Novel pyrazolone photographic color couplers and photographic el

Details Novel pyrazolone photographic color couplers and photographic el Novel pyrazolone photographic color couplers and photographic el

1989-05-30

1990-02-13

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430544, G03C 738

Patent

active

049006576

ABSTRACT:
Pyrazolone magenta dye-forming couplers are described which provide excellent formaldehyde stability and which result in dyes having good stability to light, heat and moisture and which have higher .beta.max values as compared with dyes obtained from prior described pyrazolone couplers.

REFERENCES:
patent: 3227554 (1966-01-01), Barr et al.
patent: 4199361 (1980-04-01), Furutachi
patent: 4351897 (1982-09-01), Aoki et al.
patent: 4556630 (1985-12-01), Furutachi et al.
patent: 4584266 (1986-04-01), Hirose et al.

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