Patent · US Expired

Process for stabilizing photographic silver images

US5006440A · kind A · utility

0Cited by

2References

2Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Werner Berthold · Leverkusen, DE
Hans hlschlager · Bensberg, DE

Key dates

Filing date	Sep 21, 1990
Grant date	Apr 9, 1991
Priority date	—
Expiry date	Sep 21, 2010

Classification

Technology area (CPC G)Physics
CPC primaryG03C5/268
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A silver image produced by imagewise exposure, development and fixing of a photographic material containing at least one silver halide emulsion layer is stabilized by being subjected after fixing to treatment by a stabilizing bath containing a compound corresponding to general formula I EQU R.sub.1 --(NHCO--R.sub.2 --R.sub.3).sub.m (I) in which PA1 R.sub.1 represents a nitrogen-containing 5- or 6-membered heterocycle, PA1 R.sub.2 represents an optionally branched C.sub.1-8 alkylene radical, PA1 R.sub.3 represents Cl or Br and PA1 m=1 or 2.

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