Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...
Reexamination Certificate
2001-07-06
2003-12-02
Le, Hoa Van (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified radiation sensitive composition with color...
C430S552000, C430S558000
Reexamination Certificate
active
06656673
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2000-205307, filed Jul. 6, 2000, the entire contents of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a silver halide color photographic light-sensitive material and a color image formation method using the same.
2. Description of the Related Art
The color reproduction, particularly the saturation of a silver halide color photographic light-sensitive material is an important quality.
In the field of a so-called conventional silver halide color photographic light-sensitive material which uses an aromatic primary amine color developing agent and uses a coupling reaction between the oxidized form of this developing agent and an image forming coupler, various efforts have been made to improve the saturation of obtained images.
One methodology is to improve the spectral absorption characteristics of an image forming dye formed from a coupler.
As a magenta dye forming coupler, a pyrazolotriazole coupler which causes little side absorption and forms a preferred magenta dye is known.
As a cyan dye forming coupler, a phenol coupler as disclosed in, e.g., U.S. Pat. No. 5,686,235 is known as a coupler which causes little side absorption and forms a preferred cyan dye. The fifth position of this phenol coupler is substituted by an acylamino group having a sulfo group, and a dye formed by the coupler associates to produce a preferred hue.
In addition, U.S. Pat. No. 5,888,716 disclosed the combination of this associative phenol cyan coupler and the pyrazolotriazole magenta coupler. In its examples, U.S. Pat. No. 5,888,716 describes applications to silver halide color paper and the degrees of improvements of saturation.
The present inventors made extensive studies on improvements of the saturation of a silver halide color reversal film photographic light-sensitive material, and tested the combination of the cyan coupler and the magenta coupler disclosed in U.S. Pat. No. 5,888,716. Consequently, the graininess was largely worsened by the coupler combination disclosed in U.S. Pat. No. 5,888,716. Usually, the graininess of a silver halide color reversal film, which is formed into a printed document or an original of a print after photographing and development, is an important quality. Therefore, deterioration of the graininess is a crucial problem.
Another problem was that the color forming properties of the cyan coupler and the magenta coupler were unsatisfactory, and the behavior was unbalanced when the pH varied, thereby readily disturbing the color balance. In standard development processes (e.g., the E-6 process and CR56 process) of silver halide color reversal films, the pH of a color developer is set close to 11.9. The color generation behavior of the cyan coupler in this pH range is unknown. Furthermore, the problem that the present inventors encountered, i.e., the easy disturbance of the color balance caused by pH variations is unknown.
Because of the above problems, U.S. Pat. No. 5,888,716 did not disclose a good technique capable of applying the above-mentioned coupler combination to color reversal films. So, further improvements have been demanded.
BRIEF SUMMARY OF THE INVENTION
It is an object of the present invention to provide a silver halide color photographic light-sensitive material superior in color reproduction, graininess, and processing variation resistance, and a color image formation method using the same.
The object of the present invention was achieved by the following arrangements.
(1) A silver halide color photographic light-sensitive material having, on a support, at least one red-sensitive emulsion layer, at least one green-sensitive emulsion layer, and at least one blue-sensitive emulsion layer in this order from the support, wherein the at least one green-sensitive emulsion layer contains a coupler represented by formula (MC-I) below, and the at least one red-sensitive emulsion layer contains a coupler represented by formula (CC-I) below:
in formula (MC-I), R
1
represents a hydrogen atom or substituent; one of G
1
and G
2
represents a carbon atom, the other represents a nitrogen atom; and R
2
represents a substituent which substitutes one of G
1
and G
2
that is a carbon atom, provide that R
1
and R
2
can further have a substituent, a polymer having a repeating unit of formula (MC-I) can be formed via R
1
and/or R
2
, and at least one coupler of formula (MC-I) can bond to a polymer chain via R
1
or R
2
; X represents a hydrogen atom or a group which can split off in a coupling reaction with an oxidized formed of an aromatic primary amine color developing agent;
In formula (CC-I), R
c1
represents a hydrogen atom or alkyl group, R
c2
represents an alkyl group or aryl group, n is 1, 2, or 3, and each Y is positioned in the meta and/or para position of a phenyl group with respect to the sulfonyl group, and independently represents a group selected from the group consisting of alkyl, alkenyl, alkoxy, aryloxy, acyloxy, acylamino, sulfonyloxy, sulfamoylamino, sulfonamide, ureido, oxycarbonyl, oxycarbonylamino, and carbamoyl groups.
(2) A color image formation method comprising: developing the silver halide color photographic light-sensitive material described in item (1) above with a color developer containing an aromatic primary amine color developing agent and having a pH value of 11.5 or more.
Additional objects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out hereinafter.
DETAILED DESCRIPTION OF THE INVENTION
The coupler represented by formula (MC-I) will be explained in detail below.
In formula (MC-I), R
1
represents a hydrogen atom or substituent, and R
2
represents a substituent.
Examples of the substituent represented by R
1
and R
2
can be, for example, a halogen atom, an alkyl group (including a cycloalkyl group and a bicycloalkyl group), an alkenyl group (including a cycloalkenyl group and a bicycloalkenyl group), an alkynyl group, an aryl group, a heterocyclic group, a cyano group, a hydroxyl group, a nitro group, a carboxyl group, an alkoxy group, an aryloxy group, a silyloxy group, a heterocyclic oxy group, an acyloxy group, a carbamoyloxy group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an amino group (including an anilino group), an acylamino group, an aminocarbonylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, a sulfamoylamino group, alkyl- and arylsulfonylamino groups, a mercapto group, an alkylthio group, an arylthio group, a heterocyclic thio group, a sulfamoyl group, a sulfo group, alkyl- and arylsulfinyl groups, alkyl- and arylsulfonyl groups, an acyl group, an aryloxycarbonyl group, an alkoxycarbonyl group, a carbamoyl group, aryl and heterocyclic azo groups, an imido group, a phosphino group, a phosphinyl group, a phosphinyloxy group, a phosphinylamino group and a silyl group.
More specifically, examples of the substituent represented by R
1
and R
2
can be a halogen atom (e.g., a chlorine atom, bromine atom, and iodine atom), and an alkyl group [which represents a straight-chain, branched, or cyclic, substituted or unsubstituted alkyl group. Examples are an alkyl group (preferably a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, e.g., methyl, ethyl, n-propyl, isopropyl, t-butyl, n-octyl, eicosyl, 2-chloroethyl, 2-cyanoethyl, and 2-ethylhexyl), a cycloalkyl group (preferably a, substituted or unsubstituted cycloalkyl group having 3 to 30 carbon atoms, e.g., cyclohexyl, cyclopentyl, and 4-n-dodecylcyclohexyl), a bicycloalkyl group (preferably a substituted or unsubstituted bicycloalkyl group having 5 to 30 carbon atoms, i.e., a monovalent group obtain
Matsuda Naoto
Mikoshiba Hisashi
Birch & Stewart Kolasch & Birch, LLP
Fuji Photo Film Co. , Ltd.
Le Hoa Van
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