Photographic materials and processes comprising color-forming su

Details Photographic materials and processes comprising color-forming su Photographic materials and processes comprising color-forming su

1981-07-06

1983-01-11

Brown, J. Travis

Radiation imagery chemistry: process, composition, or product th

Imaged product

430364, 430375, 430440, 430448, 430461, 430483, 430542, 430, G03C 700, G03C 140

Patent

active

043682464

ABSTRACT:
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 to two sulfonamido groups in positions ortho to the --NH-- moiety separating the two phenyl groups of the sulfonamidodiphenylamine and wherein the sulfonamidodiphenylamine, in oxidized form, intramolecularly reacts to produce a sulfonamido-substituted phenazine dye. An exposed photographic material containing the color-forming sulfonamidodiphenylamine dye precursor is processed to produce a negative phenazine dye-enhanced silver image. Alternatively, the exposed photographic material is processed to produce a positive phenazine dye image.

REFERENCES:
patent: 3482971 (1969-12-01), Bloom et al.
patent: 3498785 (1970-03-01), Bloom et al.
patent: 3622603 (1971-11-01), Bloom et al.
patent: 3658524 (1972-04-01), Piesach
patent: 3813244 (1974-05-01), Villard
patent: 3938995 (1976-02-01), Gompf et al.
patent: 4110355 (1978-08-01), Bloom
Research Disclosure, Dec., 1978, Item No. 17643, Jun., 1978, Item No. 17029.

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