Patent · US Expired

Photographic material with improved properties

US4210714A · kind A · utility

1Cited by

7References

5Claims

0Family size

Assignee

AGFA-Gervaert AG · DE

Inventors

Heinrich Odenwalder · Leverkusen, DE
Anita von Konig · Krefeld, DE
Franz Moll · Leverkusen, DE
Walter Patzold · Leverkusen, DE
Lothar Rosenhahn · Neunburg vorm Wald, DE
Friedhelm Sommer · Leverkusen, DE

Key dates

Filing date	Mar 15, 1978
Grant date	Jul 1, 1980
Priority date	—
Expiry date	Mar 15, 1998

Classification

Technology area (CPC G)Physics
CPC primaryG03C5/50
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Process for the preparation of silver images by imagewise exposure of a photographic material comprising at least one light-sensitive silver halide emulsion layer and treatment of the material with a developer composition, wherein the improvement comprises the development is carried out in the presence of 3-mercapto-5-(2-furyl)-1,2,4-triazole. The 3-mercapto-5-(2-furyl)-1,2,4-triazole decreases the fog during development, and when this is the first development in a black-and-white or color reversal process, increases the reversal silver or color density.

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