LITHOGRAPHIC PRINTING PLATE

摘要

PROBLEM TO BE SOLVED: To provide a lithographic printing plate which is constructed of an aluminum plate with an excellent plate wear as a support. SOLUTION: The lithographic printing plate is constructed of an aluminum plate which has a roughed surface and is desmut treated with an acid and further, is anodized as a support, or constructed of an aluminum plate with a rough and anodized surface on which the peak of an Is orbit of nitrogen is observed at a position where a chemical shift is 400±1eV by ESCA and which a peak area which is 0.5% or more of the peak area of aluminum as the support.