Azo and azomethine dye developers

Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...

Patent

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Details

430224, 430559, 430562, 430563, G03C 140, G03C 554, G03C 726

Patent

active

046561170

ABSTRACT:
There are described novel azo and azomethine dye developers which include a pyrazolone moiety having two silver halide developing groups. In one embodiment the dye developers are metal complexed. The dye developer compounds are useful in photographic products and processes.

REFERENCES:
patent: 4174221 (1979-11-01), Idelson
patent: 4267252 (1981-05-01), Idelson
patent: 4267253 (1981-05-01), Idelson

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