Processing of low silver black-and-white photographic elements w

Details Processing of low silver black-and-white photographic elements w Processing of low silver black-and-white photographic elements w

1999-05-18

2000-03-07

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

Developing

430446, G03C 526

Patent

active

060338377

ABSTRACT:
Low silver black-and-white photographic elements, such as radiographic films, can be processed quickly using black-and-white developing and fixing compositions having reduced photoprocessing activity. The entire process is fairly rapid and effective despite the lowered concentrations of photographic developing and fixing agents. The processing compositions are more environmentally friendly because the conventional hydroquinone is replaced with an ascorbic acid developing agent. In addition, the processing compositions are free of ammonium ions.

REFERENCES:
patent: 5780209 (1998-07-01), Yamashita
patent: 5800976 (1998-09-01), Dickerson et al.
patent: 5866309 (1999-02-01), Fitterman et al.
patent: 5948602 (1999-09-01), Yamashita et al.

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