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US 5,834,169 AGranted
Method of developing a photographic product with incorporated developer by surface application
AssigneeEastman Kodak Company
InventorFrancoise M. Thomas
Life of this patent
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Abstract
The present invention concerns a novel method for developing silver halide photographic products. This method involves processing photographic products that have an incorporated developing agent, and a nucleation agent, by surface application of an activator solution. This method intended for processing graphic arts films having high contrast.
Claims19
A method for processing an exposed silver halide photographic product comprising a support having thereon a silver halide emulsion layer, said method comprising applying to said photographic product, a layer of an activator, wherein
- A. said photographic product comprises:
- (1) a hydrazine nucleation agent,
- (2) an incorporated amino booster, and
- (3) a developing agent for silver halides capable, in its oxidized form, of oxidizing hydrazine, and
- B. said activator being a homogeneous aqueous solution of (a) an alkanolamine in a quantity greater than or equal to 0.6 mol/l, (b) a quaternary ammonium salt, (c) at least one high pH resistant wetting agent miscible in said activator and (d) a nitroindazole anti-fog compound.
2 more elements
Dependencies are inferred from the claim text.