Color-photographic recording material containing a highly reactive dir-coupler

US4315070A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Erwin Ranz · Leverkusen, DE
• Joachim W. Lohmann · Odenthal, DE
• Heinz-Dieter Schutz · Bensberg, DE

Key dates

• Filing date: Jun 12, 1980
• Grant date: Feb 9, 1982
• Expiry date: Jun 12, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/158
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

In high sensitivity color photographic recording materials the undesired color fog density is reduced by highly reactive DIR-compounds having an effective reaction velocity constant k.sub.eff of more than 20,000 [1 . mole.sup.-1 . sec.sup.-1 ] (measured at pH 10.2 by the method described hereinafter) in a concentration of from 10.sup.-5 to 10.sup.-3 mole per mole of silver halide, if contained in a light-sensitive silver halide emulsion layer or in a concentration of from 10.sup.-7 to 10.sup.-5 mole per gram of solids if contained in a silver-halide-free binder layer adjacent to a silver halide emulsion layer.