Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Reexamination Certificate
1999-08-04
2001-01-23
Schilling, Richard L. (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
C430S214000, C430S218000, C430S559000
Reexamination Certificate
active
06177227
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a silver halide color light-sensitive material. More particularly, the present invention relates to a heat-development silver halide color photographic light-sensitive material that can form an excellent image even by subjecting to development for a short period of time, and that is excellent in color reproduction.
BACKGROUND OF THE INVENTION
The method wherein a diffusion dye is released or formed imagewise by heat development and the resultant diffusion dye is transferred to a dye-fixing element is practically used. In this method, by changing the type of the dye-providing compound to be used or the type of the silver halide to be used, a negative dye image, as well as a positive dye image, can be obtained. More details are described in U.S. Pat. No. 4,500,626, U.S. Pat. No. 4 483 914, U.S. Pat. No. 4 503 137, U.S. Pat. No. 4 559 290, JP-A-58-149049 (“JP-A” means unexamined published Japanese patent application), JP-A-60-133449, JP-A-59-218443, JP-A-61-238056, EP-A-210 660 (A2), and the like.
With respect to the method for obtaining, particularly, a positive color image by heat development, various methods are proposed. For example, U.S. Pat. No. 4,559,290 describes a method wherein a so-called DRR compound (a diffusion-dye releasing-type redox compound) is used, which has been formed into an oxidized compound incapable of releasing a dye image. In this method, a reducing agent is oxidized in proportion to the exposure amount of a silver halide by heat development, and the above oxidized compound is reduced with the unoxidized remaining reducing agent, to cause a diffusion dye to be released, to form a positive color image. Further, U.S. Pat. No. 4,783,396 and the Journal of Technical Disclosure (“Kokai Giho”) No. 87-6199 (Vol. 12, No. 22) describe heat-development color light-sensitive materials wherein use is made, as a compound capable of releasing a diffusion dye by the same mechanism, of a compound capable of releasing a diffusion dye by cleavage of the N-X bond, in which X represents for an oxygen atom, a nitrogen atom, or a sulfur atom, in a reducing fashion.
Moreover, as described, for example, in the October edition of “Eizo Joho” (issued on Oct. 1, 1993), edited by Ken Kuniyone and published by Sangyo Kaihatsu Kiko KK, recently the progress of computer graphics and the like is remarkable, and high-image-quality color printers (color hard copies) of various systems for outputting the image information thereof are developed. Among them, printers wherein heat-development color light-sensitive materials using silver halides are used, such as “FUJIX PICTOGRAPHY 3000” or “PICTROSTAT DIGITAL 400”, trade names, manufactured by Fuji Photo Film Co., Ltd., are sold or made public.
Since these apparatuses carry out negative-positive conversion in a digital fashion, as the light-sensitive materials used therein, a conventional DRR compound can be used as it is, and the discrimination is excellent.
By using these light-sensitive materials, a high-quality dye image can be obtained in a short period of time. However, in recent years, it is desired to quicken the process further in the market. To shorten the processing time further, it is conceived to carry out the process at a higher temperature, but control of the period of the process under such a condition becomes difficult, leading to unevenness of the image or the like, sometimes.
On the other hand, the technique for accelerating development by addition of a reducing agent, such as phenidone, as an electron transport agent (an electron transferring agent), has long been known. Nevertheless, when the existing reducing agent is used, harmful effects occur, such as deterioration of the stability of light-sensitive materials, an increase in the density of the white background, and lowering in color separation.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a silver halide color photographic light-sensitive material that can provide an image excellent in discrimination even by subjecting to development for a short period of time, and that is excellent in color separation.
Other and further objects, features, and advantages of the invention will appear more fully from the following description.
DETAILED DESCRIPTION OF THE INVENTION
The object of the present invention is attained by the following light-sensitive materials and dye-forming method:
(1) A heat-development color photographic light-sensitive material having on a base at least two applied silver halide emulsion layers different in color sensitivity from each other and at least one applied non-light-sensitive layer, wherein the silver halide emulsion layer or the non-light-sensitive layer contains a dye providing compound and at least one diffusible electron transport agent represented by formula (1) or (2):
wherein R
1
, R
2
, R
3
, and R
4
each represent a hydrogen atom, a halogen atom, a cyano group, or an alkyl group, an aryl group, a heterocyclic group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an alkylcarbonyl group, an arylcarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an alkylcarbonamido group, an arylcarbonamido group, an alkylsulfonamido group, an arylsulfonamido group, an alkylcarbonyloxy group, an arylcarbonyloxy group, a carbamoyl group, an alkylcarbamoyl group, an arylcarbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a sulfamoyl group, an alkylsulfamoyl group, an arylsulfamoyl group, a ureido group, or a urethane group that respectively has 4 or less carbon atoms or an I/O value of 1 or more, and R
5
represents an alkyl group, an aryl group, a heterocyclic group, an alkylamino group, an arylamino group, or a heterocyclic amino group, and wherein the non-light-sensitive layer contains a compound capable of reacting with an oxidized product of the electron transport agent;
(2) The heat-development color photographic light-sensitive material as stated in the above (1), wherein the compound capable of reacting with the oxidized product of the electron transport agent is a compound represented by the following formula (A):
wherein R
11
and R
12
each represent a hydrogen atom, a halogen atom, a carboxyl group or a sulfo group that may be in the form of a salt, or a substituted or unsubstituted alkyl group, aryl group, acylamino group, alkoxy group, aryloxy group, alkylthio group, arylthio group, carbamoylamino group, alkoxycarbonylamino group, aryloxycarbonylamino group, carbamoyl group, acyl group, alkoxycarbonyl group, aryloxycarbonyl group, sulfamoyl group, or sulfonyl group, one of X
1
, X
2
, X
3
, and X
4
represents a hydroxyl group, at least one of the rest thereof represents a hydroxyl group, a sulfonamido group, or a carbonamido group, and others of the rest thereof each represent one of the above-mentioned atoms or groups represented by R
11
, and R
12
, and the total number of carbon atoms of R
11
, R
12
, X
1
, X
2
, X
3
, and X
4
is 10 or more;
(3) The heat-development color photographic light-sensitive material as stated in the above (1), wherein the compound capable of reacting with the oxidized product of the electron transport agent is a coupler capable of forming a non-diffusion dye, or a non-dye-forming coupler (a so-called colorless coupler);
(4) The heat-development color photographic light-sensitive material as stated in any one of the above (1) to (3), wherein the compound capable of reacting with the oxidized product of the electron transport agent is a non-diffusion compound; and
(5) An image-forming method, comprising subjecting the silver halide color photographic light-sensitive material as stated in the above (1) to heat development, to release or form a diffusion dye imagewise, and transferring the diffusion dye to a dye fixing element.
Now, the compounds represented by formula (1) or (2) are described in detail.
The compounds represented by formula (1) or (2) are called sulfonamidophenols collectively and are substantially colorless reducing agents. When the oxidized
Birch & Stewart Kolasch & Birch, LLP
Fuji Photo Film Co. , Ltd.
Schilling Richard L.
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