Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Reexamination Certificate
2000-09-29
2002-01-08
Schilling, Richard L. (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
C430S359000, C430S226000, C430S549000
Reexamination Certificate
active
06337176
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 11-276338, filed Sep. 29, 1999, the entire contents of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
The present invention relates to a silver halide color photographic lightsensitive material which can be rapidly processed and which has been improved with respect to color reproduction and sharpness with the use of a colored coupler.
Among the silver halide color photographic lightsensitive materials, photographic film lightsensitive materials for use in photographing (hereinafter also referred to as “films”) have silver coating amounts greater than those of print materials (hereinafter also referred to as “prints”), so that the loads on development and desilvering steps are heavy to thereby generally prolong the development processing time.
On the other hand, in accordance with the recent scattering of color laboratory (development location), the number of city photograph shops and other small-scale color laboratories, called “minilaboratories”, which carry out development processing (hereinafter simply referred to as “processing”) at shops is increasing, and there is a conspicuous trend for the shop processing performed at minilaboratories to replace the conventional processing that presupposes collection and delivery. At the shop processing, it is especially an important task to shorten the appointed period for completion, and, above all, it is desired to shorten the film processing time including that for development.
In order to provide means for shortening the film processing time, films carrying a high-silver chloride emulsion wherein the silver halide is mainly composed of silver chloride have been disclosed as replacement for the conventional films carrying a high-silver bromide emulsion wherein the silver halide is mainly composed of silver bromide. The former emulsion exhibits a high reaction rate at the time of development and is substantially free from the release of iodide ions which are inhibitory in fixing operation as compared with the latter emulsion, so that the former emulsion could be stated as being excellent in respect of the attainment of rapid processing and the reduction of replenisher quantity. As an example of such high-silver chloride emulsions, there can be mentioned the disclosure of a technology using a high-silver chloride emulsion having the (111) faces in Jpn. Pat. Appln. KOKAI Publication No. (hereinafter referred to as JP-A-) 63-212932. Further, there can be mentioned the disclosure of a tabular emulsion having the (100) faces in U.S. Pat. No. 5,264,337.
Apart from the above, in recent years, there is an increasing demand for the enhancement of image quality in, for example, color reproduction and sharpness with respect to lightsensitive materials. Thus, a lightsensitive material free from the deterioration of image quality even under shortened processing time conditions is now demanded. As a means for enhancing the image quality, there is known, for example, the releasing of photographically useful compounds such as a development inhibitor during development processing. However, when the processing time is short, there is no sufficient time for the released compound to fully exert its effect. Accordingly, the contribution thereof to the enhancement of image quality would not be satisfactory.
Attempts for enhancing the image quality in the use of high-silver chloride emulsions have been made. For example, the method of adding DIR compounds is described in U.S. Pat. No. 5,356,764. Further, the method of adding compounds capable of releasing photographically useful compounds at the time of development is described in International Patent Publication 94/22051. Some image quality enhancement can be attained by these methods. However, they can never be stated as being satisfactory.
On the other hand, the method of enhancing the image quality of color photographic lightsensitive material with the use of magenta colored yellow couplers is described in, for example, U.S. Pat. No. 5,399,468. This method, although providing a means for enhancing the image quality, has not been one which attains such a conspicuous image quality enhancement as cannot be anticipated from the enhancement by the use of DIR compounds.
As apparent from the above, it has been difficult to realize rapid processing while ensuring a high image quality by the employment of conventional technology.
BRIEF SUMMARY OF THE INVENTION
Therefore, an object of the present invention is to provide a silver halide color photographic lightsensitive material which can be processed within a short period of time, and, irrespective of the shortened processing, realizes satisfactorily enhanced color reproduction and sharpness.
The above object can be attained by the following silver halide color photographic lightsensitive material.
(1) A silver halide color photographic lightsensitive material comprising a support and, superimposed thereon, at least one red-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer and at least one blue-sensitive silver halide emulsion layer, wherein each of the at least one red-sensitive emulsion layer, the at least one green-sensitive emulsion layer, and the at least one blue-sensitive emulsion layer contains a silver halide emulsion whose silver chloride content is in the range of 50 to 100 mol % and wherein at least one of the silver halide emulsion layers contains a compound of the general formula (I):
Cp—(L)
n
—B (I)
wherein Cp represents a yellow coupler residue capable of reacting with a developing agent in an oxidized form to thereby release —(L)
n
—B; L represents a divalent connecting group or timing group; B represents a group required to form magenta image in the form of Cp—(L)
n
—B at least after development, while the released —(L)
n
—B group substantially does not contribute to any image formation after development; and n is 0 or 1.
(2) The silver halide color photographic lightsensitive material as recited in item (1) above, wherein the yellow coupler residue Cp is represented by formula (I-A) or (I-B):
wherein, * represents a position at which the yellow coupler residue Cp is bonded to —(L)
n
—B of the general formula (I); R
11
represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; R
12
represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; and a is 0 or 1,
wherein * represents a position at which the yellow coupler residue Cp is bonded to —(L)
n
—B of the general formula (I); R
13
represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; each of R
14
and R
15
independently represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; and b is 0 or 1.
(3) The silver halide color photographic lightsensitive material as recited in item (2) above, wherein the yellow coupler residue Cp represented by formula (1-A) is represented by formula (I-C):
wherein * represents a position at which the yellow coupler residue Cp is bonded to —(L)
n
—B of the general formula (I); R
16
represents a tertiary alkyl group, an aryl group or an indolinyl group; R
17
represents a halogen atom, an alkoxy group, an aryloxy group or an alkyl group; R
18
represents an acylamino group, a sulfonamido group, a carbamoyl group, a sulfamoyl group, an alkoxycarbonyl group or a sulfonyl group; and R
19
represents a hydrogen atom or a substituent.
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 INVE
Ito Takayuki
Matsumoto Keisuke
Birch & Stewart Kolasch & Birch, LLP
Fuji Photo Film Co. , Ltd.
Schilling Richard L.
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