Process for the production of a lithographic printing plate through selective transfer

Abstract

A process for the production of a lithographic printing plate is described, in which a photosensitive material comprising a substrate suitable for lithographic printing, a hydrophilic intermediate layer, a photopolymerizable layer which changes its adhesion to the hydrophilic layer and/or to the cover sheet on exposure to light and a transparent cover sheet provided with an exposure mask which is non-transparent to actinic light is exposed to actinic light through the exposure mask, and the photopolymerizable layer is developed to give the image by peeling off the cover sheet from the substrate. The process is carried out in all stages without the use of chemicals and gives printing plates having good oleophilic properties and a long press life.

Dependencies are inferred from the claim text.