Photographic silver halide materials and process comprising new pyrazoloazole couplers

• Main Authors: CHEN; TEH-HSUAN, ROMANET; ROBERT F
• Format: Patent
• Language: English
• Published: 02.02.1993
• Subjects: AUXILIARY PROCESSES IN PHOTOGRAPHY; CHEMISTRY; CINEMATOGRAPHY; ELECTROGRAPHY; HETEROCYCLIC COMPOUNDS; HOLOGRAPHY; METALLURGY; ORGANIC CHEMISTRY; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES; PHOTOGRAPHY; PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHYSICS

Novel pyrazoloazole dye-forming couplers contain on the azole ring a group containing a carbon atom bonded directly to the azole ring and wherein this carbon atom is bonded directly to a nitrogen atom in the group. Such couplers provide advantageous bathochromic hue shift in dyes formed from the cou...