Inventors:
Claude F. Gerbal - Bonneuil-sur-Marne, FR
Thomas E. Gompf - Rochester NY
Pierre D. Collet - Nogent-sur-Marne, FR
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
G03C 140
G03C 110
G03C 700
Abstract:
A nondiffusible sulfonamido compound which is alkali-cleavable upon oxidation to release a diffusible photographically useful material, said nondiffusible sulfonamido compound having the formula: ##STR1## wherein: (a) R. sup. 1 is alkyl, aryl sulfamyl, carbamyl, carbonamido, carbonyl, carbonyloxy or sulfonamido; (b) R. sup. 2 is alkyl having from 1 to 18 carbon atoms, aryl, or alkylphenyl having from 7 to 12 carbon atoms; (c) R. sup. 3 and R. sup. 4 are independently alkyl, or aryl, or R. sup. 3 and R. sup. 4, taken together, form a fused carbocyclic or heterocyclic ring; (d) NHSO. sub. 2 PUG represents a sulfonamido group; (e) PUG represents a photographically useful group; and (f) at least one of R. sup. 1, R. sup. 2, R. sup. 3, or R. sup. 4, or any combination thereof, provides a molecular configuration of such size or shape as to render the compound nondiffusible under alkaline processing conditions, is useful as a redox releaser in photosensitive elements, photographic film units and in processes for transferring and/or retaining a photographic image in color diffusion transfer units. These elements, film units and processes produce retained color images having substantially reduced minimum densities.