Non-toxic photographic developer composition

Details Non-toxic photographic developer composition Non-toxic photographic developer composition

1991-01-28

1992-03-24

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Developing

430440, 430441, 430442, 430446, 430478, 430480, 430483, 430490, 430491, G03C 524

Patent

active

050988190

ABSTRACT:
An environmentally-safe, non-toxic non-hydroquinone and non-alkali metal hydroxide containing photographic developer composition is provided comprising a developer selected from the group consisting of ascorbic acid and sugar-type derivatives thereof, stereoisomers and diastereoisomers of ascorbic acid and its sugar-type derivatives, their salts and mixtures thereof, together with a sulfite, an alkali metal carbonate, and a 3-pyrazolidone developer compound.

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patent: 4753869 (1988-06-01), Long et al.
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