Photographic elements containing magenta couplers and process fo

Details Photographic elements containing magenta couplers and process fo Photographic elements containing magenta couplers and process fo

1993-05-24

1995-05-02

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Using identified radiation sensitive composition in the...

430555, G03C 7384

Patent

active

054118417

ABSTRACT:
Improved hue, speed of dye formation and reduced staining are provided by a photographic element comprising a light-sensitive silver halide layer having associated therewith a 1-phenyl-3-anilino-pyrazolo-5-one coupler comprising a ballasted parent and a coupling-off group and containing substituents on the 1-phenyl and 3-anilino rings of the parent having Hammett sigma values which together sum to at least 1.1, the coupler further having at the 4-position of the pyrazolone ring a coupling-off group comprising a phenylthio group containing a carbonamido substituent in the position para to the sulfur on the phenylthio ring with the substituents on the phenylthio ring selected such that the calculated log P of the thiophenol corresponding to the coupling-off group is at least 4. ##STR1##

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patent: 4994359 (1991-02-01), Moriyuki et al.
patent: 5250407 (1993-10-01), Kase

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