Processing low silver black-and-white photographic elements with

Details Processing low silver black-and-white photographic elements with Processing low silver black-and-white photographic elements with

1999-10-26

2000-08-29

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Developer

430455, 430480, 430483, 430567, G03C 526, G03C 530, G03C 538

Patent

active

061106550

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: 5853964 (1998-12-01), Opitz et al.
patent: 5866309 (1999-02-01), Fitterman et al.
patent: 5948602 (1999-09-01), Yamashita et al.

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