E.i. Dupont De Nemours and Company

Peter Walker

Sheau-Hwa Ma

Graciela Beatriz Blanchet-Fincher

Andrew E Matthews

Waterless printing plates

A method for preparing high resolution wash-off images, preferably using ink jet printing, comprising the sequential steps of: (a) providing a non-photosensitive layer, preferably on a substrate, wherein the non-photosensitive layer comprises a polymer selected from the group consisting of acid containing polymers having at least 0.4 milliequivalents of acid functions per gram of polymer and amine containing polymers having at least 0.4 milliequivalents of amine functions per gram of polymer, (b) applying an aqueous ink imagewise to the non-photosensitive layer to form a salt of the polymer in the ink applied areas, said aqueous ink comprising an aqueous carrier medium and a salt-forming agent; and (c) washing the non-photosensitive layer with an aqueous solution to remove the imaged areas of the non-photosensitive layer.

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Hockessin, DE, United States of America

Peter Walker