, R ₁₃ represents a halogen atom, an alkoxy group or an aryl group, and R ₁₄ , R ₁₅ and R ₁₆ represent a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkoxy group, an aryl group and an aryl group, respectively. It represents an oxy group, a carbonyl group, a sulfonyl group, a carboxyl group, an alkoxycarbonyl group, a carbamyl group, a sulfone group, a sulfamyl group, a sulfonamide group, an acylamide group, a ureido group or an amino group, and Y has the above-mentioned meaning.

These are described, for example, in US Pat. No. 2,778,658,
2,875,057, 2,908,573, 3,227,155, 3,2
27,550, 3,253,924, 3,265,506, 3,277,15
No. 5, No. 3,341,331, No. 3,369,895, No. 3,384,657,
3,408,194, 3,415,652, 3,447,928, 3,5
51,155, 3,582,322, 3,725,072, 3,894,87
5, West German Patent Publication 1,547,868, 2,057,941, 2,1
62,899, 2,163,812, 2,213,461, 2,219,91
No. 7, No. 2,261,361, No. 2,263,875, Japanese Patent Publication No. 49-13576
No. 48-29432, 48-66834, 49-10736,
49-122335, 50-28834 and 50-132926.

Specific examples of the yellow coupler represented by formula (V) include compounds Y-1 to Y-32 described on pages 11 to 13 of JP-A-3-107144. ..

In the present invention, the black image forming layer has a spectral sensitivity region having a common portion with the spectral sensitivity region of the yellow image forming silver halide emulsion layer, and the magenta image forming silver halide emulsion layer. It is preferable to have a spectral sensitivity region having a common part with the spectral sensitivity region of No. 1 and a spectral sensitivity region having a common part with the spectral sensitivity region of the cyan image forming silver halide emulsion layer.

That is, the black image-forming layer of the present invention has sensitivity to light having any wavelength in the spectral sensitivity wavelength range of the yellow image-forming layer, and further has any spectral sensitivity wavelength range of the magenta image-forming layer. It is preferable to have sensitivity to light of that wavelength and also have sensitivity to light of any wavelength in the spectral sensitivity wavelength range of the cyan image forming layer.

In one preferred embodiment of the present invention, for example, the yellow image-forming layer contains a blue-sensitive emulsion, the magenta image-forming layer contains a green-sensitive emulsion, and the cyan image-forming layer contains a red-sensitive emulsion. The emulsion contains an emulsion, and the black image forming layer contains an emulsion sensitive to any of blue light, green light and red light.

Such an emulsion can be realized by selecting a spectral sensitizing dye. For example, an emulsion having sensitivity to any of blue light, green light, and red light as described above can be prepared, for example, by combining an emulsion having sensitivity to blue with a green-sensitizing dye and a red-sensitizing dye. .

The magenta image forming layer of the present invention may be composed of a single silver halide emulsion layer or a plurality of silver halide emulsion layers having substantially the same spectral sensitivity. .. In one preferred embodiment of the invention, the magenta imaging layer contains at least one magenta imaging coupler and at least one yellow imaging coupler.

As the magenta dye-forming coupler used in the present invention, known 5-pyrazolone type couplers, pyrazolobenzimidazole type couplers, pyrazoloazole type couplers, open chain acylacetonitrile type couplers, indazolone type couplers and the like can be used. it can.

As the magenta coupler contained in the magenta image forming silver halide emulsion layer in the present invention, a magenta coupler represented by the following general formula [MI] is particularly preferable.

[0093]

[Chemical 9]

In the formula, Z represents a non-metal atom group necessary for forming a nitrogen-containing heterocycle, and the ring formed by Z may have a substituent.

X represents a hydrogen atom or a group capable of splitting off upon reaction with an oxidized product of a color developing agent. R represents a hydrogen atom or a substituent.

In the above general formula [MI], the substituent represented by R is not particularly limited, but is typically alkyl, aryl, anilino, acylamino, sulfonamide, alkylthio, arylthio, alkenyl, cycloalkyl. Other groups such as halogen atom and cycloalkenyl, alkynyl, heterocycle, sulfonyl, sulfinyl, phosphonyl, acyl, carbamoyl, sulfamoyl, cyano, alkoxy, aryloxy, heterocycleoxy, siloxy, acyloxy, and the like. Carbamoyloxy, amino, alkylamino, imide, ureido, sulfamoylamino, alkoxycarbonylamino, aryloxycarbonylamino, alkoxycarbonyl, aryloxycarbonyl, heterocyclic thio groups, and spiro. A compound residue, a bridged hydrocarbon compound residue, etc. are also mentioned.

The substituent represented by R, the group represented by X which can be released by the reaction with the oxidation product of the color developing agent, the nitrogen-containing heterocycle formed by Z and the ring formed by Z may have. The preferred range and specific examples of the substituents, and the preferred range of the magenta coupler represented by the general formula [MI] are described in European Patent Publication No. 0327272, page 5, line 23 to page 8, line 52. Is the same as

Typical examples of the magenta coupler represented by the formula [MI] are shown below.

[0099]

[Chemical 10]

[0100]

[Chemical 11]

[0101]

[Chemical 12]

[0102]

[Chemical 13]

[0103]

[Chemical 14]

As another specific example, European Published Patent No. 02
73712 Nos. 6 to 21 Compounds M-1 to 21
M-61 and No. 0235913, pages 36 to 92, and compounds 1-223 other than the above-mentioned representative examples.

Further, the coupler is a Journal of the Chemical Society.
ciety), Perkin I (1977), 2047-2052, US Pat. No. 3,725,067, JP-A-59-99437, 58-42045.
No. 59, No. 162548, No. 59-171956, No. 60-33552, No. 60-33552
60-43659, 60-172982, 60-190779, 62-20945
It can be synthesized with reference to No. 7 and No. 63-307453.

[0106] aforementioned couplers can also be used with other types of magenta couplers, usually 1 mol of silver halide per 1 × 10 ^-3 mol to 1 mol, preferably 1 × 10 ^-2 mol to 8 × 10 ^- It can be used in the range of ¹ mol.

In the present invention, a yellow dye forming coupler can be contained in the magenta image forming layer, and as the yellow dye forming coupler contained in the magenta image forming layer, known acylacetanilide type couplers are preferably used. You can Among these, benzoylacetanilide compounds and pivaloylacetanilide compounds are advantageous.

In the present invention, the yellow coupler contained in the magenta image forming layer is particularly preferably a coupler represented by the following general formula [Y-I]. Particularly preferred among the couplers represented by the general formula [Y-I] are couplers having a pKa value not lower than 3 by the pKa value of the magenta coupler to be combined.

[0109]

[Chemical 15]

In the general formula [Y-1], R ₁ represents a halogen atom or an alkoxy group.

R ₂ represents a hydrogen atom, a halogen atom or an alkoxy group which may have a substituent. R ₃ is an optionally substituted acylamino group, alkoxycarbonyl group, alkylsulfamoyl group, arylsulfamoyl group, arylsulfonamide group, alkylureido group, arylureido group, succinimide group, alkoxy Represents a group or an aryloxy group.

Z ₂ represents a hydrogen atom, a monovalent organic group or a halogen atom which can be released upon coupling the oxidant of the color developing agent.

Typical examples of the yellow coupler represented by the general formula [Y-I] include No. 13 of JP-A-2-139542.
Compounds (Y-1) to (Y-58) shown from the upper left of the page to the lower left of the page 17 are mentioned.

The content ratio of the magenta coupler and the yellow coupler in the magenta image forming layer of the silver halide photographic light-sensitive material of the present invention is such that the spectral absorption of the dye image obtained by color development processing of the magenta image forming layer is magenta. It may be determined so as to approximate the spectral absorption of the printed image by the printing ink. Specifically, the range of 0.02 to 0.5 mol of the yellow coupler is usually suitable for 1 mol of the magenta coupler.

The yellow image forming layer, the magenta image forming layer, the cyan image forming layer and the black image forming layer of the present invention are laminated and coated on a support, but the order from the support may be any order.

One preferable embodiment is, for example, a cyan image forming layer, a magenta image forming layer, from the side closer to the support,
It becomes a yellow image forming layer and a black image forming layer. In addition to these, an intermediate layer, a filter layer, a protective layer and the like can be arranged as required.

The fog treatment in the present invention can be carried out by exposing the entire surface or using a compound which produces fog nuclei, that is, a fog agent.

The whole surface exposure is carried out by immersing the imagewise exposed light-sensitive material in a developing solution or other aqueous solution or moistening it and then uniformly exposing the whole surface. The light source used here may be any light source as long as it has light in the photosensitive wavelength region of the photographic light-sensitive material,
Further, high illuminance light such as flash light may be applied for a short time, or weak light may be applied for a long time. Further, the time of the whole surface exposure can be varied within a wide range so as to finally obtain the best positive image, depending on the photographic light-sensitive material, the development processing conditions, the kind of the light source used and the like. Further, it is most preferable that the exposure amount of the whole surface exposure gives a certain range of exposure amount in combination with the photosensitive material. Usually, if the exposure amount is excessively increased, the minimum density is increased or desensitized, and the image quality tends to be deteriorated.

Next, the fog agent preferably used in the present invention will be described.

A wide variety of compounds can be used as the fog agent used in the present invention, and the fog agent only needs to be present at the time of development processing. For example, in the constituent layers other than the support of the photographic light-sensitive material (among them, In particular, it is preferably in a silver halide emulsion layer) or may be contained in a developing solution or a processing solution prior to the development processing. The amount used can be varied over a wide range according to the purpose, and the preferable amount added is when the amount is added to the silver halide emulsion layer.
1-1,500 mg, preferably 10 per mol of silver halide
~ 1,000 mg. When it is added to a processing solution such as a developing solution, the preferable addition amount is 0.01 to 5 g / l, particularly preferably
It is 0.05-1 g / l.

Examples of the fogging agent used in the present invention include hydrazines described in US Pat. Nos. 2,563,785 and 2,588,982, or hydrazides or hydrazine compounds described in US Pat. No. 3,227,552; US Pat.
615, 3,718,479, 3,719,494, 3,734,738 and 3,759,901 and heterocyclic quaternary nitrogen salt compounds; further silver halides such as acylhydrazinophenylthioureas described in U.S. Pat. No. 4,030,925. Examples thereof include compounds having an adsorption group on the surface. Further, these fogging agents can be used in combination. For example, RD mentioned above
15162 describes that a non-adsorption type fogging agent is used in combination with an adsorption type fogging agent, and this combination technique is also effective in the present invention. As the fogging agent used in the present invention, either an adsorption type or a non-adsorption type can be used, or they can be used in combination.

Specific examples of useful fogging agents include hydrazine hydrochloride, 4-methylphenylhydrazine hydrochloride, 1-acetyl-2-phenylhydrazine, 1-formyl-2- (4-methylphenyl) hydrazine, 1 Hydrazine compounds such as -methylsulfonyl-2-phenylhydrazine, 1-methylsulfonyl-2- (3-phenylsulfonamidophenyl) hydrazine, 1-benzoyl-2-phenylhydrazine and formaldehydephenylhydrazine; 3- (2-formylethyl ) -2-Methylbenzothiazolium bromide, 3- (2-acetylethyl) -2-benzyl-5-phenylbenzoxazolium bromide, 3- (2-acetylethyl) -2-benzylbenzoselenazolium bromide , 2-methyl-3- [3- (phenylhydrazino) propyl] benzothiazolium bromide, 1,2
-Dihydro-3-methyl-4-phenylpyrido [2,1-b] benzothiazolium bromide, 1,2-dihydro-3-methyl-4-phenylpyrido [2,1-b] benzoselenazolium bromide,
4,4'-Ethylenebis (1,2-dihydro-3-methylpyrido [2,1
-b]) N-substituted quaternary cycloammonium salts such as benzothiazolium bromide; 5- (3-ethyl-2-benzothiazolinylidene) -3- [4- (2-formylhydrazino) phenyl ] Rhodanine, 1,3-bis [4- (2-formylhydrazino) phenyl] thiourea, 7- (3-ethoxythiocarbonylaminobenzamide) -9-methyl-10-propargyl-1,2,3,4 -Ratlahydroacridinium trifluoromethanesulfonate, 1-formyl-2- [4- {3- (2-methoxyphenyl) ureido} phenyl] hydrazine and the like can be mentioned.

The photographic light-sensitive material having a silver halide emulsion layer according to the present invention forms a positive image directly by imagewise exposure followed by overall exposure or development in the presence of a fogging agent.

The developer usable in the developer used for developing the photographic light-sensitive material according to the present invention is:
Conventional silver halide developers, for example, polyhydroxybenzenes such as hydroquinone, aminophenols, 3-
Pyrazolidones, ascorbic acid and its derivatives, reductones, phenylenediamines, etc., or mixtures thereof are included. Specifically, hydroquinone, aminophenol, N-methylaminophenol, 1-phenyl-3-pyrazolidone, 1-phenyl-4,4-dimethyl-3-pyrazolidone,
1-phenyl-4-methyl-4-hydroxymethyl-3-pyrazolidone, ascorbic acid, N, N-diethyl-p-phenylenediamine, diethylamino-o-toluidine, 4-amino-3-methyl-N-ethyl-N -(β-Methanesulfonamidoethyl) aniline, 4-amino-3-methyl-N-ethyl-N- (β-hydroxyethyl) aniline, 4-amino-N-ethyl-N- (β-hydroxyethyl) aniline Etc. It is also possible to include these developers in the emulsion in advance so that they act on the silver halide during the immersion in the high pH aqueous solution.

The developer used in the present invention may further contain a specific antifoggant and development inhibitor, or these developer additives may be optionally incorporated in the constituent layers of the photographic light-sensitive material. Is also possible.

Known photographic additives can be used in the silver halide photographic light-sensitive material of the present invention.

Known photographic additives include, for example, the compounds described in RD17643 and RD18716 shown in the table below.

Additive RD17643 RD18716 Page Classification Page Classification Chemical sensitizer 23 III 648 Upper right sensitizing dye 23 IV 648 Upper right development accelerator 29 XXI 648 Upper right antifoggant 24 VI 649 Lower right stabilizer Stabilization 〃 Color contamination prevention Agent 25 VII 650 Left-right Image stabilizer 25 VII UV absorber 25-26 VII 649 Right-650 left Filter dye 〃 〃 Whitening agent 24 V Hardener 26 X 651 Right Coating aid 26-27 XI 650 Right interface Activator 26 to 27 XI 650 Right Plasticizer 27 XII 650 Right Sliding agent 〃 〃 Static inhibitor 〃 〃 Matting agent 28 XVI 650 Right binder 29 IX 651 Right In the emulsion layer of the light-sensitive material of the present invention, a color developing agent is used. A dye-forming coupler capable of forming a dye by a coupling reaction with an oxidant thereof can be used. The dye-forming couplers are usually selected for each emulsion layer so that a dye that absorbs the light in the light-sensitive spectrum of the emulsion layer is formed, and in the blue-sensitive emulsion layer the yellow dye-forming coupler is the green dye. A magenta dye forming coupler is used in the sensitive emulsion layer and a cyan dye forming coupler is used in the red sensitive emulsion layer. However, the silver halide color photographic light-sensitive material may be prepared by a method different from the above combination depending on the purpose.

It is desirable that these dye-forming couplers have a group called a ballast group having 8 or more carbon atoms, which makes the coupler non-diffusible in the molecule. Also, these dye-forming couplers need only reduce 4 molecules of silver ions in order to form 1 molecule of dye, but they need only reduce 2 molecules of silver ion even if they are 4 equivalence. Either of two equivalence may be used. Releases a development inhibitor along with development, releases a development inhibitor at the same time as a DIR coupler that improves image sharpness and image graininess, and produces a colorless compound by coupling reaction with an oxidized product of a developing agent. DIR compounds may be used.

The DIR coupler and the DIR compound used had an inhibitor bound directly to the coupling position and an inhibitor bound to the coupling position via a divalent group, and were released by the coupling reaction. Those which are bonded so as to release the inhibitor by intramolecular nucleophilic reaction, intramolecular electron transfer reaction and the like (referred to as timing DIR coupler and timing DIR compound) are included.

A colorless coupler (also referred to as a competing coupler) which undergoes a coupling reaction with an oxidized product of an aromatic primary amine developer but does not form a dye can be used in combination with the dye-forming coupler.

As the cyan dye forming coupler of the cyan image forming layer, known phenol type, naphthol type or imidazole type couplers can be used.

For example, a phenol-based coupler substituted with an alkyl group, an acylamino group, a ureido group, or the like,
Typical examples are naphthol-based couplers formed from a 5-aminonaphthol skeleton and 2-equivalent naphthol-based couplers having an oxygen atom introduced as a leaving group.

The support which can be used in the light-sensitive material of the present invention includes, for example, RD17643, page 28, and R
Examples include those described on page 647 of D18716. Suitable supports are polymer films, papers and the like, which may be treated for enhancing the adhesiveness, antistatic property and the like.

[0135]

The present invention will be described in detail below with reference to examples, but the present invention is not limited thereto.

Example 1 Preparation of Emulsion EM-1 While controlling the aqueous solution containing ossein gelatin at 40 ° C.,
An aqueous solution containing ammonia and silver nitrate and an aqueous solution containing potassium bromide and sodium chloride (in molar ratio KBr: NaCl = 95: 5) were simultaneously added by the control double jet method to give a cubic salt odor having a particle size of 0.30 μm. A silver halide core emulsion was obtained. At that time, p so that a cubic shape is obtained as the particle shape.
H and pAg were controlled. An aqueous solution containing ammonia and silver nitrate and an aqueous solution containing potassium bromide and sodium chloride (in a molar ratio of KBr: NaCl = 40: 60) were simultaneously added to the obtained core emulsion by a control double jet method to obtain an average grain size. The shell was formed to a diameter of 0.42 μm.
At that time, pH and pAg were controlled so as to obtain a cubic particle shape.

After washing with water to remove the water-soluble salt, gelatin was added to obtain an emulsion EM-1. The breadth of distribution of this emulsion EM-1 was 8%.

(Preparation of Blue Sensitive Emulsion EM-B) After sensitizing with sensitizing dye D-1, 600 mg of T-1 was added per mol of silver to EM-1 to prepare blue sensitive emulsion EM-B. ..

(Preparation of Green Sensitive Emulsion EM-G) A green sensitive emulsion EM-G was prepared in the same manner as the blue sensitive emulsion except that the sensitizing dye D-2 was added to EM-1 for color sensitization.

(Preparation of Red Sensitive Emulsion EM-R) Red sensitive emulsion EM-R was prepared in the same manner as blue sensitive emulsion except that sensitizing dyes D-3 and D-4 were added to EM-1 for color sensitization. It was made.

(Preparation of pan-sensitive emulsion EM-P) Same as the blue-sensitive emulsion except that sensitizing dyes D-1, D-2, D-3 and D-4 were added to EM-1 for color sensitization. To produce a pan-sensitive emulsion EM-P.

(Preparation of Infrared Sensitive EM-I) A pan-sensitive emulsion EM-I was prepared in the same manner as the blue-sensitive emulsion except that the sensitizing dye D-5 was added to EM-1 for color sensitization.

The above EM-B, EM-G, EM-R and EM-
The first layer to the tenth layer were applied to the surface of a support, which was laminated on both sides with polyethylene using P, in the following constitution. still,
Samples 1 to 9 were prepared using SA-1 and SA-2 as coating aids and H-1 as a hardening agent.

Layer composition Coating amount (g / m ² ) 10th layer Gelatin 0.78 (UV absorbing layer) UV absorber (UV-1) 0.065 UV absorbing layer (UV-2) 0.195 Solvent (SO-2) 0.1 Colloidal Silica 0.03 9th layer Gelatin 1.05 (pan-sensitive layer) Pan-sensitive emulsion EM-P (amount of coated silver) 0.30 Yellow coupler (Table 1) Magenta coupler (Table 1) Cyan coupler (Table 1) Solvent (SO-1) 615 Eighth layer gelatin 0.75 (Intermediate layer) Anti-color mixing agent (AS-1) 0.055 Solvent (SO-2) 0.072 Seventh layer gelatin 1.14 (Blue sensitive layer) Blue sensitive emulsion EM-B (Coated silver amount) 0.4 Yellow coupler (YC-1) 0.656 Anti-stain agent (AS-2) 0.02 Solvent (SO-1) 0.656 Inhibitor (ST-1, ST-2, T-1) 6th layer Gelatin 0.54 (Intermediate layer) Color mixture prevention Agent (AS-1) 0.055 Solvent (SO-2) 0.072 Fifth layer Gelatin 0.42 (Yellow yellow colloidal silver 0.1 colloidal silver layer) Anti-color mixing agent (AS-1) 0.04 Solvent (SO-2) 0.049 Polyvinylpyrrolidone (PVP) 0.047 4th layer gelatin 0.54 (Intermediate layer) Anti-color mixing agent (AS-1) ) 0.055 Solvent (SO-2) 0.072 Third layer Gelatin 1.14 (Green-sensitive layer) Green-sensitive emulsion EM-G (Coating silver amount) 0.40 Magenta coupler (MC-1) 0.25 Yellow coupler (YC-1) 0.06 Anti-stain agent (AS-2) 0.0152 Solvent (SO-1) 0.248 Inhibitor (ST-1, ST-2, T-1) Second layer Gelatin 0.75 (Intermediate layer) Color mixture inhibitor (AS-1) 0.055 Solvent ( SO-2) 0.072 1st layer Gelatin 1.10 (red sensitive layer) Red sensitive emulsion EM-R (amount of coated silver) 0.24 Cyan coupler (CC-1, CC-2 equimolar) 0.352 Solvent (SO-1) 0.248 Stain prevention Agent (AS-2) 0.012 Inhibitor (ST-1, ST-2, T-1) In the same manner as in Samples 1 to 9 above, EM-B, EM-
Using G, EM-R, and EM-I, a silver halide color photographic light-sensitive material sample-10 having the following constitution was prepared.

Layer composition Coating amount (g / m ² ) 10th layer Gelatin 0.78 (UV absorbing layer) UV absorber (UV-1) 0.065 UV absorbing layer (UV-2) 0.195 Solvent (SO-2) 0.1 Colloidal Silica 0.03 9th layer Gelatin 1.14 (Blue sensitive layer) Blue sensitive emulsion EM-B (Coating silver amount) 0.4 Yellow coupler (YC-1) 0.656 Anti-staining agent (AS-2) 0.02 Solvent (SO-1) 0.656 Inhibitor (ST-1, ST-2, T-1) Eighth layer Gelatin 0.54 (Intermediate layer) Anti-color mixing agent (AS-1) 0.055 Solvent (SO-2) 0.072 Seventh layer gelatin 0.42 (Yellow yellow colloid silver 0.1 colloid Silver layer) Anti-color mixing agent (AS-1) 0.04 Solvent (SO-2) 0.049 Polyvinylpyrrolidone (PVP) 0.047 6th layer Gelatin 0.54 (Intermediate layer) Anti-color mixing agent (AS-1) 0.055 Solvent (SO-2) 0.072 5th layer Gelatin 1.14 (Green-sensitive layer) Green-sensitive Agent EM-G (Amount of coated silver) 0.40 Magenta coupler (MC-1) 0.25 Yellow coupler (YC-1) 0.06 Anti-stain agent (AS-2) 0.0152 Solvent (SO-1) 0.248 Inhibitor (ST-1, ST -2, T-1) 4th layer Gelatin 0.75 (Intermediate layer) Anti-color mixing agent (AS-1) 0.055 Solvent (SO-2) 0.072 3rd layer Gelatin 1.10 (Red sensitive layer) Red sensitive emulsion EM-R (Coating) Silver amount) 0.24 Cyan coupler (CC-1, CC-2 equimolar) 0.352 Solvent (SO-1) 0.248 Anti-staining agent (AS-2) 0.012 Inhibitor (ST-1, ST-2, T-1) No. Two-layer gelatin 0.75 (intermediate layer) Anti-color mixing agent (AS-1) 0.055 Solvent (SO-2) 0.072 First layer gelatin 1.05 (infrared photosensitive layer) Infrared photosensitive emulsion EM-I (amount of coated silver) 0.30 yellow Coupler (Table 1) Magenta Coupler (Table 1) Cyan Coupler (Table 1) Solvent (SO-1) 0.615 Shows the compounds used in the layer below.

[0146]

[Chemical 16]

[0147]

[Chemical 17]

[0148]

[Chemical 18]

[0149]

[Chemical 19]

[0150]

[Chemical 20]

[0151]

[Chemical 21]

[0152]

[Chemical formula 22]

[0153]

[Chemical formula 23]

[0154]

[Chemical formula 24]

Samples 1 to 9 obtained as described above include a chart portion in which the halftone dot area is changed from 0% to 100% for each image of black, yellow, magenta and cyan with 175 lines. Of the original halftone dots, the black plate and the cyan plate were brought into close contact with each other and exposed under the exposure condition-1 shown below. Then, the black plate and the magenta plate were brought into close contact with the sample and exposed under the exposure conditions-2 shown below. Then, the black plate and the yellow plate were brought into close contact with the sample and exposed under the exposure condition-3 shown below.

Further, for another sample piece of Sample-1 to 9,
The same exposure as above was performed. However, instead of the exposure conditions-1 to 3 above, the exposure amount from exposure condition-1 to exposure condition-3 was reduced to 85% for each exposure, and the same procedure was followed. It was

Next, the prepared Sample-10 was exposed under the exposure conditions 1 to 3 in the same manner as in Samples 1 to 9, and only the black plate of the original document was brought into close contact with it. Exposed.

Further, another sample piece of Sample-10 was exposed in the same manner as above. However, instead of the exposures from exposure conditions-1 to 4 above, exposure conditions-1 to 4
Exposure is reduced to 85% for each exposure.
Other than that, it went in the same way.

The exposed light-sensitive material thus obtained was processed by the development processing steps shown below to obtain a 90% halftone dot image and a 10% halftone dot halftone dot image in the black image area. Table 2 shows the results of the five-level evaluation of quality.

(Exposure condition-1) Each of the light-sensitive materials was passed through a red filter (Ratten No. 26) and an ND filter to adjust the ND filter density when white light was exposed.
Exposure is performed for 0.5 seconds with the minimum exposure amount that minimizes the red light density after the development processing described below.

(Exposure condition-2) Each light-sensitive material was passed through a green filter (Ratten No. 58) and an ND filter to adjust the ND filter density when white light was exposed.
Exposure is performed for 0.5 seconds with the minimum exposure amount that minimizes the green light density after the development processing described below.

(Exposure condition-3) Each of the light-sensitive materials was passed through a blue filter (Ratten No. 47B) and an ND filter, and when the white light was exposed, the ND filter density was adjusted, and the green light density after the following development processing was performed. Exposure is performed for 0.5 seconds with the minimum exposure amount that minimizes.

(Exposure condition-4) For each sample in which each light-sensitive material was sequentially exposed under the above-mentioned exposure conditions-1 to 3, the ND filter density was changed when the tungsten light was exposed through an infrared filter and an ND filter. After adjustment, exposure is performed for 0.5 seconds with the minimum exposure amount that minimizes the visible light density after the development processing described below. Only the exposure through the infrared filter is exposure condition-4. A daylight fluorescent lamp was used as the light source under the exposure conditions-1 to 3.

Processing was performed according to the following processing steps to obtain a photographic image. However, fog exposure is still immersed in the developer,
The entire surface of the photosensitive material was uniformly exposed through a developer layer having a thickness of 3 mm.

Processing Step-1 Temperature Time Immersion (Developer) 37 ° C 12 seconds Fog exposure-12 seconds (1 lux) Development 37 ° C 95 seconds Bleach-fixing 35 ° C 45 seconds Stabilization 25-30 ° C 90 seconds Dry 60- 85 ℃ 40sec. Processing composition (color developer) Benzyl alcohol 15ml Ce2 (SO4) 3 0.015g Ethylene glycol 8.0ml Potassium sulfite 2.5g Potassium bromide 0.6g Sodium chloride 0.2g Potassium carbonate 25.0g T-1 0.1g Hydroxylamine Sulfate 5.0 g Diethylenetriamine 5 sodium acetate 2.0 g 4-Amino-N-ethyl-N- (β-hydroxyethyl) aniline sulfate 4.5 g Optical brightener (4,4'-diaminostilbene disulfonic acid derivative) 1.0 g Water Potassium oxide 2.0 g Diethylene glycol 15.0 ml Water is added to bring the total volume to 1 l, and the pH is adjusted to 10.15.

(Bleach-fixing solution) Diethylenetriamine 5 ferric ammonium acetate 90.0 g Diethylenetriamine 5 acetic acid 3.0 g Ammonium thiosulfate (70% aqueous solution) 180 ml Ammonium sulfite (40% aqueous solution) 27.5 ml 3-Mercapto-1,2,4-triazole Adjust the pH to 7.1 with 0.15 g potassium carbonate or glacial acetic acid and add water to make the total volume 1 l. (Stabilizing solution) O-Phenylphenol 0.3g Potassium sulfite (50% aqueous solution) 12ml Ethylene glycol 10g 1-Hydroxyethylidene-1,1-disulfonic acid 2.5g Bismuth chloride 0.2g Zinc sulfate 7-hydrate 0.7g Ammonium hydroxide (28% aqueous solution) 2.0 g Polyvinylpyrrolidone (K-17) 0.2 g Optical brightener (4,4'-diaminostilbene disulfonic acid derivative) 2.0 g Water is added to make the total volume 1 l, and pH is adjusted with ammonium hydroxide or sulfuric acid. To 7.5. In addition,
The stabilization treatment was a countercurrent system with a two-tank configuration.

[0167]

[Table 1]

[0168]

[Table 2]

The evaluation value is a numerical value of 5 grades from 5 (excellent) to 1 (poor) of halftone dot quality. The value of the sensitivity difference represents the sensitivity difference obtained by the test method described in the detailed description of the present invention.

As is clear from the results of Table 2, the comparative sample is inferior in the dot quality of small dots, and the dot quality is significantly deteriorated when the exposure amount is reduced to 85%, and it becomes unusable for practical use.
On the other hand, with the sample of the present invention, the dot quality at small dots is good, and even if the exposure dose fluctuates and decreases, the deterioration of dot quality can be suppressed to a small level.

Example 2 (Preparation of Emulsion EM-2) An equimolar silver nitrate aqueous solution and potassium bromide aqueous solution were simultaneously added to a gelatin aqueous solution at 50 ° C. for 50 minutes by the double jet method to give an average particle size of 0.3.
An emulsion consisting of cubic silver bromide grains was obtained. To this emulsion, 6.5 mg of sodium thiosulfate and 3 mg of potassium chloroaurate were added per 1 mol of silver, and the mixture was chemically ripened at 70 ° C. for 70 minutes. (Molar ratio 1: 9) are added simultaneously,
A cubic core / shell type emulsion comprising a silver bromide core and a silver chlorobromide shell having an average particle size of 0.45 μm was prepared. After washing and desalting,
2.0 mg of sodium thiosulfate per mol of silver was added to this emulsion.
1.0 mg of potassium chloroaurate was added and chemical ripening was carried out at 60 ° C. for 50 minutes to obtain a direct positive silver halide emulsion EM-2. The breadth of distribution of this emulsion EM-2 was 12%.

(Preparation of Blue Sensitive Emulsion EM-2B) EM-2
After sensitizing with the sensitizing dye D-1, T-1 was added in an amount of 60 per mol of silver.
A blue-sensitive emulsion EM-2B was prepared by adding 0 mg of FA-1 and 8 × 10 ^-5 mol of FA-1 and 5 × 10 ^-4 mol of FA-2 per mol of silver.

(Preparation of Green Sensitive Emulsion EM-2G) In EM-2,
A green-sensitive emulsion EM-2G was prepared in the same manner as the green-sensitive emulsion except that the sensitizing dye D-2 was added for color sensitization.

(Preparation of Red Sensitive Emulsion EM-2R) In EM-2,
A red-sensitive emulsion EM-2R was prepared in the same manner as the green-sensitive emulsion except that the sensitizing dyes D-3 and D-4 were added for color sensitization.

(Preparation of pan-sensitive emulsion EM-2P) In EM-2,
A general-purpose emulsion EM-2P was prepared in the same manner as the blue-sensitive emulsion except that the sensitizing dyes D-1, D-2, D-3 and D-4 were added for color sensitization.
Was produced.

(Preparation of Sample-11) Sample-11 was prepared in the same manner as Sample-4 of Example 1 above. However, except that EM-2B, EM-2G, EM-2R, and EM-2P were used instead of EM-B, EM-G, EM-R, and EM-P used in Sample-4, respectively- In the same manner as in 4, a silver halide color photographic light-sensitive material sample-11 was prepared.

The obtained sample was exposed in the same manner as in Sample-4 of Example 1, and then processed according to the following Process Step-2.

(Processing step-2) The developing solution, the bleach-fixing solution and the stabilizing solution used herein had the same formulation as that used in Example 1.

The stabilization treatment was a countercurrent system having a two-tank construction.

The obtained image was able to obtain good halftone dot reproduction quality as in the case of the sample of the present invention of Example 1.

[0181]

According to the present invention, the dot quality at small dots is excellent,
A color proof similar to the image quality of printed matter can be obtained, and productivity can be improved.

Claims (3)

[Claims] 1. At least one yellow image-forming silver halide emulsion layer having internal latent image type silver halide grains and having different spectral sensitivities, and at least one magenta image-forming silver halide on a support. An emulsion layer, and at least one cyan image-forming silver halide emulsion layer,
And a direct positive silver halide color photographic light-sensitive material having at least one black image forming silver halide emulsion layer containing internal latent image type silver halide grains, the black image forming silver halide emulsion layer is at least 1 Type cyan coupler, at least one magenta coupler and at least one yellow coupler, and said three color coupler groups form a light-sensitive material on a reflective support in which they are added to a single emulsion layer. Then, after developing with a developing solution containing an aromatic amine developer, it is processed in a bleach-fixing process, and sensitometry is performed to measure the red light density, green light density and blue light density, and the middle density part When the compounding ratios of the couplers are adjusted so that the gamma balances are equal, the coupler groups are such that the apparent sensitivity difference expressed by the logarithm of the three colors is within 0.10. A direct positive silver halide color photographic light-sensitive material characterized in that it is composed of 2. The black image forming silver halide emulsion layer has a spectral sensitivity region having a common portion with the spectral sensitivity region of the yellow image forming silver halide emulsion layer, and the magenta image forming halogen. Having a spectral sensitivity region having a common part with the spectral sensitivity region of the silver halide emulsion layer, and having a spectral sensitivity region having a common part with the spectral sensitivity region of the cyan image forming silver halide emulsion layer. The direct positive silver halide color photographic light-sensitive material according to claim 1, which is characterized in that. 3. A yellow image forming layer, a magenta image forming layer, and cyan on a support based on halftone dot image information consisting of color-separated yellow image information, magenta image information, cyan image information and black image information. In the step of exposing a direct positive silver halide color photographic light-sensitive material having an image forming layer and a black image forming layer to produce a color proof, the direct positive silver halide color photographic light-sensitive material is the above-mentioned claim 1 or Item 3. A method for producing a color proof, which is a direct positive silver halide color photographic light-sensitive material.