Pyrazolo 1,5 a benzimidazole photographic color couplers

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified radiation sensitive composition with color...

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430543, 430955, G03C 108, G03C 726, G03C 732

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active

058769129

ABSTRACT:
an alkylene-, oxyalkylene- or arylene- thio coupling-off group, substituted with a carboxylic acid or dialkylamino group, have dye-forming and/or bleach-accelerating properties. The couplers are generally associated with a silver halide emulsion layer coated on a support to form a single color or multi-color photographic element.

REFERENCES:
patent: 5143821 (1992-09-01), Crawley et al.
Research Disclosure 24241, Jun. 1984.

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