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AssigneeEastman Kodak Company
InventorsIan M. Newington, Mark A. Harris, Judith L. Fleissig, Kristine B. Lawrence
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A method for the preparation of a lithographic printing plate comprises forming an oleophilic image on the surface of a hydrophilic support by depositing, preferably by ink-jetting, the desired image on the surface using an aqueous emulsion of an organic film-forming polymer which has been prepared by emulsion polymerization, whereby the polymer adheres to the surface of the printing plate forming an oleophilic film. The polymer preferably has functional groups such as sulphonate that bind the polymer to the hydrophilic surface. Preferably the polymer has a glass transition temperature of not greater than about 105° C. and where the glass transition temperature is above 50° C. the polymer, after deposition on the plate, is preferably subjected to a heat treatment to assist in film formation.
A method for the preparation of a lithographic printing plate which method comprises forming an oleophilic image on the surface of a hydrophilic support by depositing the desired image on the surface using an aqueous emulsion of an organic polymer prepared by emulsion polymerisation wherein the polymer is film-forming and has functional groups that bind the polymer to the surface of the hydrophilic support of the printing plate forming an olephilic film.
A printing plate comprising a hydrophilic support having deposited thereon an image comprising an olephilic film of polymer prepared by emulsion polymerisation and which has coalesced from an aqueous polymer emulsion, wherein the polymer contains functional groups that bind the polymer to the surface of the hydrophilic support of the printing plate.
Dependencies are inferred from the claim text.