Photographic dye diffusion transfer process

US4195992A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Rudolf Stolzenburg · Goldkronach, DE
• Paul Marx · Corning, US
• Walter Puschel · Leverkusen, DE

Key dates

• Filing date: Jul 18, 1978
• Grant date: Apr 1, 1980
• Expiry date: Jul 18, 1998

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C8/10
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Non-diffusible dye-providing components which may be used in association with a silver halide emulsion layer and on development yield diffusible yellow dyes of improved light fastness are cyanalkyl aminoazo dyes of the formula ##STR1## in which A.sup.1 represents oxidizable carrier residue; PA1 D represents a heterocyclic or carbocyclic aromatic residue completing an azo dye; and PA1 1, m and n are 0 or 1 such that EQU 1+m+n=1; PA1 and r represents an integer of from 1 to 4.