Printing plate for lithography and method of making same

Details Printing plate for lithography and method of making same Printing plate for lithography and method of making same

B - Operations, Transporting

41

C

101/119

B41C 1/10 (2006.01) G03G 5/082 (2006.01) G03G 13/28 (2006.01)

Patent

CA 1131990

ABSTRACT A sheet member for making a printing plate for lithography and the resulting printing plate which comprises a substrate of sheet metal having sufficient flexibility to enable attachment of the same to a printing press roller, the plate having an r.f. bias sputtered coating of a photoconductive material which has a high photonic quantum efficiency, that is microcrystalline, wholly inorganic, flexible and capable of being imaged by electrostatic technique which includes charging, exposing and toning. The toned parts and untoned parts are rendered respectively hydrophobic and hydrophilic by suitable processes. The hydrophobic parts are oleophilic and the hydrophilic parts are oleophobic. A method of making the coated sheet metal member is described involving an r.f. bias sputtering process.

324559

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