Photographic silver halide material and process

Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...

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430386, 430543, 430556, 430557, 430548, 430558, G03C 736, G03C 738

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active

048716529

ABSTRACT:
Novel cyano substituted photographic couplers are represented by the formula: ##STR1## wherein m, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and Z are as defined in the specification. These couplers enable effective magenta dye formation upon reaction with an oxidized color photographic silver halide developing agent. The couplers are useful in photographic silver halide materials and processes.

REFERENCES:
patent: 2380809 (1945-07-01), Verkinderen et al.
patent: 2435173 (1948-01-01), Bavley
patent: 2600788 (1952-06-01), Loria et al.
patent: 2897079 (1959-07-01), DeCat et al.
patent: 3502468 (1970-03-01), Rogers
Research Disclosure, Dec. 1978, Item No. 17643, vol. 176, Kenneth Mason Publications Ltd., Hampshire England.

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