Sulfonamido dye releaser in photographic dye diffusion transfer

US4110113A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Arnfried Melzer · Cologne, DE
• Paul Marx · Corning, US
• Walter Puschel · Leverkusen, DE

Key dates

• Filing date: Jun 16, 1977
• Grant date: Aug 29, 1978
• Expiry date: Jun 16, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/159
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

In the photographic dye-diffusion transfer process use is made of dye-giving compounds, which are non diffusing in photographic binder layers, and which during development if oxidized imagewise in accordance with the silver halide developed are split owing to the alkali of the developer composition to release diffusing dyes, which are transferred to an image-receiving layer. The dye-giving compounds have the formula EQU Y--NH--Ar--NH--SO.sub.2 --X PA1 ar represents an arylene radical such that the group Y--NH-- is attached to the group --NH--SO.sub.2 --X through a chain of n(n=1,2,3, or 4) vinylene groups which are part of the arylene radical; PA1 X represents the radical of a dye or dye precursor; PA1 Y represents a --COR or --SO.sub.2 R radical; and PA1 R represents an alkyl, aryl or heterocyclic group and can constitute part of a second dye moiety.