High contrast photographic element including an aryl sulfonamidophenyl hydrazide containing both thio and ethyleneoxy groups
AssigneeEastman Kodak Company
InventorsHarold I. Machonkin, Donald L. Kerr
Life of this patent
Estimating the term…
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 R is a monovalent group comprised of at least three repeating ethyleneoxy units, m is 1 to 6, Y is a divalent aromatic radical, and R.sup.1 is hydrogen or a blocking group.
Claims8
A silver halide photographic element adapted to form a high contrast image upon development with an aqueous alkaline developing solution, said element including at least one layer comprising, as a nucleating agent, an aryl sulfonamidophenyl hydrazide of the formula:
- ##STR19## where R is a monovalent group comprised of at least three repeating ethyleneoxy units, m is 1 to 6, Y is a divalent aromatic radical, and R.sup.1 is hydrogen or a blocking group.
Dependencies are inferred from the claim text.