JPH02193144A - Silver halide color photographic sensitive material - Google Patents

Abstract

PURPOSE:To enhance the sensitivity of a sensitive material as well as to increase the density of a developed color and to improve the sharpness by forming at least one layer contg. a specified coupler. CONSTITUTION:At least one layer contg. a coupler represented by formula I is formed. In the formula I, R1 is a group substitutable on a benzene ring, X is sulfonyl, acyl, oxycarbonyl or carbamoyl and Z is sulfonylamino, carbamoyl, acylamino, oxycarbonylamino, ureido, sulfonyloxy or acyloxy. Since the low-cost yellow coupler having satisfactory dispersion stability to a silver halide emulsion and high reactivity is contained, a silver halide color photographic sensitive material giving sufficiently high density of a developed color owing to satisfactory color developability and having high sensitivity or ensuring high image quality is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a silver halide color photographic light-sensitive material using an active point substitution type yellow dye-forming coupler having excellent color development properties.

[Background of the invention]

In color photography, as is well known, when a silver halide color photographic light-sensitive material is color developed, an oxidized aromatic primary amine color developing agent and a coupler couple to form indophenol, indoaniline, azomethine, etc. pigment is produced and a color image is formed.

In view of the high sensitivity and high image quality that have been strongly sought after in recent years,
Further, from the viewpoint of shortening the development processing time, a highly reactive coupler has been desired.

That is, by increasing the reactivity of the coupler to the oxidized developing agent, it is possible to improve the sensitivity of the photosensitive material. Furthermore, by increasing the reactivity of the coupler, the amount of the coupler and silver halide used can be reduced unless particularly high sensitivity is desired. As a result, the film thickness of the photosensitive material decreases and light scattering of incident light decreases.
This results in improved sharpness. Normally, in color negative and color reversal sensitive materials, the blue-sensitive layer is closest to the light incident side, so reducing the thickness of the blue-sensitive layer has the greatest effect. Development was desperately needed.

A two-equivalent type yellow coupler having an aryloxy group as a leaving group at the active site of the coupler has attracted attention because of its high reactivity.

For example, U.S. Pat. Aryloxy elimination type 2 having as a diffusion-resistant group
Equivalent yellow couplers are also disclosed in JP-A-60-696.
Publication No. 53 discloses an aryloxy elimination type 2-equivalent Yellow Kagura having an alkyl or arylsulfamoyl group as a diffusion-resistant group.

These couplers exhibit significant color development, especially when so-called electron-withdrawing groups such as sulfonyl, sulfamoyl, carbamoyl, acyl, formyl, nitro, and cyano groups are introduced at the p-position of the aryloxy leaving group. It has been found that efficiency is improved. However, these couplers have the disadvantage that their solubility in high-boiling organic solvents is not sufficient and their dispersion stability in silver halide emulsions is low. It has become clear that this becomes a major problem, especially when the amount of high boiling point solvent is reduced due to the recent strong trend toward thin films. Furthermore, many of the couplers disclosed in these patents have problems such as insufficient coupling reactivity or low color density requiring an increased coating amount of the coupler. However, further improvements were desired.

As an aryloxy elimination type 2-equivalent yellow coupler with further improved solubility and color development in high-boiling point solvents, diffusion-resistant alkyl and arylsulfonamide groups are introduced in JP-A-62-153954 and JP-A-63-43144. Compounds having this as a functional group are disclosed. but,
These couplers are compounds intended to improve image storage stability, and it is difficult to say that their color development is still sufficient.

Further, JP-A-62-153955 discloses an aryloxy elimination type 2-equivalent yellow coupler having a special arylsulfonamide group as a diffusion-resistant group. However, even these couplers cannot be said to fully satisfy the requirements of solubility in high-boiling solvents and high color development, and furthermore, they have the disadvantage that the production cost increases due to the complicated diffusion-resistant groups.

U.S. Patent No. 4,401,752, JP 59-2286
No. 49, No. 62-204259 and No. 62-2504
Publication No. 46 describes that the coloring properties can be further improved by introducing a substituent connected to the 0-position of the aryloxy leaving group, especially a substituent connected through a hetero atom. especially,
JP-A-62-204259 and JP-A No. 62-250446
The publication contains a carbamoyl group as a diffusion-resistant group,
Yellow couplers are disclosed having a substituent linked by a heteroatom in the o-position. However, introducing a substituent at the 0-position of the aryloxy leaving group resulted in a decrease in solubility in high boiling point solvents and dispersion stability in emulsions.

Also, in European Patent No. 296,793,
A benzoylanilide type yellow coupler having a 4-(p-hydroxyphenylsulfonyl)phenoxy group as an eliminator is described.

As described above, although the color tone and thermal stability of the produced images were certainly excellent, the solubility in high boiling point solvents and dispersion stability were still insufficient.

As mentioned above, the yellow couplers known so far have partially solved the conventional problems, but have not solved all of them.

[Object of the Invention] Therefore, in view of the above-mentioned conventional problems, the present invention improves color development by incorporating a yellow coupler that is inexpensive, has sufficient dispersion stability in silver halide emulsions, and has high reactivity. is good and sufficient maximum color density is obtained,
Moreover, it is an object of the present invention to provide a silver halide color photographic light-sensitive material with high sensitivity or high image quality.

[Structure of the invention]

The above objects of the present invention have been achieved by a silver halide color photographic material having at least one layer containing a coupler represented by the following general formula [I].

General Formula (I) In the formula, R1 represents a group that can be substituted on the benzene ring. X represents a sulfonyl group, an acyl group, an oxycarbonyl group, or a carbamoyl group. Z represents a sulfonylamino group, a carbamoyl group, an acylamino group, an oxycarbonylamino group, a ureido group, a sulfonyloxy group, and an acyloxy group. ] Next, general formula [I] will be explained in detail.

Examples of the group that can be substituted on the benzene ring represented by R1 in the general formula [I] include a halogen atom, an alkoxy group, a trifluoromethyl group, an aryloxy group, an alkylcarbonyloxy group, an arylcarbonyloxy group, and an alkyl group. Examples thereof include an amino group, a dialkylamino group, an anilino group, an alkylcarbonylamino group, and an arylcarbonylamino group, preferably a halogen atom or an alkoxy group, and particularly a chlorine atom or a methoxy group.

The group represented by Z in the general formula [I] includes a sulfonylamino group, a carbamoyl group, an acylamino group,
Examples thereof include an oxycarbonylamino group, a ureido group, a sulfonyloxy group, and an acyloxy group, with preference given to general formulas (II), (I[[), and (IV)].

(V ), (Vl ), [:■], [■] and (II
) General formula (1) of the group represented by %Formula% General formula CDI] -CONR1R.

COOR3 □ R4 General formula [■] =O3O2R3 General formula ([) In the formula, R5 represents an alkyl group, a cycloalkyl group, or an aryl group, and R, , R represent a hydrogen atom and 6 groups represented by R1 .

Examples of the alkyl group and cycloalkyl group represented by R, R4 and R6 include linear or branched alkyl groups having 1 to 30 carbon atoms and cycloalkyl groups (for example, methyl group, n-butyl group, cyclohexyl group, 2-ethylhexyl group, n-dodecyl group, n-hexadecyl group, etc.).

Furthermore, the aryl group represented by R, R4 and R5 is
Examples include aryl groups having 6 to 22 carbon atoms (eg, phenyl group and l-7tyl group).

These alkyl groups and cycloalkyl groups represented by R, R4, and R5 include those having further substituents, such as those that can be substituted with the alkyl group, cycloalkyl group, and alkenyl group represented by R1. Substituents having the same meaning as the groups listed as the groups can be mentioned.

Further, the aryl group represented by R, R, and R5 further includes those having a substituent, and the substituent can be, for example, an alkyl group or an alkyl group, a cycloalkyl group, and an alkenyl group represented by R1. Substituents having the same meaning as the groups listed above can be mentioned.

In the general formula (V), Ll represents a divalent organic linking group represented by an alkylene group or an arylene group, and the alkylene group is, for example, a linear or branched alkylene group having 1 to 10 carbon atoms (for example, methylene group, ethylene group, methylethylene group, propylene group, dimethylmethylene group,
butylene group, hexylene group, etc.).

Further, examples of the arylene group represented by LL include arylene groups having 6 to 14 carbon atoms (for example, 1,2-phenylene group, 1,4-phenylene group, and 1,4-naphthylene group). It will be done.

In the general formula CI), X represents a sulfonyl group, an acyl group, an oxycarbonyl group, or a carbamoyl group, preferably a group represented by the general formulas (X), (XI), [:XI[] and (Xlll). General formula [X] representing a group selected from R5502 General formula (n) R6SO2-R2-CO General formula (XI[] 6NCO General formula (x m) 60CO- In the formula, R6 is an alkyl group, a cycloalkyl group or represents an aryl group, and R7 represents a hydrogen atom or 6 groups represented by R6. Specific examples of the 6 groups represented by R, , R, include those shown as the above-mentioned example of R3.

In addition, the alkyl group, cycloalkyl group, and aryl group represented by R5 and R7 further include those having a substituent. Examples of the substituent include the alkyl group and cycloalkyl group represented by R8 described above. Substituents having the same meaning as the groups listed as substitutable groups can be mentioned.

In the general formula (XI), R2 is a divalent organic linking group (
For example, in the general formula (V), it represents a group synonymous with the alkylene group or arylene group represented by.

The coupler represented by the general formula CI) has a substituent R+,
Any one of R2, R3, R4+Rs, Ra, and Ry may form a dimer, oligomer, or multimer that is bonded to each other via a divalent or higher group. In this case, the range of carbon atoms shown in each of the above-mentioned substituents may be outside the specified range.

Specific representative examples of the yellow coupler represented by general formula CI) are shown below, and the present invention is based on them. Any coupler represented by 2-(I) can be synthesized by a known method.

For example, when Z is bonded to a benzene ring via a nitrogen atom (eg, general formulas (n), (IV) to [■]), it can be synthesized by the following steps.

Intermediate A Intermediate B Coupler represented by general formula [I] Note that R represents a residue of 2 excluding the nitrogen atom directly bonded to the benzene ring.

Furthermore, among the couplers represented by general formula CI), Z is bonded to the benzene ring through an atom other than the nitrogen atom (for example, general formula CI [[), (■), (ff)]), Instead, the corresponding aniline derivative can be reacted with Intermediate A and then synthesized by the same steps =24 Hereinafter, synthesis examples of the above-mentioned couplers will be shown.

Synthesis Example-1 (Synthesis of Exemplary Coupler (1)) Synthesis of Intermediate 2> 1 19.1g, hexadecanesulfonyl chloride 1
7,8g, and 4.4g of pyridine in 25g of acetonitrile.
Dissolve in 0m+2 and heat under reflux for 2 hours. After the reaction was completed, insoluble materials were removed by filtration while hot, and the solvent was removed under reduced pressure.
The desired intermediate 2 was obtained by recrystallization from 0 mQ acetonitrile. Yield: 22.7 g (68% yield).

Synthesis of Intermediate 3> 2 16.7g was dissolved in 300ml of chloroform and cooled in a water bath until the internal temperature became 5°C or less. 3.7 g of sulfuryl chloride was slowly added dropwise to this. After dripping,
Remove the water bath and stir at room temperature for 3 hours. After completion of the reaction, the reaction mixture was diluted with 5% aqueous sodium hydrogen carbonate solution 200+n+2
Washed three times with water and once with 200 ml of saturated saline, and dried over magnesium sulfate. After removing the solvent under reduced pressure, the dried product was recrystallized from 5 times the amount of ethanol to obtain the desired intermediate 3.
I got it. Yield: 14.9 g (yield: 85%).

<Synthesis of exemplary coupler (1)> 3 5,6gs and bis(4-hydroxyphenyl)
2.4 g of sulfone are dissolved in 100++12 acetonitrile and heated at 60°C. A solution of 0.9 g of triethylamine dissolved in 20 ml of acetonitrile was slowly added dropwise over about 1 hour. After dropping, the mixture is heated as it is at 60°C for 3 hours. After the reaction was completed, the solvent was removed under reduced pressure, and the residue was dissolved in 100 m4 of ethyl acetate.
Washed twice with 100ml of % sodium bicarbonate aqueous solution and once with 100ml of saturated saline, dried over magnesium sulfate, and removed the solvent under reduced pressure. The desired exemplary coupler (1) was obtained by recrystallization from ethanol. Yield: 2.8 g (yield: 38%) The structure of the exemplary coupler (1) was confirmed by mass spectra, NMR spectra, and IR spectra.

Other exemplary couplers of the invention also start from corresponding raw materials,
Synthesized according to the synthesis example.

The above yellow couplers of the present invention can be used alone or in combination of two or more. Further, it may be used in combination with any known pivaloylacetanilide-based or benzodiphyllacetanilide-based yellow coupler.

In order to incorporate the yellow coupler of the present invention into a silver halide photographic emulsion of a color photographic light-sensitive material, for example, tricresyl phosphate, dibutyl phthalate, etc. having a boiling point of 17
After dissolving in a high boiling point organic solvent of 5°C or higher or a low boiling point organic solvent such as ethyl acetate or butyl propylate alone or in combination, the mixture is mixed with an aqueous gelatin solution containing a surfactant, and then high speed After emulsifying and dispersing with a rotary mixer or colloid mill, it is added directly to a silver halide photographic emulsion, coated on a support and dried, or after the emulsified dispersion is set, it is shredded and washed with water, etc. After removing the low boiling point organic solvent, it may be added to the emulsion, coated on a support and dried. Generally, it is preferable to add 10 to 300 g of the yellow coupler of the present invention per mole of silver halide, but this may be varied depending on the purpose of application.

The silver halide photographic light-sensitive material of the present invention may be of any kind regardless of its type or use. Examples of the silver halide used at this time include silver chloride, silver bromide, silver iodide, silver chlorobromide, silver iodobromide, and silver chloroiodobromide.

The silver halide photographic material according to the present invention may contain other color couplers together with the yellow coupler of the present invention in order to form a multicolor image.

The silver halide photographic material of the present invention includes a color antifoggant, an image stabilizer, a hardening agent, a plasticizer, a polymer latex, a formalin scavenger, a mordant, a development accelerator, a development retardant, and a fluorescent brightener. , matting agents, solvents, antistatic agents,
Surfactants and the like can be optionally used.

The durability of the yellow image can be further improved by containing an ultraviolet absorber in the silver halide photographic material containing the yellow coupler of the present invention.

〔Example〕

Next, the present invention will be described in more detail with reference to Examples, but the embodiments of the present invention are not limited thereto.

Example 1 As shown in Table 1, IO, Og of each of the yellow coupler of the present invention (indicated by the number of the above-mentioned exemplary coupler) and the following comparative coupler were mixed with 2.0 m12 of dibutyl phthalate and 20
It was added to a mixture of mQ ethyl acetate and heated to 50°C to dissolve. A) 5 m of a 10% aqueous solution of Lecanol B (alkylnaphthalene sulfonate: manufactured by DuPont)
12 and 100ynQ of a 5% gelatin aqueous solution, and the mixture was passed through a colloid mill several times to emulsify. After emulsification, 20°C
The samples were stored for 48 hours and then observed with the naked eye using a 20x magnifying glass. The results are shown in Table 1.

The following couplers were used for comparison.

Comparative coupler H (coupler described in European Patent No. 296.793)
Table ■ H (Coupler described in JP-A No. 60-69653) (Coupler described in JP-A-62-250446) As is clear from Coat 1 above, none of the yellow couplers of the present invention precipitated, compared to the comparison. It was found that the dispersion stability of the emulsion over time is superior to that of conventional couplers.

Example 2 A monochromatic color photographic material was prepared by sequentially providing each layer having the composition shown below on a cellulose triacetate film support.

1st layer; antihalation layer Gelatin layer containing black colloidal silver.

2nd layer; middle layer gelatin layer.

3rd layer: Blue-sensitive emulsion layer Silver iodobromide emulsion Coated silver amount: 1.2 g/m" Yellow coupler (listed in Table 2): 0.15 mol per mol of silver 4th layer: Protection Layer Gelatin Layer However, the third layer, the silver halide emulsion layer, was coated by the following method.

As shown in Table 2, 3 X to-'' moles of each of the yellow coupler of the present invention (indicated by the number of the exemplary coupler above) and the comparative coupler were combined with 0.25 parts by weight of tricresyl 7 phosphate per part by weight of coupler. and 3 parts by weight of ethyl acetate to dissolve.

To this solution, 30 mQ of a 10% aqueous solution of Alkanol B (alkylnaphthalene sulfonate, manufactured by DuPont) and 200 m+2 of a 5% aqueous solution of gelatin were mixed, and the mixture was passed through a colloid mill several times to emulsify to create a dispersion.

Silver iodobromide emulsion (silver iodide 7 mol%
The above dispersion was added to 208 m+2 (containing 84 g of silver iodobromide), and then 400 m of a 3.7% gelatin aqueous solution was added.
12 and saponin as a coating aid and lmg of cyanuric chloride/g of gelatin as a hardening agent, and coated so that the amount of coated silver (converted to metallic silver) was 1.2 g/m''.
It was dried and used as a sample.

The fourth protective layer also contains cyanuric chloride and gelatin Ig.
10 mg was added per portion.

The fourth layer was applied, dried and left at 80% relative humidity for 14 hours.

The sample was then exposed through a wedge to a white light source with a color temperature of 4800'K, and color developed according to the color processing steps described below.

Geography process (38℃) Color development phenomenon 3 minutes 15 seconds bleaching 1 minute 30 seconds washing with water
Fixing for 3 minutes and 15 seconds Washing with water for 6 minutes and 30 seconds Stabilizing for 3 minutes and 15 seconds Drying for 1 minute and 30 seconds The composition of the geoliquid used in each processing step is as follows.

[Coloring phenomenon liquid]

4-Amino-3-methyl-N-ethyl-N-(β-hydroxyethyl) Aniline sulfate 4.75g Anhydrous sodium sulfite 4.25g Hydroxylamine 1/2 sulfate 2.0g Anhydrous potassium carbonate 37.5 g Sodium bromide 1.3 g Nitrilotriacetic acid
Trisodium salt (l hydrate) 2.5 g Potassium hydroxide 1.0 g Add water to make 112, and adjust to pH 10.3 using potassium hydroxide.

[Bleach solution]

Ethylenediaminetetraacetic acid iron ammonium salt 100.0 g Ethylenediaminetetraacetic acid diammonium salt 10.0 g Ammonium bromide 150.0 g Glacial acetic acid 10.0 mff Add water to make ta, and adjust to pH 6.0 using aqueous ammonia. .

[Fixer]

Ammonium thiosulfate 175.0 g Anhydrous sodium sulfite 8.5 g Sodium metasulfite 2.3 g Add water and prepare 1a
and adjusted to p)(6,0 using acetic acid.

[Stabilizing liquid]

Formalin (37% aqueous solution) Conidax (manufactured by Konica Corporation) Add water to obtain IQ.

Comparative coupler 1, 5m4 7.5m (1) The density of the above sample was measured through a blue filter, and the relative values of maximum density and sensitivity (reciprocal of the exposure amount that produces a density of fog + 0.1) are listed in Table 2.

Table 2 (Coupler described in JP-A-51-10263602636, coupler described in National Patent No. 3,933,501)・1
Relative value when the sensitivity of sample 26 is set to 100.

As is clear from Table 2, those using the coupler of the present invention not only have a high color density but also have an increased relative sensitivity.

Example 3 In the following examples, the amounts of sensitizing dyes and couplers added are per mole of silver halide unless otherwise specified.

On a subbed triacetylcellulose film support, each layer having the composition shown below was sequentially coated from the support side to prepare a multilayer color photosensitive material sample.

1st layer: antihalation layer UV absorber - 10.3g/rn2. UV absorber-2
0,497m2. Black colloidal silver 0.249/m2.
Gelatin 2.7g/m2 2nd layer: Intermediate layer 2.5-di-t-octylhydroquinone 0.1g/
rn”.

Gelatin 1. Og/m2 Third layer: Low sensitivity red-sensitive silver halide emulsion layer average grain size (r
) 0.35 μrn AgBr containing 12.5 mol% Ag
Monodisperse emulsion consisting of 1 (emulsion ■)...silver amount 0.5g
/m2 Sensitizing dye-1...7.6X 10-' mol Coupler C-1・0.1 mol, gelatin 0.9 g/m2 4th layer: High sensitivity red-sensitive silver halide emulsion layer average grain size (r )
0.75 μm AgBr 1 containing 12.5 mol% Ag
Monodisperse emulsion (emulsion ■) consisting of... silver amount 0.8 g/m
2 Sensitizing dye-1...3.2X 10 Ichiban coupler C=
1...0.2 mol, gelatin 1.75 g/5th layer: middle layer 2.5-di-t-octylhydroquinone 0.1 g/
+++2゜gelatin 0.99/m" 6th layer - low sensitivity green sensitive silver halide emulsion layer Emulsion I...
Silver amount 1. Og/is sensitizing dye-2...6.6X 10-'mol sensitizing dye-
3...0.6X 10-'molcabrado 1-0.0
5 mol, gelatin 008 g 7 m'' 7th layer: High sensitivity green sensitive silver halide emulsion layer Emulsion ■...Amount of silver 1-0 g/rn
” Sensitizing dye-2...2.76X 10-' molar Sensitizing dye-3...0.23X 10-' molar caprate
・0.15 mol, gelatin 1.5 g/m" 8th layer: Intermediate layer Same as 5th layer 9th layer: Yellow filter layer Yellow colloidal silver 0.19/m", gelatin 0.99
/m”2.5-di-t-octylhydroquinone 01
g/m2 1st θ layer: low sensitivity blue-sensitive silver halide emulsion layer average grain size Cr) 0. ．． 6pm Monodispersed emulsion (emulsion ■) consisting of AgBr1 containing 12.5 mol% of Ag...Silver amount 0-4g7m2 coupler (listed in Table 3)...0
．． 3 moles.

Gelatin 1.3 g/m" 11th layer: Highly sensitive blue-sensitive silver halide emulsion layer average grain size (
r) 1.0. c+ m Ag+A containing 2.5 mol%
Monodispersed emulsion (emulsion ■) consisting of gBr1...Amount of silver 0
．． 89/Il+” coupler (listed in Table 3)...0.
3 moles.

Gelatin 2.197m2 12th layer: 1st protective layer UV absorber-1019/111", UV absorber-2
0,49/Il! ”, gelatin 1.2g/Il+2
2.5-di-t-octylhydroquinone 0.1g/
rn" 13th layer: second protective layer average grain size (r) 0.06 μm non-photosensitive fine grain silver halide emulsion consisting of AgBr 1 containing 1 mol% Agl...silver amount 0-3 g/m", polyester Methyl methacrylate particles (diameter 1.5 μm), gelatin 0.7 g/m”
and Surfactant-1 In addition to the above composition, a gelatin hardening agent and a surfactant were added to each layer. Additionally, tricresyl phosphate was used as a coupler solvent.

Ultraviolet absorber-1 Ultraviolet absorber-2 Sensitizing dye-1 Sensitizing dye-2 (CHz)ssOs' (shih2)3bL13Na Sensitizing dye-3 Coupler C-1 H (Coupler described in JP-A-63-43144) ) coupler M
-1 C,H.

(Coupler described in JP-A-51-102636) Gelatin hardening agent-1 Na Surfactant-1 NaOsS-CHCOOCH2(CF2CF2)sHC
HzCOOCH2(CF2CF2)J After the samples 28 to 35 thus prepared were left for 16 hours at a relative humidity of 80% and a temperature of 40°C, one set was subjected to wedge exposure using white light, and the other set was exposed to wedge light using white light. Provide exposure through a pattern for modulation transfer function (MTF) measurement.

Next, the following development treatment was performed.

Processing process Processing time Processing temperature First development
6 minutes 38°C (±0.3°C) Washing with water 21111 Reversing 21111 Color development 5 tt tt tone
Preparation 211 〃Bleaching 6〃
〃Fixed Arrival 4〃
〃Wash 4 tt
tt stable 1
tt Normal Wet Dry The composition of the treatment liquid used in the above treatment step is as follows.

First developer Sodium tetrapolyphosphate 2g Sodium sulfite 20g Hydroquinone monosulfonate' 30g Sodium carbonate (l hydrate) 30
g 1-phenyl-4-methyl-4-hydroxymethyl-3
-Pyrazolidone 2g Potassium bromide 2.5g Potassium thiocyanate 1.2g Potassium iodide (0,1
% solution) Add 2ml12 water
10100O reversal solution Nitrilotrimethylenephosphonic acid, hexasodium salt 3g Stannous chloride (dihydrate) Igp-aminophenol 0.1g Sodium hydroxide 8g Glacial acetic acid
Add 15m12 water
lo00mQ color developer Sodium tetrapolyphosphate 2g Sodium sulfite 7g Sodium tertiary phosphate (
dihydrate) 36g Potassium bromide 1g Potassium iodide (0.1% solution) Sodium 901 hydroxide 3g Citrazic acid
1.5 g N-ethyl-N-β-methanesulfonamidoethyl 3-methyl-4-aminoaniline sulfate 11 g 1.8-dihydroxy-3,6-cythiaoctane g Add water to adjust solution Sodium sulfite ethylenediaminetetraacetic acid Nathio Add glycerin and glacial acetic acid to bleach solution 000mQ 2g Rum (dihydrate) 8g 0.4mQ mQ 1000m12 Sodium ethylenediaminetetraacetate (dihydrate) 2g
Ammonium (dihydrate) 120g ammonium bromide 100g Add water 1000+n+2 fixer Ammonium thiosulfate 80g Sodium sulfite 5g Sodium bisulfite 5g Add water
1ooO+++I2 Stabilized liquid formalin (37% by weight) Ev+Q
Konidax (manufactured by Konica Corporation) 5+++
After the 1000+1112 wedge exposure, the density of the treated sample was measured using blue light, and the maximum density was determined and shown in Table 3.

On the other hand, the sample exposed to the MTF pattern was measured using a microdensitometer through a blue filter. 20
The MTF values at cyc+2e/mm are shown in Table 3.

Procedural Amendment Table 3 From Table 3, according to the present invention, it is possible to produce a silver halide color light-sensitive material in which the coloring density of the yellow coupler is high and the sharpness is good.

〔Effect of the invention〕

By using the yellow coupler represented by the general formula (I), the color density and sharpness of the silver halide color photographic light-sensitive material can be improved, and the sensitivity can be increased.

Claims (1)

[Scope of Claims] A silver halide color photographic material characterized by having at least one layer containing a coupler represented by the following general formula [I]. General formula [I] ▲ Numerical formulas, chemical formulas, tables, etc. are available▼ [In the formula, R_1 represents a group that can be substituted on the benzene ring. X represents a sulfonyl group, an acyl group, an oxycarbonyl group, or a carbamoyl group. Z represents a sulfonylamino group, a carbamoyl group, an acylamino group, an oxycarbonylamino group, a ureido group, a sulfonyloxy group, and an acyloxy group. ]