Photographic couplers having a ballast containing a sulfone or s

Details Photographic couplers having a ballast containing a sulfone or s Photographic couplers having a ballast containing a sulfone or s

1993-10-29

1995-03-21

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Using identified radiation sensitive composition in the...

430385, 430386, 430387, 430552, 430553, 430554, 430555, G03C 734, G03C 7384

Patent

active

053994671

ABSTRACT:
Novel photographic silver halide materials contain dye-forming couplers represented by formula (I): ##STR1## wherein K is a coupler moiety based on pyrazolone, phenol, naphthol, enamine, or acylacetamide to which the ballast group is attached, are useful in photographic materials and processes. The containing the couplers exhibit increased coupling activity, and provide formation of dyes having improved maximum magenta image dye density, contrast, and development speed.

REFERENCES:
patent: 3615506 (1971-10-01), Abbott et al.
patent: 4286053 (1981-08-01), Ishikawa et al.

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