Stable photographic developers containing an indazole antifoggan

Details Stable photographic developers containing an indazole antifoggan Stable photographic developers containing an indazole antifoggan

1981-03-09

1982-04-06

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Developing

430444, 430446, 430452, 430467, 430481, 430485, 430488, 430489, 430490, 430491, 430966, G03C 530

Patent

active

043236421

ABSTRACT:
Lignosulfonates are incorporated in photographic developing compositions containing an indazole antifoggant in order to prevent or retard the precipitation of the indazole. Both black-and-white developing compositions, containing such developing agents as dihydroxybenzenes and/or pyrazolidones, and color developing compositions, containing primary aromatic amino color developing agents, are effectively stabilized against precipitation of indazole antifoggants by the lignosulfonates.

REFERENCES:
patent: 2271229 (1942-01-01), Peterson et al.
patent: 2865746 (1958-04-01), Bloom et al.
patent: 3471309 (1969-10-01), Thompson
patent: 3515556 (1970-06-01), Russell et al.
patent: 3972719 (1976-08-01), Vanreusel
patent: 4172728 (1979-09-01), Sincius et al.

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