Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...
Patent
1988-12-27
1989-11-07
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified radiation sensitive composition with color...
430552, 430553, 430567, G03C 119, G03C 120, G03C 734
Patent
active
048792063
ABSTRACT:
A silver halide color photographic material which comprises a support having provided thereon at least one silver halide emulsion layer containing a cyan dye image-forming coupler represented by the following general formula (I), wherein the emulsion layer comprises silver bromide grains or silver chloro-bromide grains in which tabular grains having a mean aspect ratio of 5 or more amount to 50% or more based on the total projection area of the whole grains, and which are spectrally sensitized with a cyanine dye of the trimethine or pentamethine type or a merocyanine dye, which dye has a desensitization degree of 10 or more, thereby achieving high sensitivity and excellent fastness of photographic images and ensuring uniform quality in mass production: ##STR1## wherein R.sub.1 and R.sub.2 each represents a substituted or ubsubstituted aliphatic, aromatic or heterocyclic group; R.sub.3 represents a hydrogen atom, a halogen atom, a substituted or unsubstituted aliphatic or aromatic group or an acylamino group, and further R.sub.3 may be non-metallic atomic groups which form with R.sub.2 a nitrogen-containing 5- or 6-membered ring; Y.sub.1 represents a hydrogen atom, or a group which is eliminable upon an oxidative coupling reaction with a developing agent; and n represents 0 or 1; and further the coupler may take a polymeric form, including a dimeric form, via a group represented by R.sub.1, R.sub.2 or Y.sub.1.
REFERENCES:
patent: 4414306 (1983-11-01), Wey et al.
patent: 4425426 (1984-01-01), Abbott et al.
patent: 4439520 (1984-03-01), Kofron et al.
patent: 4513081 (1985-04-01), Okazaki et al.
patent: 4564586 (1986-01-01), Aoki et al.
Buscher Mark R.
Fuji Photo Film Co. , Ltd.
Michl Paul R.
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