Stabilization of developed photographic images

US3981731A · kind A · utility

Assignee

• AGFA-Gervaert AG · DE

Inventors

• Werner Berthold · Leverkusen, DE
• Anita von Konig · Krefeld, DE
• Helmut Timmler

Key dates

• Filing date: Nov 4, 1975
• Grant date: Sep 21, 1976
• Expiry date: Nov 4, 1995

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C1/42
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Photographic images are produced by imagewise exposure, development and stabilization in which development is carried out in the presence of an .alpha.,.alpha.'-[2,5-dimercapto-1,2,4-triazolyl-4-imino] -p-xylene compound which improves the stability of the silver image in extreme climatic conditions.