Method for making lithographic printing plate
AssigneeMitsubishi Paper Mills Limited
InventorsShigeyoshi Suzuki, Akira Furukawa
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Abstract
This invention provides a method for making a lithographic printing plate of high resolving power and high printing endurance which comprises imagewise exposing a photoreceptor having a conductive layer and a printing sheet comprising a conductive support having thereon a dielectric non-photosensitive layer which are placed opposite to each other while applying a direct voltage between said conductive layer and said conductive support by a direct current source to form a positive electrostatic latent image on said non-photosensitive layer of the printing sheet and then subjecting the image to development and fixation.
Claims9
A method for making a lithographic printing plate which comprises placing, opposite to each other, (i) a printing sheet comprising a conductive support selected from the group consisting of a metal sheet, a metal-deposited film and a metal foil-laminated film, having thereon a dielectric non-photosensitive layer, and a photoreceptor comprising a film support having a conductive layer on which an organic photoconductive compound is provided, imagewise exposing the photoreceptor from a light transmitting side while applying a direct voltage between said conductive support and said conductive layer by a direct current source to form a positive electrostatic latent image on said non-photosensitive layer of the printing sheet and then subjecting the image to wet developing and fixation.
Dependencies are inferred from the claim text.