Photographic material suited for use in diffusion transfer photography

US4371604A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Christian C. Van de Sande · Belsele, BE
• Wilhelmus Janssens · Aarschot, BE
• Wolfgang Lassig · Munich, DE
• Ernst Meier · Munich, DE

Key dates

• Filing date: Mar 31, 1981
• Grant date: Feb 1, 1983
• Expiry date: Mar 31, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/156
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A photographic material for diffusion transfer photography containing a quinonoid compound, which is capable in reduced state and under alkaline conditions of releasing a photographically useful group and corresponds to one of the following general formulae: ##STR1## wherein: each of (Nuox).sup.1 and (Nuox).sup.2 (same or different) represents an oxidized nucleophilic group, PA1 Z represents a bivalent atom or bivalent atomic group, which is electro-negative, PA1 Q together with the group Z represents a releasable photographically useful group, PA1 Y.sup.1 and Y.sup.2 together represent the necessary atoms to close a p-quinonoid ring substituted with (a) directly linked monovalent organic ring or ring system substituent(s) having aromatic character, PA1 Y.sup.3 represents the necessary atoms to close a o-quinonoid ring substituted with (a) directly linked monovalent organic ring or ring system substituent(s) having aromatic character, and PA1 each of R.sup.1 and R.sup.2 (same or different) represents hydrogen or a (substituted) hydrocarbon group, and at least one of R.sup.1, R.sup.2 and a substituent on the quinonoid ring being or carrying a ballasting group.