High contrast photographic element including an aryl sulfonamido

Details High contrast photographic element including an aryl sulfonamido High contrast photographic element including an aryl sulfonamido

1990-05-24

1991-08-20

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Silver halide colloid tanning process, composition, or product

430410, 430598, G03C 106

Patent

active

050413554

ABSTRACT:
Silver halide photographic elements which are capable of high contrast development having incorporated therein, as a nucleating agent, an aryl sulfonamidophenyl hydrazide of the formula: ##STR1## where each R is a monovalent group comprised of at least three repeating ethyleneoxy units, n is 1 to 3, and R.sup.1 is hydrogen or a blocking group.

REFERENCES:
patent: 4681836 (1987-07-01), Inoue et al.
patent: 4824774 (1989-04-01), Inoue et al.
patent: 4912016 (1990-03-01), Machonkin et al.
patent: 4933273 (1990-06-01), Gilman, Jr. et al.
patent: 4971890 (1990-11-01), Okada et al.

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