Photographic elements containing 2-equivalent pyrazolone magenta

Details Photographic elements containing 2-equivalent pyrazolone magenta Photographic elements containing 2-equivalent pyrazolone magenta

1994-12-22

1996-01-16

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430555, G03C 7392, G03C 738

Patent

active

054846960

ABSTRACT:
A silver halide photographic element having a light sensitive silver halide which layer also contains a 2-equivalent pyrazolone magenta coupler, a compound of formula (S) below, and a hydroquinone compound of formula (R) below: ##STR1## wherein: R.sub.1 is an alkyl group; and R.sub.2, R.sub.3 and R.sub.4 are independently an alkyl group or H.
The presence of the compound (S) when used with the two-equivalent pyrazolone magenta coupler and compound (R), can result in low magenta dye fade, increased wavelength of maximum absorption of the magenta dye and increased magenta dye bandwidth.

REFERENCES:
patent: 4994360 (1991-02-01), Yoshimoto et al.
patent: 5017465 (1991-05-01), Nishijima
patent: 5049482 (1991-09-01), Nishijima et al.
patent: 5145766 (1992-09-01), Leppard et al.
patent: 5236819 (1993-08-01), Kakokura et al.
patent: 5248586 (1993-09-01), Nagaoka et al.
patent: 5362615 (1994-11-01), Hagemann et al.

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