Color photographic material

US5158864A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Reinhart Matejec · Leverkusen, DE
• Erich Wolff · Solingen, DE
• Heinrich Odenwalder · Leverkusen, DE
• Hans hlschlager · Bensberg, DE

Key dates

• Filing date: Sep 21, 1990
• Grant date: Oct 27, 1992
• Expiry date: Sep 21, 2010

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C7/305
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Light sensitive color photographic silver halide material containing at least one light sensitive silver halide layer with which a conventional diffusion fast color coupler is associated and optionally other layers, both light sensitive and light insensitive, in which material the one or more than one light sensitive silver halide layer contains, at a concentration of 10.sup.-3 to 10 mmol/mol of silver halide, a compound corresponding to the following formula EQU A(Z).sub.n K (I) absorbed on and adhering to the silver halide grain and reacting with the developer oxidation product (EOP) with an effective reaction rate constant of K.sub.eff .gtoreq.10.sup.3, in which formula PA0 A is a grain active bonding group, PA0 Z denotes a divalent intermediate member PA0 n is 0 or 1 and PA0 K denotes a group which forms a colored or uncolored reaction product in the reaction with the developer oxidation product, PA0 is found to have an improved sensitivity/graininess ratio.