Process for stabilizing photographic silver images

US4987059A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Werner Berthold · Leverkusen, DE
• Helmut Haseler · Leverkusen, DE
• Paul Marx · Corning, US
• Heinz Meckl · Bensberg, DE
• Hans hischlager · Bensberg, DE

Key dates

• Filing date: Nov 17, 1989
• Grant date: Jan 22, 1991
• Expiry date: Nov 17, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/164
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Excellent image silver stability is obtained without intermediate washing after fixing and without a special finishing bath by a process for stabilizing a silver image produced by exposure, development and fixing of a photographic material containing at least one silver halide emulsion layer, in which, immediately after fixing, the photographic material is subjected to treatment by a stabilizing bath containing a compound corresponding to general formula (I) ##STR1## in which X=Cl, Br PA1 R.sup.1 =H, C.sub.1-4 alkyl, C.sub.6-10 aryl, PA1 R.sup.2 =CHO, COOH, COONa, CH.sub.2 COOH, CH.sub.2 COONa, CONR.sub.2.sup.3, CONHR.sup.3, PA1 R.sup.3 =H, C.sub.1-2 alkyl, and a compound corresponding to formula II ##STR2## and/or to formula III ##STR3## in which R.sup.3 and R.sup.4 may be the same or different and represent H, --NH.sub.2, alkyl, alkenyl, cycloalkyl, aryl, alkoxy, alkylthio, alkylsulfonyl, sulfamoyl, acyl, --SH or a heterocyclic group.