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Priority to BE643146ApriorityCriticalpatent/BE643146A/xx
Publication of BE643146ApublicationCriticalpatent/BE643146A/xx
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
G03C7/32—Colour coupling substances
G03C7/36—Couplers containing compounds with active methylene groups
G03C7/38—Couplers containing compounds with active methylene groups in rings
G03C7/384—Couplers containing compounds with active methylene groups in rings in pyrazolone rings
