EP 0035235 A3 19811216 - PROCESS FOR THE MANUFACTURE OF PHOTOGRAPHIC IMAGES; PHOTOGRAPHIC MATERIAL SUITABLE TO THIS PROCESS AND PHOTOGRAPHIC IMAGES OBTAINED THEREWITH
Title (en)
PROCESS FOR THE MANUFACTURE OF PHOTOGRAPHIC IMAGES; PHOTOGRAPHIC MATERIAL SUITABLE TO THIS PROCESS AND PHOTOGRAPHIC IMAGES OBTAINED THEREWITH
Publication
Application
Priority
GB 8006847 A 19800228
Abstract (en)
[origin: US4353974A] A process for the production of a photographic image which comprises (a) imagewise exposing a photographic assembly which comprises at least during a silver halide developing step, in order optionally a supercoat layer, at least one silver halide emulsion layer, a layer containing a layer substantive hydroxypyridone azamethine compound of the general formula <IMAGE> (1) wherein R1 is hydrogen or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl, amino or heterocyclic radical, Y represents hydrogen or hydroxy, -CN, -COOR1, -CONR1R2 or -COR1 or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical and Z is hydrogen or is -CN, -COOR3, -CONR3R4, -SO3H, -SO3- or -COR3, where R1, R2, R3 and R4 each independently represent hydrogen or an optionally substituted alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radical, and E represents the atoms necessary to complete an optionally substituted heterocyclic or aromatic ring, and a support, there being optionally one or more interlayers between each of said components, (b) treating the exposed photographic assembly with an aqueous alkaline processing bath, containing a silver halide developer and (c) in the non-latent image areas, allowing the silver halide developer to diffuse in a counter-imagewise manner from the silver halide emulsion layer(s) to the layer containing the compound of formula (1) and there to bleach the compound to form a photographic dye image. The developers used in this process exhibit an increased stability against oxidizing agents.
IPC 1-7
IPC 8 full level
G03C 7/02 (2006.01); G03C 1/00 (2006.01); G03C 5/16 (2006.01); G03C 5/29 (2006.01); G03C 5/30 (2006.01); G03C 7/28 (2006.01); G03C 8/08 (2006.01)
CPC (source: EP US)
G03C 5/16 (2013.01 - EP US); G03C 5/3028 (2013.01 - EP US); G03C 7/28 (2013.01 - EP US); G03C 8/08 (2013.01 - EP US); Y10S 430/162 (2013.01 - EP US)
Citation (search report)
- DE 2846688 A1 19790503 - CIBA GEIGY AG
- FR 2407495 A1 19790525 - CIBA GEIGY AG [CH]
- GB 2047419 A 19801126 - CIBA GEIGY AG
- DE 2808825 A1 19780907 - CIBA GEIGY AG
- FR 2382485 A1 19780929 - CIBA GEIGY AG [CH]
- GB 2007378 A 19790516 - CIBA GEIGY AG
- CH 541822 A 19730915 - CIBA GEIGY AG [CH]
- DE 1036640 B 19580814 - POLAROID CORP
- GB 853480 A 19601109 - POLAROID CORP
- EP 0016732 A1 19801001 - CIBA GEIGY AG [CH]
Designated contracting state (EPC)
BE CH DE FR GB IT
DOCDB simple family (publication)
EP 0035235 A2 19810909; EP 0035235 A3 19811216; JP S56140339 A 19811102; US 4353974 A 19821012
DOCDB simple family (application)
EP 81101377 A 19810225; JP 2708581 A 19810227; US 23701281 A 19810223