Photographic material comprising a bicyclic pyrazolo coupler

Details Photographic material comprising a bicyclic pyrazolo coupler Photographic material comprising a bicyclic pyrazolo coupler

1996-10-02

1998-09-22

Letscher, Geraldine

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430543, G03C 108, G03C 726, G03C 732

Patent

active

058112308

ABSTRACT:
Novel bicyclic pyrazolo couplers containing a fully substituted carbon at the 6-position of the bicyclic structure and a ballast group of formula (I): ##STR1## are useful in photographic materials and processes. The couplers exhibit increased coupling activity, and provide formation of dyes having improved maximum magenta image dye density, contrast, and photographic speed when employed in color photographic materials and processes. The variables are defined more specifically in the specification.

REFERENCES:
patent: 4822730 (1989-04-01), Furutachi et al.
patent: 4882266 (1989-11-01), Kawagishi et al.
patent: 5192652 (1993-03-01), Kajiwara et al.
patent: 5234805 (1993-08-01), Tang et al.

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