Ionic liquids as addenda in photothermographic systems
AssigneeEastman Kodak Company
InventorsLeif P. Olson, James H. Reynolds
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Abstract
This invention involves use of ionic liquids as addenda in a photothermographic system. The presence of an ionic liquid was found to increase image density. A preferred ionic liquid comprises an organic cation associated with a suitable anion, which ionic liquid melts at a temperature of 50° C. or less.
Claims16
A photothermographic light-sensitive element comprising a support and, on said support, at least three light-sensitive color imaging layers which have their individual sensitivities in different wavelength regions, each of said imaging layers comprising a light-sensitive silver-halide emulsion, an organic silver salt, a binder, a dye-providing coupler, and a blocked developer, the dyes formed from the dye-providing couplers in the layers being different in hue, therefore capable of forming at least three dye images of different visible or infra-red colors, wherein the element further comprises an ionic liquid material in association with at least one imaging layer.
An emulsion for use in a silver halide color or monochrome photothermographic light-sensitive element, said emulsion comprising silver-halide, organic silver salt, an incorporated developing agent or precursor thereof, a dye-forming coupler, and an ionic liquid material.
Dependencies are inferred from the claim text.