Photographic element containing an azopyrazolone masking coupler

Details Photographic element containing an azopyrazolone masking coupler Photographic element containing an azopyrazolone masking coupler

1993-09-30

1996-01-09

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430554, 430555, 430558, 430386, 430387, G03C 7333, G03C 738, G03C 7384

Patent

active

054828210

ABSTRACT:
The invention provides a photographic process and element where the element comprises a light sensitive silver halide layer containing (1) an image dye-forming bicyclic azole coupler having bonded to the coupling site a group other than hydrogen which is clearable during the development process; (2) an azopyrazolone masking coupler; and (3) a stabilizing coupler having bonded to the coupling site only hydrogen atoms and/or carbon atoms which are not cleavable to permit dye formation during development.

REFERENCES:
patent: 3912513 (1975-10-01), Monbaliu et al.
patent: 3930866 (1976-01-01), Oishi et al.
patent: 4070191 (1978-01-01), Imamura et al.
patent: 4600688 (1986-07-01), Kawakatsu et al.
patent: 4977072 (1990-12-01), Renner et al.
patent: 5219719 (1993-06-01), Kida
patent: 5262288 (1993-11-01), Sakanoue et al.
patent: 5270156 (1995-12-01), Hirabayashi

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