Photographic material and process

• Main Authors: CHEN, TEH-HSUAN, BEGLEY, WILLIAM JAMES
• Format: Patent
• Language: English; French; German
• Published: 04.09.1991
• 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

Photographic compound (A) capable of releasing a development inhibitor group by means of a displacement reaction enables increased image acutance when the compound contains in a coupling position a coupling-off group represented by the formula: wherein X, R1, R2, R3, R4, and Q are as defined in the...