JPH11149143A - Image forming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming method improved in roughness feeling at the time of appreciating print images in a intensifying development processing. SOLUTION: A silver halide color photographic sensitive material is provided with at least each one of yellow, magenta, and cyan image forming silver halide emulsion layers on a support, and it is subjected to intensified development processing. When a color developing density of a coupler in at least one of the color image forming layers is in the range of 0.2-1.5, the ratio of color developing density to number of developed silver grains in 1.0×10<-8> m<2> is <=2.0×10<-2> .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an image forming method suitable for rapid processing, and more particularly to an image forming method with less roughness when viewing a printed image in amplification development processing.

[0002]

2. Description of the Related Art Silver halide photographic light-sensitive materials are very popular today because they have very high characteristics, such as high sensitivity and excellent gradation, as compared with other light-sensitive materials. It is used for

[0003] These silver halide photographic light-sensitive materials (hereinafter, referred to as the
This is also a feature that requires only a small amount of silver halide in the light-sensitive material and is a preferable means in terms of effective use of resources. The method of forming has been known for a long time. As an example of the amplification development processing, there is a method in which an oxidized color developing agent is generated with an oxidizing agent such as hydrogen peroxide or a cobalt (III) complex using developed silver as a catalyst, and then an image dye is formed by reaction with a coupler. .

It is generally known that when image information recorded on a film is printed on paper by enlargement projection, the graininess of the film greatly affects the graininess of a printed image. However, in the amplification and development processing of a light-sensitive material having a small amount of silver halide applied,
As the amount of silver halide is reduced, the effect of the graininess of the film on the graininess at the time of appreciating the printed image becomes smaller, and the graininess of the paper increases the graininess at the time of directly appreciating the printed image. come. Therefore, in the image forming method by the amplification development processing, the granularity is apt to be deteriorated, and the mechanism of the generation is different from the conventional photographic system. The feeling is likely to occur, and improvement has been desired.

[0005] In order to reduce the amount of silver halide and reduce the roughness when viewing printed images, it is preferable to make the particle size of the silver halide particles as small as possible. As the sensitivity becomes lower, the size of silver halide grains is limited.

JP-A-6-301128 suggests that tabular silver halide grains can be used to reduce the deterioration of graininess when the amount of silver halide is reduced. Examples in which tabular silver halide grains are applied to the emulsion layer are described in Examples.
However, although the graininess of the yellow image is improved by using the tabular silver halide grains in the silver halide emulsion layer for forming the yellow image, the improvement in roughness of the printed image reproducing the gray image is not satisfactory. Absent.

During the course of their research, the present researchers have found that when the ratio between the color density of each color image forming layer and the number of developed silver particles satisfies a certain specific condition, the roughness of the printed image when viewed is reduced. This has led to the achievement of the present invention.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming method capable of improving the roughness at the time of appreciating a printed image in an amplification and development process.

[0009]

The above objects of the present invention have been attained by the following constitutions.

(1) A silver halide photographic material having at least one yellow image forming silver halide emulsion layer, a magenta image forming silver halide emulsion layer and a cyan image forming silver halide emulsion layer on a support. In the image forming method in which amplification and development are performed, when the color density of the coupler in at least one of the color image forming layers is between 0.2 and 1.5, the color density of 1.0 × 10 ⁻⁸ m ² is obtained. An image forming method wherein the ratio of the toner to the number of developed silver particles is 2.0 × 10 ⁻² or less.

(2) The image forming method according to (1), wherein the image forming layer has at least one coupler having a molar extinction coefficient ε of the coloring dye of 20,000 or more.

(3) The total amount of silver halide coated on the support of the silver halide photographic light-sensitive material is 0.01 to 0.3 g / m ² in terms of silver. The image forming method according to the above (1) or (2).

Hereinafter, the present invention will be described in detail. Silver halide photographic light-sensitive material according to the present invention (hereinafter referred to as light-sensitive material)
Has at least a yellow image-forming silver halide emulsion layer, a magenta image-forming silver halide emulsion layer, and a cyan image-forming silver halide emulsion layer on a support. 1.0 × 10 ⁻⁸ m when the color density is between 0.2 and 1.5
^The ratio of No. ^{2 to the} number of developed silver particles was 2.0 × 10 ^−2.
It is characterized by the following.

The number of developed silver particles per unit area of each layer is as follows:
It can be measured by various methods commonly used in the art. For example, after imagewise exposure subjected to development and stop processing, a photosensitive material that has not been desilvered such as bleaching and dissolving, after performing a fixed area release processing for each layer,
Electron micrographs can be taken, and the developed silver particles or silver halide particles forming the developed silver contained in each layer can be directly counted, and can be easily performed by image processing using a computer. . Further, after development, the light-sensitive material obtained by dissolving silver halide without bleaching may be subjected to release treatment for each layer, and then observed using an optical microscope.

In the light-sensitive material according to the present invention, when a certain color image forming silver halide emulsion layer comprises a plurality of layers such as a high-speed layer and a low-speed layer, the color image-forming silver halide emulsion The sum of the number of developed silver particles per unit area of the plurality of layers constituting the layer is defined as the number of developed silver particles per unit area of the color image forming silver halide emulsion layer.

In the present invention, the color density of the yellow image forming layer is defined as the spectral reflection density at the maximum spectral absorption wavelength in the wavelength range of 400 to 500 nm. Similarly, the color forming density of the magenta image forming layer is the spectral reflection density at the spectral absorption maximum wavelength in the wavelength range of 500 to 600 nm, and the color developing density of the cyan image forming layer is the spectral reflection density at the spectral absorption maximum wavelength in the wavelength range of 600 to 700 nm. Is defined as

In the light-sensitive material used in the present invention, the color-forming density of the coupler in the image forming layer containing at least one kind of dye image-forming coupler having a molar extinction coefficient of 20,000 or more is 0.2 to 1.5. When the ratio is between 1.0 and 10 × 10 ⁻⁸ m ² , the ratio to the number of developed silver particles is preferably 2.0 × 10 ⁻² or less. When a coupler having a molar extinction coefficient ε of 20,000 or more is used, the contribution ratio of the individual developed silver particles to the color density tends to be very large, and the graininess at the time of appreciating a printed image is particularly likely to occur. However, ε of the coloring dye is 2
Even when the ratio becomes 0000 or more, when the ratio of the color density to the number of developed silver particles satisfies the relationship of the present invention, the roughness at the time of appreciating a printed image is remarkably improved.

The molar extinction coefficient of the coloring dye is determined by measuring the absorption spectrum of a solution prepared by dissolving a known amount of the coloring dye in an appropriate organic solvent (usually methanol) using a spectrophotometer. It is obtained by calculation from the absorbance at the maximum wavelength.

The composition of the silver halide photographic emulsion used in the present invention may be any halogen composition such as silver chloride, silver bromide, silver chlorobromide, silver iodobromide, silver chloroiodobromide, silver chloroiodide and the like. However, from the viewpoints of rapid processing, processing stability, and maintenance of amplification development activity, silver chloride is preferably contained in an amount of 80 mol% or more, more preferably 90 mol% or more, and still more preferably. Silver halide emulsions containing 95 mol% or more of silver chloride are preferred.

As the silver halide emulsion used in the present invention, a silver halide emulsion having a portion containing silver bromide at a high concentration can also be preferably used. In this case, the portion containing a high concentration of silver bromide may be a so-called core / shell emulsion in which a complete layer is formed, or a region in which the complete layer is not formed and the composition is merely partially present. In this case, what is called an epitaxy junction may be used.
Further, the composition may change continuously or discontinuously. It is particularly preferable that the portion where silver bromide is present at a high concentration is present at the top of silver halide grains.

The silver halide emulsion used in the present invention advantageously contains a heavy metal ion in order to improve various photographic properties. Examples of heavy metal ions that can be used for such purposes include Group 8 to 10 metals such as iron, iridium, platinum, palladium, nickel, rhodium, osmium, ruthenium, and cobalt; and twelfth metals such as cadmium, zinc, and mercury. Group ions and ions of lead, rhenium, molybdenum, tungsten, gallium, and chromium. Among them, iron, iridium, platinum,
Ruthenium, gallium and osmium metal ions are preferred.

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

When the heavy metal ion forms a complex, its ligand may be cyanide ion, thiocyanate ion, isothiocyanate ion, cyanate ion, or the like.
Examples include chloride ion, bromide ion, iodide 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 incorporate heavy metal ions into the silver halide emulsion used in the present invention, the heavy metal compound is added before forming silver halide grains, during forming silver halide grains,
It may be added at any place in each step during physical ripening after the formation of silver halide grains. In order to obtain a silver halide emulsion satisfying the above conditions, a heavy metal compound can be dissolved together with a halide salt and added continuously over the whole or a part of the grain forming step.

When the heavy metal ion is added to the silver halide emulsion, the amount is 1 × 10 ^-9 per mol of silver halide.
Mol or more and 1 × 10 ^-2 mol or less, particularly 1 mol
The amount is preferably from 10 ^-8 mol to 5 10 ^-4 mol.

The silver halide grains used in the present invention may have any shape. One preferable example is a cube having a {100} plane as a crystal surface. U.S. Pat. Nos. 4,183,756 and 4,22
5,666, JP-A-55-26589, and JP-B-55-55.
No. 42737 and the Journal of Photographic Science (J. Photogr. Sc.
i. ) Particles having shapes such as octahedron, tetrahedron, and dodecahedron can be prepared and used by methods described in documents such as 21, 39 (1973). Further, particles having a twin plane may be used.

As the silver halide grains used in the present invention, so-called tabular silver halide grains are preferably used in order to increase the sensitivity. Tabular grains containing silver chloride at a high concentration include grains having {111} major planes and {1}.
Particles having a {00} principal plane are known, but particles having a {100} principal plane are particularly preferably used in view of the stability of the particle shape.

The silver halide grains used in the present invention are:
Although grains having a single shape are preferably used, it is also preferable to add two or more monodispersed silver halide emulsions to the same layer. The monodisperse silver halide emulsion referred to here has a coefficient of variation of 0, which indicates the width of the particle size distribution of silver halide grains.
A silver halide emulsion having a coefficient of variation of 0.15 or less is preferred. The coefficient of variation 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 shape and grain size of the silver halide grains used in the present invention are not particularly limited. It is preferable that the average grain size of the silver halide grains is small because the stability of gradation reproduction with respect to the fluctuation of the oxidizing agent concentration in the amplification developer is high and the time for the bleaching / fixing process can be shortened. The average grain size of the silver halide grains according to the present invention is preferably 0.5 μm or less, and more preferably 0.4 μm or less.

In the present invention, when the silver halide grains are cubic, the grain size of the silver halide grains is one of the following.
The length of the side is used as the particle size of the silver halide grains. When the silver halide grains are not cubic (for example, tabular, tetradecahedral, octahedral, etc.), they are expressed using the diameter of a circle having the same projected area as the projected area of the grains. The aspect ratio is defined as a value obtained by dividing the particle size by the thickness of the particle. The particle volume of the photosensitive silver halide grains can be measured by various methods generally used in the art. A representative method is described in Loveland's “Particle Size Analysis Method” (ASTM Symposium on Right Microscopy, pp. 94-122, 19).
55) or "Theory of Photographic Process, 3rd Edition" (co-authored by Mies and James, Chapter 2, published by Macmillan, 19)
66).

As the apparatus and method for preparing a silver halide emulsion, various methods known in the art can be used. The silver halide emulsion used in the present invention may be obtained by any of an acidic method, a neutral method, and an 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 form in which the soluble silver salt and the soluble halide salt are reacted may be any of a forward mixing method, a reverse mixing method, a simultaneous mixing method, a combination thereof, and the like. 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, JP-A-57-92523.
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 German Offenlegungsschrift 2,921,164, etc. A device for continuously adding a salt and an aqueous solution of a water-soluble halide salt while changing the concentration,
No. 501776, etc., a reaction mother liquor may be taken out of a reactor and concentrated by an ultrafiltration method to form grains while keeping the distance between silver halide grains constant.

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 used in the present invention is:
A sensitization method using a gold compound and a sensitization method using a chalcogen sensitizer can be used in combination.

As the chalcogen sensitizer applied to the silver halide emulsion used in the present invention, a sulfur sensitizer, a selenium sensitizer, a tellurium sensitizer, and the like can be used.
Sulfur sensitizers are preferred.

The silver halide emulsion used in the present invention may be any of the known silver halide emulsions for the purpose of preventing fogging during the preparation of light-sensitive materials, reducing performance fluctuation during storage, and preventing fogging during development. Antifoggants and stabilizers can be used. Examples of preferred compounds that can be used for such purposes include JP-A-2-14636.
And the compound represented by the general formula (II) described in the lower column of page 7 of the publication.

These compounds are added according to the purpose in steps such as a step of preparing a silver halide emulsion, a step of chemical sensitization, a step at the end of the step of chemical sensitization, and a step of preparing a coating solution.

In the light-sensitive material used in the present invention, it is sufficient that silver halide grains are present in an amount necessary to produce developed silver which serves as a catalyst during amplification development. The amount of silver halide can be greatly reduced as compared with a normal color developing method in which an oxidized product of a color developing agent is generated by a redox reaction between silver halide and the developing agent. There is no lower limit to the amount of silver halide as long as an image having a sufficient density is formed, but the total amount is preferably 0.01 g / m ² or more in terms of silver.
The total amount of silver halide coated on the support is preferably 0.3 g / m ² or less, particularly preferably 0.2 g / m ² or less, in terms of silver amount.

In the light-sensitive material used in the present invention, dyes having absorption in various wavelength ranges can be used for the purpose of preventing irradiation and halation. For this purpose, any of the known compounds can be used. In particular, dyes having absorption in the visible region include those described in JP-A-3-2.
AI-1 to 11 described on page 308 of 51840 gazette
And the dyes described in JP-A-6-3770 are preferably used.
The compounds represented by the general formulas (I), (II) and (III) described in the lower left column on page 2 of 280750 have preferable spectral characteristics and do not affect the photographic characteristics of a silver halide photographic emulsion. It is also preferable because there is no contamination due to residual color.

In order to improve the sharpness, the amount of these dyes added is 680 nm for an unprocessed sample of a light-sensitive material.
Is preferable to make the spectral reflection density 0.7 or more, more preferably 0.8 or more.

It is preferable to add a fluorescent whitening agent to the light-sensitive material used in the present invention since the whiteness can be improved. The compound preferably used is described in JP-A-2-232652.
And the compound represented by the general formula II described in JP-A No. 6-1980.

When the light-sensitive material used in the present invention is used as a color photographic light-sensitive material, it is combined with a yellow dye-donating substance, a magenta dye-donating substance, and a cyan dye-donating substance to spectrally increase a specific region in a wavelength region of 400 to 900 nm. It has a layer containing a silver halide emulsion which has been felt. The silver halide emulsion contains one kind or a combination of two or more kinds of sensitizing dyes.

As the spectral sensitizing dye used in the silver halide emulsion used in the present invention, any of known compounds can be used, and as the blue-sensitive sensitizing dye, JP-A-3-251840 is used. BS-1 described on the page
To 8 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. As the red-sensitive sensitizing dye, RS-1 to RS-29 described on page 29 of the same publication are used.
8 is preferably used. 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.
Compounds S-1 to S-1 described on pages 15 to 17
7 is 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, dimethylformamide or the like or water, or adding it as a solid dispersion. It may be added.

When a coupler is used as a dye-providing substance in the light-sensitive material used in the present invention, a coupling reaction with an oxidized form of a color developing agent is performed to form a coupling having a spectral absorption maximum wavelength in a wavelength region longer than 340 nm. Any compound capable of forming a compound can be used. Particularly typical examples are a yellow dye-forming coupler having a spectral absorption maximum wavelength in a wavelength range of 350 to 500 nm, and a spectral absorption maximum wavelength in a wavelength range of 500 to 600 nm. And a cyan dye-forming coupler having a spectral absorption maximum wavelength in a wavelength range of 600 to 750 nm.

Cyan couplers that can be preferably used in the light-sensitive material used in the present invention are described in
The general formula (C) described in the lower left column on page 5, page 114154
Couplers represented by -I) and (C-II);
The general formula (I) described in the lower left column of page 4 of JP 35056
a) a cyan coupler represented by (Ib) or (Ic),
JP-A 1-222461, page 6, lower right to page 7, upper left column, general formulas (IIα) to (VIIIα) and page 7, lower right, page 8, upper left column, general formulas (IIβ) to
And a cyan coupler represented by (VIIIβ). In particular, the general formulas (IIα) to (VIIIα) and (IIβ)
Cyan couplers represented by the formulas (VIII) to (VIIIβ) are preferable because they have a sharp absorption of image dyes and have excellent color reproducibility.

The magenta coupler which can be preferably used for the light-sensitive material used in the present invention is disclosed in
Couplers represented by general formulas (MI) and (M-II) described in the upper right column on page 4 of JP-A-114154 can be exemplified. Among the above magenta couplers, more preferred are those represented by the general formula (MI) described in the upper right column on page 4 of the publication.
A coupler represented by the general formula (M
-I) a coupler in which RM is a tertiary alkyl group is particularly preferred because of its excellent light resistance.

As the yellow coupler which can be preferably used for the light-sensitive material used in the present invention, JP-A No.
The coupler represented by the general formula (Y-I) described in the upper right column of page 3 of JP-A-114154 can be exemplified.
Of these, couplers in which RY1 in the general formula [Y-1] is an alkoxy group or couplers represented by the general formula [I] described in JP-A-6-67388 can reproduce yellow having a preferable color tone and are preferable. The most preferred compounds are described in JP-A-4-81847, page 1 and 11
It is a compound represented by General Formula [Y-1] described on pages 17-17.

The following are specific examples of couplers that can be preferably used in the light-sensitive material used in the present invention.

[0052]

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[0053]

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When an oil-in-water emulsion dispersion method is used to add a coupler or other organic compound used in the light-sensitive material used in the present invention, a water-insoluble high-boiling organic solvent having a boiling point of 150 ° C. or higher is usually used. Then, if necessary, a low boiling point and / or water-soluble organic solvent is used in combination to dissolve, and emulsified and dispersed in a hydrophilic binder such as an aqueous gelatin solution using a surfactant. The high-boiling organic solvent that can be used for dissolving and dispersing the dye-providing substance 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.

In place of the method using a high-boiling organic solvent or in combination with a high-boiling organic solvent, a water-insoluble and organic solvent-soluble polymer compound may be added, if necessary, to a low-boiling and / or water-soluble organic solvent. In a hydrophilic binder such as an aqueous gelatin solution by using a surfactant and emulsifying and dispersing by various dispersing means.

As a compound preferable as a surfactant used for dispersing a photographic additive or adjusting a surface tension at the time of coating, a hydrophobic group having 8 to 30 carbon atoms and a sulfonic acid group or a salt thereof in one molecule are preferable. Containing. 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, and the time until the addition to the coating solution after the dispersion and the time from the addition to the coating solution to the coating are preferably as short as 10 hours each. Preferably within 3 hours, more preferably within 20 minutes.

The coupler includes light of the formed dye image,
In order to prevent discoloration due to heat, humidity and the like, it is preferable to use a discoloration inhibitor in combination. Particularly preferred compounds include phenyl ether compounds represented by general formulas I and II described on page 3 of JP-A-2-66541;
A phenolic compound represented by the general formula IIIB described in JP-A-174150, an amine-based compound represented by the general formula A described in JP-A-64-90445,
The metal complexes represented by the general formulas XII, XIII, XIV and XV described in JP-A-82741 are particularly preferable for magenta dyes.
Further, compounds represented by the general formula I 'described in JP-A-1-19649 and compounds represented by the general formula II described in JP-A-5-11417 are particularly preferable for yellow and cyan dyes.

For the purpose of shifting the absorption wavelength of the coloring dye, the compound (d-11) described in the lower left column of page 9 of JP-A-4-114154 and the compound (A'-1) described in the lower left column of page 10 of the same publication are disclosed. And the like. In addition, the fluorescent dye releasing compounds described in U.S. Pat. No. 4,774,187 can also be used.

In the light-sensitive material used in the present invention, a compound which reacts with an oxidized developing agent is added to a layer between the light-sensitive layers to prevent color turbidity, or added to a silver halide emulsion layer. It is preferable 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.

It is preferable to add an ultraviolet absorber to the light-sensitive material used in the present invention to prevent static fog and improve the light fastness of the dye image. Preferable examples of the ultraviolet absorber include benzotriazoles. Particularly preferred compounds are compounds represented by the formula III-3 described in JP-A-1-250944 and JP-A-64-6.
No. 6646, compounds represented by the general formula III, JP-A-63-187240, UV-1L to UV
-27L, 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.

It is advantageous to use gelatin as a binder in the light-sensitive material used in the present invention. If necessary, other gelatin, gelatin derivatives, graft polymers of gelatin and other polymers, and proteins other than gelatin may be used. A hydrophilic colloid such as a sugar derivative, a cellulose derivative, or a synthetic hydrophilic polymer such as a homopolymer or a copolymer 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.

As the support used for the light-sensitive material used in the present invention, any material may be used, such as paper coated with polyethylene or polyethylene terephthalate, a paper support made of natural pulp or synthetic pulp, or a vinyl chloride sheet. And a polypropylene, polyethylene terephthalate support, baryta paper, etc., which may contain a white pigment. Among them, a support having a water-resistant resin coating layer on both sides of the base paper is preferable. As the water-resistant resin, polyethylene, polyethylene terephthalate or a copolymer thereof is preferable.

As the white pigment used for the support, inorganic and / or organic white pigments can be used, and preferably, inorganic white pigments are used.

The center surface average roughness (SRa) value of the support is preferably 0.15 μm or less, more preferably 0.12 μm or less, because the effect of good gloss can be obtained, and it is more preferable. In addition, trace amounts of ultramarine, oil-soluble dyes, etc. to adjust the spectral reflection density balance of the white background after treatment in the white pigment-containing water-resistant resin of the reflective support or in the applied hydrophilic colloid layer to improve whiteness It is preferable to add a bluing agent or a reddish agent.

The photosensitive material used in the present invention may be subjected to corona discharge, ultraviolet irradiation, flame treatment, etc. on the support surface, if necessary, and then directly or undercoating (adhesion of the support surface,
(1 or 2 or more subbing layers for improving antistatic properties, dimensional stability, friction resistance, hardness, antihalation properties, friction properties and / or other properties) Good.

In coating the light-sensitive material used in the present invention, a thickener may be used in order to improve the coating property.
Extrusion coating and curtain coating, in which two or more layers can be applied simultaneously, are particularly useful as a coating method.

In order to form a photographic image using the photosensitive material used in the present invention, an image recorded on a negative may be optically formed on a photosensitive material to be printed and printed. After the image is once converted into digital information, the image may be formed on a CRT (cathode ray tube), and this image may be formed on a photosensitive material to be printed and printed. The printing may be performed by scanning while changing the intensity of the laser beam.

In particular, when the exposure time per pixel is 10 ^-3 seconds or less (so-called high-illuminance short-time exposure), the effects of the present invention are remarkable and the present invention can be used effectively. is there. In the case of flash exposure, the term “exposure time” here means that, when the light intensity changes over time, the light intensity reaches 1/2 of its maximum value and then attenuates to 1/2 of that maximum value. In the case of scanning exposure by laser light, the time when the light intensity becomes 1/2 of the maximum value in the spatial change of the light intensity is defined as the outer edge of the light beam, and the scanning line When the distance between two points where the line passing through the point where the light intensity is maximum and the outer edge of the light beam intersects is the diameter of the light beam, the exposure time is defined as the value obtained by dividing the diameter of the light beam by the scanning speed. I do. Scanning exposure using an array of light sources may be considered in the same manner as the above-described scanning exposure using laser light.

Examples of the exposure apparatus applicable to the image forming method of the present invention include, for example, JP-A-55-4071 and JP-A-55-4071.
JP-A-9-11062, JP-B-56-14963, JP-B-56-40822, and European Patent 77,410.
No., IEICE Technical Report Vol. 24
4 and Movie Television Technology 1984/6 (382), 34-
And those described on page 36 and the like.

The image forming method of the present invention is particularly preferably applied to a photosensitive material for forming an image for direct viewing. For example, color paper, color reversal paper, a photosensitive material for directly 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.

The photosensitive material used in the present invention exhibits the effects of the present invention when subjected to amplification and development processing. Hereinafter, the amplification development processing will be described.

In the present invention, the term “amplification development” refers to a process in which a latent image generated by exposure of a photosensitive material is developed with a color or black-and-white developer to form developed silver, and a chemical reaction using the developed silver as a catalyst is utilized. Is defined as a method of forming or releasing image dyes by, for example, a method of forming image dyes by a coupling reaction of a coupler with an oxidized developing agent formed by a redox reaction of a developing agent and an oxidizing agent using a developed silver catalyst as a catalyst, and the like Is raised.

Examples of the oxidizing agent include compounds giving hydrogen peroxide, such as hydrogen peroxide, salts of hydrogen peroxide, and adducts of hydrogen peroxide, peroxo compounds such as peroxoborates and peroxocarbonates, and cobalt hexaammine complexes. Cobalt (III) complexes, halogenous acids such as chlorite, etc.
And periodic acid. Among them, a method using a compound that gives hydrogen peroxide such as hydrogen peroxide, a salt of hydrogen peroxide, and an addition compound of hydrogen peroxide as an oxidizing agent is advantageous because the amplification effect is high and the load on the environment is reduced. It is.

In the amplification development processing used in the present invention, a combination of an aromatic primary amine developing agent and hydrogen peroxide is preferably used, and N, N-diethyl-p-phenylenediamine is used as the aromatic primary amine developing agent. , 2
-Amino-5-diethylaminotoluene, 2-amino-
5- (N-ethyl-N-laurylamino) toluene, 4
-(N-ethyl-N- (β-hydroxyethyl) amino) aniline, 2-methyl-4- (N-ethyl-N-
(Β-hydroxyethyl) amino) aniline, 4-amino-3-methyl-N-ethyl-N- (β- (methanesulfonamido) ethyl) -aniline, N- (2-amino-
5-diethylaminophenylethyl) methanesulfonamide, N, N-dimethyl-p-phenylenediamine, 4
-Amino-3-methyl-N-ethyl-N-methoxyethylaniline, 4-amino-3-methyl-N-ethyl-N
-(Β-ethoxyethyl) aniline, 4-amino-3-
Methyl-N-ethyl-N- (γ-hydroxypropyl)
Aniline and the like.

Further, in addition to the aromatic primary amine developing agents, for example, EP 565,165, EP 572,05
Nos. 4, 593, 110, and JP-A-8-202002.
And sulfonyl hydrazide and carbonyl hydrazide developing agents described in JP-A Nos. 8-227131 and 8-234390 can also be preferably used.

In the present invention, it is possible to supply the processing solution containing the color developing agent and the oxidizing agent for amplification development to the photosensitive material as a co-existing processing solution. A liquid containing the agent is divided into a plurality and prepared,
It is also possible to supply to a photosensitive material.

The amplification development method used in the present invention is described in, for example, JP-A Nos. 52-13335 and 55-127.
No. 555, No. 61-77851, etc., a developing agent and an oxidizing agent are present in the same processing bath (development / amplification solution) to form a developed silver serving as a catalyst and subsequent amplification development processing. In the same bath, JP-A-5-21619.
No. 2, 5-346647, etc., a developing bath containing a developing agent and an amplification bath containing an oxidizing agent are separated to form developed silver in the developing bath, and the developing agent is brought into the amplification bath and amplified. Developing method or JP-A-61-882
No. 59, as described in JP-A-7-77788, etc., after processing in a developing bath containing a developing agent to form developed silver,
Examples include a method of performing amplification development processing in a processing bath containing a developing agent and an oxidizing agent. As a processing method without using a processing bath, for example, a method of spraying a developing solution, an amplifying solution, or an amplifying developing solution in a mist onto a silver halide photosensitive material as described in JP-A-61-80150, etc. Can be used.

When the developing bath and the amplification bath are separated, the preferred amount of the developing agent in the developer is 0.2 to 20 g / l, particularly preferably 1 to 10 g / l. The amount of hydrogen peroxide (30% solution) in the amplification solution is 0.1 to 100 ml / l.

When the processing is carried out in a single bath including the developing bath and the amplification bath, the preferred amount of the developing agent in the developing / amplifying solution is 0.5 to
15 g / l, more preferably 1 to 10 g / l,
The preferred amount of hydrogen peroxide (30% solution) is 0.1-30
ml / l, more preferably 1 to 5 ml / l.

In the present invention, the above-mentioned developer, amplifying solution,
Although the developing / amplifying solution can be used in an arbitrary pH range, it is preferably pH 8.0 to 12.5, more preferably pH 8.8 to 1 from the viewpoint of rapid processing and stability of the processing solution.
It is used in the range of 2.0.

In the present invention, the pH at the time of amplification development refers to the pH of the development / amplification solution when processing is performed using a development / amplification solution in which a developing agent and an oxidizing agent for amplification development coexist.
When the processing is performed by separating the developing bath and the amplification bath, the pH refers to the pH of the amplification solution in the amplification bath. When the developing solution and the amplifying solution are supplied to the photosensitive material independently of each other, the pH of the solution in which the developing solution and the amplifying solution are preliminarily mixed at a ratio supplied to the photosensitive material is defined as the pH at the time of the amplification development. In the present invention, the pH at the time of amplification development is from pH 8.0 to 12.5 from the viewpoint of rapid processing.
It is more preferable that the pH is 8.8 to 12.0.
Is more preferable.

The processing temperature of amplification development used in the present invention is preferably 20 ° C. or more and 60 ° C. or less. The higher the temperature, the shorter the processing time is possible, which is preferable. However, from the viewpoint of the stability of the processing solution, the lower the temperature, the better.
Preferably, the treatment is performed at a temperature of not more than ° C.

The amplification development time varies depending on the type of the photosensitive material, the processing temperature, the activity of the processing solution, and the like.
The time is preferably within seconds, and more preferably within 40 seconds.

To the developing solution, the amplifying solution, and the developing / amplifying solution, a known developer component compound can be added in addition to the color developing agent and the oxidizing agent. Usually, a development inhibitor such as a pH buffer, a chloride ion, and benzotriazole, a preservative, and a chelating agent are used.

Various compounds such as sodium chloride and potassium chloride can be used as the chloride ion. When processing is performed in a single bath including a developing bath and an amplification bath, the preferred amount of chloride ions in the developing / amplifying solution is 0.1 g / l or more in terms of sodium chloride.

As the pH buffer, known buffers can be used. Above all, buffers composed of a combination of carbonate and / or phosphate are preferable because they can reduce the cost.

In the present invention, it is preferable to add hydroxylamine sulfate to the amplification developer from the viewpoints of improving graininess, color development balance, stability of gradation reproduction, and the like. When processing is performed in a single bath including a developing bath and an amplification bath, the preferred amount of hydroxylamine sulfate in the developing / amplifying solution is 0.1 to
3 g / l.

In the present invention, the use of the above-described color developing agent and black-and-white developing agent in combination in the amplification developing solution can further improve the tone reproduction stability and shorten the amplification processing time in addition to the effects of the present invention. Is possible and preferred.

In the present invention, black-and-white developing agents which can be used include dihydroxybenzenes, 3-pyrazolidones, pyrogallols, glycines, hydroxylamines, hydrazines, aminophenols, reductones, and 3-aminopyranes. Zolins and transition metal complex salts (complex salts of transition metals such as Ti, Cr, Mn, Fe, Co, Ni, Cu, etc.) These may be in any form having a reducing power to be used as a developing solution. ³⁺ , V ²⁺ ,
It takes the form of complex salts such as Cr ²⁺ and Fe ²⁺ , and the ligands are aminopolycarboxylic acids such as ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA) and salts thereof, hexametapolyphosphoric acid, and tetrapolyphosphoric acid. And phosphoric acids such as acids and salts thereof). Among them, preferred are dihydroxybenzenes, 3-pyrazolidones, hydroxylamines, and reductones. The amount of the black-and-white developing agent to be used is preferably in the range of 0.01 to 3.0, more preferably 0.05 to 2.0, in terms of molar ratio to the color developing agent.

In the image forming method of the present invention, after the amplification and development, bleaching and fixing may be performed as necessary. The bleaching process may be performed simultaneously with the fixing process.
After the fixing process, a water washing process is usually performed. Also,
As an alternative to the water washing treatment, a stabilization treatment may be performed.

The processing apparatus used in the image forming method of the present invention may be a roller transport type in which the photosensitive material is transported with rollers interposed in a processing bath, or may be transported with the photosensitive material fixed to a belt. An endless belt method may be used, but a processing bath is formed in a slit shape, and a processing method for supplying a processing liquid to the processing bath and transporting the photosensitive material, and a spray method for spraying the processing liquid,
A web method by contact with a carrier impregnated with the processing solution,
A method using a viscous treatment liquid can also be used.

[0093]

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

Example 1 (Preparation of Blue-Sensitive Silver Halide Emulsion (Em-B1)) 4
In 1 liter of a 2% aqueous gelatin solution kept at 0 ° C., the following (solution A1) and (solution B1) were pAg = 7.3, pH =
The solution was added simultaneously while controlling to 3.0, and the following (solution C1) and (solution D1) were simultaneously added while controlling to pAg = 8.0 and pH = 5.5. At this time, the control of pAg is described in
The control of pH was performed using sulfuric acid or an aqueous sodium hydroxide solution.

(Solution A1) 3.42 g of sodium chloride 0.03 g of potassium bromide 200 ml with addition of water (Solution B1) 10 g of silver nitrate 200 ml with addition of water 200 ml (Solution C1) 102.7 g of sodium chloride Potassium hexachloroiridium (IV) 4 × 10 ⁻⁸ mol potassium hexacyanoferrate (II) 2 × 10 ⁻⁸ mol potassium bromide 1.0 g water 600 ml (solution D1) silver nitrate 300 g water 600 ml after adding water After desalting was performed using a 5% aqueous solution of N and a 20% aqueous solution of magnesium sulfate, the mixture was mixed with an aqueous gelatin solution to give an average particle size of 0.71 μm.
m, coefficient of variation of particle size distribution 0.07, silver chloride content 99.
A 5 mol% monodispersed cubic emulsion EMP-1A was obtained. Next, in the preparation of EMP-1A, the average particle size was 0.64 μm and the particle size was the same except that the addition time of (A1 solution) and (B1 solution) and the addition time of (C1 solution) and (D1 solution) were changed A monodisperse cubic emulsion EMP-1B having a distribution variation coefficient of 0.07 and a silver chloride content of 99.5 mol% was obtained.

The above-mentioned EMP-1A was optimally subjected to chemical sensitization at 60 ° C. using the following compounds. EMP-1
Similarly, after optimally chemical sensitizing B, the sensitized EMP-1A and EMP-1B were mixed at a silver amount of 1: 1 to obtain a blue-sensitive silver halide emulsion (Em-B1). I got

Sodium thiosulfate 0.8 mg / mol AgX chloroauric acid 0.5 mg / mol AgX stabilizer STAB-1 3 × 10 ⁻⁴ mol / mol AgX stabilizer STAB-2 3 × 10 ⁻⁴ mol / mol AgX stability 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 STAB-1: 1- ( 3-acetamidophenyl) -5-mercaptotetrazole STAB-2: 1-phenyl-5-mercaptotetrazole STAB-3: 1- (4-ethoxyphenyl) -5-mercaptotetrazole (green-sensitive silver halide emulsion (Em Preparation of -G1) In the preparation of silver halide emulsion EMP-1A, (A1 solution)
The average particle size was 0.40 in the same manner except that the addition time of (B1 solution) and (C1 solution) and (D1 solution) were changed.
μm, monodisperse cubic emulsion EMP-11A having a silver chloride content of 99.5 mol%, and monodisperse cubic emulsion EMP-11B having an average particle size of 0.45 μm and a silver chloride content of 99.5 mol%.
I got

The above-mentioned EMP-11A was optimally subjected to chemical sensitization at 55 ° C. using the following compounds. Also EMP-
Similarly, after optimally sensitizing EMP-11B, the sensitized EMP-11A and EMP-11B were mixed at a silver ratio of 1: 1 to obtain a green-sensitive silver halide emulsion (Em-G
1) was obtained.

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 stability 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 (Em-R1)) Silver halide emulsion EMP-1A In the preparation of (A1 solution)
The average particle size was 0.43 in the same manner except that the addition time of (B1 solution) and (C1 solution) and (D1 solution) were changed.
μm, a monodisperse cubic emulsion EMP-21A having a silver chloride content of 99.5 mol%, and a monodisperse cubic emulsion EMP-21B having an average particle size of 0.40 μm and a silver chloride content of 99.5 mol%.
I got

The above-mentioned EMP-21A was optimally subjected to chemical sensitization at 60 ° C. using the following compounds. Also EMP-
Similarly, after optimally chemical sensitizing 21B, the sensitized EMP-21A and EMP-21B were mixed at a silver amount of 1: 1 to obtain a red-sensitive silver halide emulsion (Em-R
1) was obtained.

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 stability 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 SS-1 2 × 10 ^{− 3} mol / mol AgX

[0102]

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[0103]

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(Preparation of silver halide photographic light-sensitive material (101)) A paper support was prepared by laminating high-density polyethylene on both sides of a paper pulp having a basis weight of 180 g / m ² . However, on the side on which the emulsion layer was applied, a molten polyethylene containing anatase-type titanium oxide having a surface treatment dispersed therein at a content of 15% by weight was laminated. After subjecting this reflective support to a corona discharge treatment, a gelatin undercoat layer was provided thereon, and each layer having the following constitution was further provided thereon to prepare a silver halide photographic material (101). In making photosensitive materials,
Each coating solution was prepared so as to have the following coating amount, and (H-1) and (H-2) were added as hardening agents. As a dispersing aid for the coupler, a surfactant (SU-1) was used.
Surfactants (SU-2), (SU-
3) was added to adjust the surface tension. In addition, (F-
1) was added so that the total amount was 0.04 g / m ² .
The coating amount of each layer is shown below.

Layer composition Addition amount (g / m ² ) 7th layer (protective layer) Gelatin 1.00 DIDP 0.002 DBP 0.002 Silicon dioxide 0.003 6th layer (UV absorbing layer) Gelatin 0.40 AI-1 0.01 UV absorber (UV-1) 0.12 UV absorber (UV-2) 0.04 UV absorber (UV-3) 0.16 Stain inhibitor (HQ-5) 0.04 PVP 0.03 Fifth layer (red-sensitive layer) Gelatin 1.30 Red-sensitive emulsion (Em-R1) 0.029 Cyan coupler (C-1) 0.33 Dye image stabilizer (ST-1) 0 .10 Anti-stain agent (HQ-1) 0.004 DBP 0.10 DOP 0.20 Fourth layer (ultraviolet absorbing layer) Gelatin 0.94 Ultraviolet absorbing agent (UV-1) 0.28 Ultraviolet absorbing agent (UV- 2) 0.09 UV absorption Collector (UV-3) 0.38 AI-1 0.02 Stain inhibitor (HQ-5) 0.10 Third layer (green-sensitive layer) Gelatin 1.30 AI-2 0.01 Green-sensitive emulsion (Em-G1) 0.020 Magenta coupler (M-1) 0.20 Dye image stabilizer (ST-3) 0.20 Dye image stabilizer (ST-4) 0.17 DIDP 0.13 DBP 0 .13 second layer (middle layer) gelatin 1.20 AI-3 0.01 anti-stain agent (HQ-2) 0.03 anti-stain agent (HQ-3) 0.03 anti-stain agent (HQ-4) 0 0.05 Stain inhibitor (HQ-5) 0.23 DIDP 0.04 DBP 0.02 Fluorescent brightener (W-1) 0.10 First layer (blue-sensitive layer) Gelatin 1.20 Blue-sensitive emulsion (Em-B1) 0.059 Yellow coupler (Y- ) 0.70 Dye image stabilizer (ST-1) 0.10 Dye image stabilizer (ST-2) 0.10 Dye image stabilizer (ST-5) 0.10 Stain inhibitor (HQ-1) ) 0.01 Image stabilizer A 0.15 DBP 0.10 DNP 0.05 Support Polyethylene laminated paper The amount of silver halide is shown in terms of silver.

SU-1: sodium tri-i-propylnaphthalenesulfonate SU-2: di (2-ethylhexyl) sodium sulfosuccinate sodium salt SU-3: di (2,2,3,3,4) sulfosuccinate , 4,
5,5-octafluoropentyl) sodium salt H-1: tetrakis (vinylsulfonylmethyl) methane H-2: 2,4-dichloro-6-hydroxy-s-triazine sodium DBP: dibutyl phthalate DIDP: diisodecyl phthalate DOP : Dioctyl phthalate DNP: dinonyl phthalate PVP: polyvinylpyrrolidone 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) butylhydroquinone Image stabilizer A : Pt-octylpheno Rule

[0107]

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[0108]

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[0109]

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(Evaluation of Photosensitive Material) The photosensitive material (101) thus prepared was exposed to light wedges with green light and red light using a filter, and subjected to an amplification and development process (SRI-1). ), The sample is cut into two, and one of the cut samples is subjected to a processing step (SRI).
-2) was performed. Here, the processing step (SRI
The sample subjected to the processing step (SRI-2) is referred to as (SMP-1).
2). The reflection density of the sample (SMP-1) was measured using a densitometer PDA-65 (manufactured by Konica Corporation). Next, the microdensitometer PDM-5A
R (manufactured by Konica Corporation) with a reflection density of 0.3, 0.
The steps closest to 6 and 1.2 are each set to an aperture size of 10 μm × 50 μm, and scanning measurement is performed at 2500 points at a sampling pitch of 1 μm, and the number of samples is 30
The standard deviation of the concentration was calculated for each of the 0 points, and the average of these was calculated as 10
The value obtained by multiplying by 00 was used as an evaluation scale for granularity. The smaller this value is, the better the graininess is, and the smaller the roughness at the time of appreciating the print image is. Tables 1, 2, and 3 show the results at the concentrations of 0.3, 0.6, and 1.2, respectively.

The sample (SMP-2) was subjected to a peeling treatment from the support, and was subjected to 1.0 × 10 ⁻⁸ m by an optical microscope.
^The number of developed silver particles per ^two areas was measured.

Processing Step (SRI-1) Processing Processing Time Time Amplified Developer (CDA-1) 33.0 ± 0.5 ° C. Stop Solution 33.0 ± 0.5 ° C. 20 seconds Fixing Solution 33 0.0 ± 0.5 ° C 20 seconds Stabilizing solution 30-36 ° C 60 seconds Drying 60-80 ° C 60 seconds Processing step (SRI-2) Processing Processing time Time Bleaching / fixing solution 35.0 ± 0.5 20 ° C. Stabilizing solution 30-36 ° C. 60 seconds Drying 60-80 ° C. 60 seconds The composition of the processing solution is shown below.

Amplification developer (CDA-1) Pure water 800 ml Potassium bromide 0.001 g Sodium chloride 0.35 g 4-Amino-3-methyl-N-ethyl-N- (β- (methanesulfonamido) ethyl)- Aniline sulfate 4.0 g N, N-diethylhydroxylamine 4.7 g Diethylenetriaminepentaacetic acid pentasodium salt 2.0 g 1-hydroxyethylidene-1,1'-diphosphonic acid 0.35 g Hydroxyamine sulfate 1.0 g Fluorescent brightener (4,4'-diaminostilbene disulfonic acid derivative) 2.0 g Potassium carbonate 20 g Hydrogen peroxide solution (30%) 3 ml Water was added to make the total volume 1 liter, and the pH was 11.1 with sulfuric acid or potassium hydroxide. Adjust to 0.

Bleaching / fixing solution Pure water 700 ml Ferric ammonium diethylenetriaminepentaacetate dihydrate 65 g 3 g diethylenetriaminepentaacetic acid 3 g ammonium thiosulfate (70% aqueous solution) 100 ml 2-amino-5-mercapto-1,3,4-thiadiazole 0 g Ammonium sulfite (40% aqueous solution) 27.5 ml Add water to make the total volume 1 liter, and adjust the pH to 5.0 with potassium carbonate or glacial acetic acid.

Fixing solution Pure water 700 ml Ammonium thiosulfate (70% aqueous solution) 100 ml Ammonium sulfite (40% aqueous solution) 27.5 ml Add water to make the total volume 1 liter, and adjust the pH to 5.0 with potassium carbonate or glacial acetic acid. .

Stabilizing solution Pure water 800 ml 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 0.0 g fluorescent whitening agent (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 (polyvinylpyrrolidone) 1.0g Ammonia water (25% aqueous solution of ammonium hydroxide) 2.5g Nitrilotriacetic acid trisodium salt 1.5g Add water to make the total volume 1 liter, and adjust the pH to 7.5 with sulfuric acid or ammonia water. I do.

[0117]

[Table 1]

[0118]

[Table 2]

[0119]

[Table 3]

The number of developed silver particles was represented by the number per area of 1.0 × 10 ⁻⁸ m ² .

From the results shown in Tables 1 to 3, when the development time of the green light-exposed sample is in the range of 10 to 30 seconds, the ratio between the color density and the number of developed silver particles is 2.0 × 10 ^-2 or less. It can be seen that the graininess was also greatly improved.
In addition, for the red light exposure sample, the development time was 10 minutes.
In the range of from 40 seconds to 40 seconds, the ratio between the color density and the number of developed silver particles is 2.0 × 10 ⁻² or less, and the graininess is greatly improved.

Example 2 In the same manner as in Example 1, except that the amount of hydrogen peroxide added to the amplification developer (CDA-1) was changed to the amount shown in Table 4, the color density / the number of developed silver particles, Graininess was evaluated. Table 4 shows the results.

[0123]

[Table 4]

The immersion time in the amplification developer was the minimum time at which the maximum density was obtained and the stain did not increase.

From the results in Table 4, it can be seen that the ratio between the color density and the number of developed silver particles of the present invention is 2.0 × 1 when the addition amount of the 30% hydrogen peroxide solution is 3 cc / l or less for green exposure and red exposure.
0 ^-2 or less, indicating that the graininess is greatly improved.

Example 3 (Preparation of silver halide light-sensitive materials (302) to (304)) In the preparation of the light-sensitive material (101) of Example 1, the cyan coupler (C-1) was replaced with (C-2), (C-
Light-sensitive materials (302), (303) and (304) were prepared in the same manner, except that 3) and (C-4) were used. These photosensitive materials (101) and (302) to (304) were exposed to red light in the same manner as in Example 1 and evaluated. Table 5 shows the results.

[0127]

[Table 5]

From the results shown in Table 5, the couplers (C-1) to (C-
In the case of 3), when the color density / the number of developed silver particles is smaller than 2.0 × 10 ^{−2, the} effect of improving the graininess is particularly large, which is a preferable embodiment of the present invention.

[0129]

According to the present invention, in the amplification development processing,
It is possible to provide an image forming method with improved roughness when viewing a print image.

Claims (3)

[Claims] Amplifying a silver halide photographic material having at least one yellow image forming silver halide emulsion layer, a magenta image forming silver halide emulsion layer and a cyan image forming silver halide emulsion layer on a support. In the image forming method for developing, the color density of the coupler in at least one of the color image forming layers is from 0.2 to 1.5.
^{Wherein the} ratio of the color density to the number of developed silver particles for 1.0 × 10 ⁻⁸ m ² is 2.0 × 10 ⁻² or less. 2. The image forming layer comprises at least one coupler having a molar extinction coefficient ε of 20,000 or more of a coloring dye.
The image forming method according to claim 1, wherein the image forming method has a seed. 3. The silver halide photographic light-sensitive material according to claim 1, wherein the total amount of silver halide coated on the support is 0.01 to 0.3 g / m ² in terms of silver amount. The image forming method according to claim 1.