Process for forming black dye images

Details Process for forming black dye images Process for forming black dye images

1980-01-28

1981-03-03

Brown, J. Travis

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Using identified radiation sensitive composition in the...

430548, 430555, 430565, G03C 700, G03C 140

Patent

active

042542138

ABSTRACT:
A process for forming a dye image is disclosed which comprises processing an image-wise exposed silver halide photographic emulsion with an aromatic primary amine color developing agent in the presence of bis pyrazolines obtained by reacting 3-acylamino-5-pyrazolones with para-hydroxybenzaldehydes having at least one of the ortho positions to the hydroxy group substituted with a member selected from halogen, alkyl, aryl, amino or amido groups. The invention includes the present dye forming coupler alone and combined with the silver halide emulsion layer.

REFERENCES:
patent: 2294909 (1942-09-01), Jennings
patent: 2706683 (1955-04-01), Sawdey
patent: 3615509 (1971-10-01), Klein et al.
patent: 3674490 (1972-07-01), Matejec
patent: 3834908 (1974-09-01), Hara et al.
patent: 4189321 (1980-02-01), Kojima et al.

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