Bleaching starter and processing of color photographic silver ha

Details Bleaching starter and processing of color photographic silver ha Bleaching starter and processing of color photographic silver ha

1992-01-30

1993-01-05

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Bleach or intensification

430393, 430430, 430460, G03C 544

Patent

active

051769883

ABSTRACT:
A bleaching starter which contains an imidazole or a primary or secondary amine having a hydroxyalkyl radical as an alkaline agent which exhibits an improved desilvering function without odor and safety problems, the alkaline agent is selected from compounds represented by formulae (I) and (II): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently selected from the group consisting of a hydrogen atom, an alkyl radical, and an alkenyl radical, R.sub.5 is a hydroxyalkyl radical having up to 6 carbon atoms, and R.sub.6 is selected from group consisting of a hydrogen atom, an alkyl radical having up to 6 carbon atoms, and a hydroxyalkyl radical having up to 6 carbon atoms.

REFERENCES:
patent: 4292401 (1981-09-01), Itoh et al.
patent: 4923785 (1990-05-01), Frank
patent: 4933096 (1990-06-01), Demeyere et al.

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