HIGH CONTRAST PHOTOGRAPHIC ELEMENT INCLUDING AN ARYL SULFONAMIDOPHENYL HYDRAZIDE CONTAINING AN ALKYL PYRIDINIUM GROUP

• Main Authors: LOOKER, JEROME J, KERR, DONALD L
• Format: Patent
• Language: English; French
• Published: 25.11.1991
• Edition: 5
• Subjects: AUXILIARY PROCESSES IN PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES; PHOTOGRAPHY; PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHYSICS

Silver halide photographic elements which are capable of high contrast development having incorporated therein, as a nucleating agent, an aryl sulfonamidophenyl hydrazide of the formula: where each R is an alkyl group, n is 1 to 3, X is an anion, m is 1 to 6, Y is a divalent aromatic radical, and R1...