Combinations of purine-releasing pyrazolone DIR couplers and pyr

Details Combinations of purine-releasing pyrazolone DIR couplers and pyr Combinations of purine-releasing pyrazolone DIR couplers and pyr

1997-12-19

1999-11-23

Letscher, Geraldine

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430549, 430555, 430558, 430957, G03C 108, G03C 726, G03C 732

Patent

active

059897988

ABSTRACT:
A photographic element comprises: (a) a support; and (b) at least one silver halide emulsion layer; wherein said emulsion layer contains (c) at least one magenta dye-forming pyrazolone DIR coupler of structure I; and (d) at least one magenta dye-forming imaging coupler of structure II, structure IIIa or structure IIIb, below: ##STR1## wherein the substituents are as defined in the specification.

REFERENCES:
patent: 3933500 (1976-01-01), Shiba et al.
patent: 5091293 (1992-02-01), Nozawa et al.

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