Eastman-kodak Company

Jean E Jones

William E Yoerger

Lawrence E Contois

George L Fletcher, Jr

Donald H Wadsworth

Electrostatic contrast control in p-type electrophotographic elements is achieved by incorporating into the photoconductive layer a hole trapping agent such as a tetraphenylboron anion, bromide ion, iodide ion, oxidizable dye such as a carbocyanine and dicarbocyanine, merocarbocyanine and merodicarbocyanine, styryl, oxonol, hemioxonol, or hemicyanine. Usable hole trapping agents have an oxidation potential in a neutral solution of at least 0.1 volts less than that of the photoconductor in the photoconductive layer.

Additives for contrast control in organic photoconductor compositions

A photographic vesicular imaging composition, element and process are provided using a binder having a suitable gas impermeability, a cyclopropenone vesiculating agent, and optionally a spectral sensitizing compound.

Cyclopropenone vesicular imaging composition, element and process

This invention relates to supersensitizing dye combinations useful for organic photoconductive compositions comprising: at least one cyanine, merocyanine, rhodacyanine or styryl spectral sensitizing dye which

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Rochester, NY, United States of America

Jean E Jones