Color photographic silver halide material

US4906558A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Bruno Mucke · Bensberg, DE
• Franz Moll · Leverkusen, DE

Key dates

• Filing date: Oct 14, 1988
• Grant date: Mar 6, 1990
• Expiry date: Oct 14, 2008

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C1/09
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Color photographic silver halide material in which at least one layer contains a silver halide emulsion with 95 to 100 mol % of chloride which has been optimally ripened with a combination of at least one sulphur ripening body and at least one compound of the formula ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 denote, independently of one another, hydrogen or alkyl, and X.sup..crclbar. denotes an anion, combines excellent sensitivity with low fog and steep gradation, particularly in the threshold and shoulder region.