Eastman-Kodak Company

Robert J Ott

James J Krutak

Neil F Haley

Hans G Franke

A process is disclosed for increasing the radiation sensitivity of a layer containing a polyacetylenic material while at the same time extending its radiation sensitivity towards longer wavelengths. The process comprises applying a substantially uniform electric field across the polyacetylenic containing layer and imagewise exposing the layer while the electric field is uniformly applied. Novel elements capable of recording images from two different portions of the electromagnetic spectrum are also disclosed.

Electric field sensitization of polyacetylenic materials

Electrophotosensitive materials having the structure ##STR1## is disclosed wherein R.sub.1 and R.sub.2, which may be the same or different, represent a monovalent or divalent substituted or unsubstituted 5 to 13 member heterocyclic nucleus or a substituted or unsubstituted 5 to 10 member saturated or unsaturated carbocyclic nucleus and said hetero atom is selected from the group consisting of O and N;

Electrophotosensitive materials for migration imaging processes

A method of photoconductivity attracting cationic resins in an imagewise fashion to a photoconductor, wherein the photoconductor in contact with the resin is biased positively. The resultant resin negative permits the resin coated photoconductor to be used as a master for electrographic copying.

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Rochester, NY, United States of America

Robert J Ott