Development of silver halide photosensitive material and develop

Details Development of silver halide photosensitive material and develop Development of silver halide photosensitive material and develop

1994-02-28

1994-10-18

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Developer

430434, 430445, 430446, 430486, G03C 5305

Patent

active

053567617

ABSTRACT:
Development of silver halide photosensitive material with a developer containing a developing agent and a free sulfite is accompanied by deposition of silver sludge. Silver sludge is effectively suppressed by adding to the developer (a) a six-membered heterocyclic compound which has a six-membered ring containing two nitrogen atoms and has a mercapto group, a hydroxyl group and one or two substituents having 2 to 20 carbon atoms in total or (a') a six-membered heterocyclic compound which has a six-membered ring containing three nitrogen atoms and has a mercapto group and a hydroxyl group.

REFERENCES:
patent: 3240603 (1966-03-01), Schuler et al.
patent: 4254215 (1981-03-01), Kramp et al.
patent: 4839273 (1989-06-01), Yamada et al.

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