ORIGINAL PLATE FOR KEY PLATE AND INTEGRATED BODY OF ORIGINAL PLATE FOR KEY PLATE

摘要

PROBLEM TO BE SOLVED: To provide an original plate for a key plate which has the slidability of interleaving paper similar to that of a photopolymerizable planographic printing plate and the conveyability of the plate, can be made by the same plate making process system as that for the photopolymerizable planographic printing plate, permits safe plate making by surely detecting the presence or absence of the interleaving paper, and has high productivity and an integrated body thereof.;SOLUTION: The original plate for the key plate has a non-photosensitive layer containing a binder polymer developable with water or at least an alkali on a metallic support having a hydrophilic surface. The original plate for the key plate having an overcoat layer thereon and the integrated body of the original plate for the key plate formed by laminating a plurality of the original plates for the key plate through the interleaving paper are obtained. The plate making by the same plate making process system as that for the photopolymerizable planographic printing plate is made possible by using the original plate for the key plate. Also, the presence or absence of the interleaving paper on the original plates for the key plate can be safely identified and conveyance can be surely performed in the plate making process.;COPYRIGHT: (C)2004,JPO