Silver halide photographic material containing two-equivalent co

Details Silver halide photographic material containing two-equivalent co Silver halide photographic material containing two-equivalent co

1976-08-04

1978-02-07

Brown, J. Travis

Gas separation: apparatus

Electric field separation apparatus

And serially arranged nonelectrical separator

96 22, 96 561, 96 564, 96 565, 96 74, 96100R, G03C 700, G03C 140

Patent

active

040725251

ABSTRACT:
A photographic color coupler in which a hydrogen atom at the coupling position capable of coupling with an oxidation product of an aromatic primary amine developing agent is substituted with a group represented by the following general formula: ##STR1## wherein R and R', which may be the same or different, each represents an alkyl group, an alkenyl group, an aryl group, an alkoxy group, an alkylthio group, an aryloxy group, a hydroxy group, or an amino group, and R and R' can combine each other to form a ring; and X represents an oxygen atom or a sulfur atom. These photographic color couplers are a novel class of two-equivalent color forming couplers which are suitable for use in color photography. A color photographic light-sensitive material containing the above described photographic color coupler and a method of forming a color image comprising developing an exposed photographic light-sensitive material in the presence of the above described photographic color coupler are also disclosed.

REFERENCES:
patent: 3770446 (1973-11-01), Sato et al.
patent: 3884700 (1975-05-01), Quaglia
patent: 3984432 (1976-10-01), Piller et al.

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