Patent · US Expired

Light-sensitive color photographic material

US4250252A · kind A · utility

4Cited by

6References

5Claims

0Family size

Assignee

AGFA-Gervaert AG · DE

Inventors

Heinrich Odenwalder · Leverkusen, DE
Hans Vetter · Kempten (Allgäu), DE
Walter Puschel · Leverkusen, DE
Erwin Ranz · Leverkusen, DE

Key dates

Filing date	Oct 3, 1975
Grant date	Feb 10, 1981
Priority date	—
Expiry date	Oct 3, 1995

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S430/158
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

In a color photographic material wherein by color development there are produced either non-diffusing image dyes or diffusing image dyes (the latter being transferred to an image-receiving layer) the color development is controlled by means of non-diffusing thioether compounds which on color development release a diffusing mercapto compound but do not themselves form a dye. The mercapto compound inhibits the development of the silver halide and the thioether compound has the formula ##STR1## R.sub.1 =hydrogen or alkyl with 1-3 carbon atoms R.sub.2 =alkyl with up to 22 carbon atoms the group --S--Y is split off during color development and forms a mercaptane, e.g. 5-mercapto-1-phenyltetrazole, which inhibits the development.

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