Patent · US Expired

Bleach fixing process

US5149618A · kind A · utility

15Cited by

3References

3Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Gustav Tappe · Leverkusen, DE
Ralf Wichmann · Bensberg, DE
Heinz Meckl · Bensberg, DE
Edgar Draber · Odenthal, DE

Key dates

Filing date	Sep 20, 1991
Grant date	Sep 22, 1992
Priority date	—
Expiry date	Sep 20, 2011

Classification

Technology area (CPC G)Physics
CPC primaryG03C7/42
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The process for bleach fixing an exposed and developed color photographic material whose silver halide emulsion layers contain silver chlorobromide emulsions having a silver bromide content of from 0.3 to 2.0 mol%, in which the bleach fixing bath (1) contains, as bleaching agent, an iron(III) complex at least 50 mol% of whose complex former corresponds to the following formula ##STR1## (2) is adjusted to a pH of x where 7.0>.times.>4.5 and (3) contains a thiosulphate is distinguished by a powerful bleaching action and great environmental compatibility.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.