Process for the production of photographic images

US4386155A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Peter Bergthaller · Bensberg, DE
• Friedrich-Wilhelm Kunitz · Wermelskirchen, DE
• Karl-Wilhelm Schranz · Langenfeld, DE
• Erich Wolff · Solingen, DE

Key dates

• Filing date: Sep 3, 1981
• Grant date: May 31, 1983
• Expiry date: Sep 3, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C7/413
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Colored images consisting of metal-complexed azomethine dyes are prepared by chromogenic development of silver halide photographic recording materials in the presence of color couplers. The color developers contain a grouping capable of metal chelate formation adjacent to the primary amino group. The azomethine dyes are transferred into the corresponding azomethine dye/metal complexes. The complex formation is accompanied by shift of color hue and increase of light stability.