Photographic materials and processes comprising color-...

Details Photographic materials and processes comprising color-... Photographic materials and processes comprising color-...

G - Physics

03

C

96/146, 96/274

G03C 7/00 (2006.01) C07D 241/50 (2006.01) C07D 241/52 (2006.01) C09B 17/02 (2006.01) G03C 7/32 (2006.01)

Patent

CA 1168501

- 0 - PHOTOGRAPHIC MATERIALS AND PROCESSES COMPRISING COLOR-FORMING SULFONAMIDODIPHENYLAMINE DYE PRECURSORS AND CORRESPONDING PHENAZINE DYES ABSTRACT OF THE DISCLOSURE In a photographic material for producing a dye image or a dye image and silver image comprising (1) a photographic metal salt, such as photographic silver halide, and (2) a dye precursor, improved images are provided by means of a color-forming para-sulfonamidodiphenylamine dye precursor having one or two sulfonamido groups in positions ortho to the -NH- moiety separating the two phenyl groups of the sulfonamidodiphenylamine and wherein the sulfon- amidodiphenylamine, in oxidized form, intramolecu- larly reacts to produce a sulfonamido-sudstituted phenazine dye. An exposed photographic material containing the color-forming sulfonamidodiphenyl- amine dye precursor is processed to produce a nega- tive phenazine dye-enhanced silver image. Alterna- tively, the exposed photographic material is processed to produce a positive phenazine dye image.

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