Silver halide color photographic element and process containing

Details Silver halide color photographic element and process containing Silver halide color photographic element and process containing

1974-07-10

1976-02-17

Brown, J. Travis

Gas separation: apparatus

Electric field separation apparatus

And serially arranged nonelectrical separator

96100, G03C 700, G03C 140

Patent

active

039389952

ABSTRACT:
Color photographic elements, compositions and processes for producing color negative images are described which employ a leuco dye comprising the reaction product of a color forming coupler and a N,N-dialkyl-p-phenylenediamine having an electronegative group attached to the benzene ring. The leuco dye is stable against aerial oxidation and can be developed to its corresponding dye with certain black and white developing compositions.

REFERENCES:
patent: 1102028 (1914-06-01), Fischer
patent: 2227981 (1941-01-01), Schinzel
patent: 3185567 (1965-05-01), Rogers
patent: 3342597 (1967-09-01), Harnish et al.
patent: 3723117 (1973-03-01), Willems
patent: 3770437 (1973-11-01), Brugger et al.

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