Silver halide solution physical developing solution
AssigneeEastman Kodak Company
InventorsMichael Phillip Youngblood, Thomas Edward Lowe
Life of this patent
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Abstract
A black-and-white silver halide developing solution and a silver halide solution physical developing solution are used in sequence to provide electrically-conductive film elements from conductive film element precursors that contain photosensitive silver halide emulsions on one or both supporting sides of a transparent substrate. The two developing solutions have unique combinations of developing agents and other essential components to provide complete development of imagewise exposed silver halide to form highly electrically-conductive silver metal in predetermined patterns.
Claims10
A silver halide solution physical developing solution comprising:
- (a) a primary developing agent that is a hydroquinone or ascorbic acid or derivative of either, in an amount of at least 0.01 mol/l and up to and including 1 mol/l, and
- (c) a silver halide dissolution catalyst in an amount of at least 0.001 mol/l and up to and including 0.1 mol/l, and
- the silver halide solution physical developing solution containing substantially no (b) catalytic developing agent.
Dependencies are inferred from the claim text.