BLOCK COPY SHEET FOR LITHOGRAPHY

摘要

PROBLEM TO BE SOLVED: To obtain a block copy sheet for a lithographic printing plate which can surely prevent plate elongation and positional slippage of the printing plate on a plate cylinder of a press and which makes the plate having a substrate of a material other than metal applicable also to multicolor printing and printing of a large number of sheets and satisfies the printing performance and durability under the conditions of repeated use. SOLUTION: In the block copy sheet for lithography having an indented shape at least in one surface of the substrate of which the initial modulus is 350 kgf/mm2 or above, the indented shape is formed by an indented surface constituted of particles of particle diameters 1-100μm and an integrated resin and by an overcoat layer provided thereon.