SUPPORT FOR PRINTING PLATE MATERIAL, AND PRINTING PLATE MATERIAL

摘要

This invention provides a support for a printing plate material, which, even when used as a support for a press development-type printing plate material, is good in blanket fouling preventive properties, and a printing plate material having good blanket fouling preventive properties. The support for a printing plate material is produced by subjecting an aluminum plate to at least surface roughening treatment and anodizing treatment and is characterized in that the center line average roughness (Ra) of the roughened surface of the support for a printing plate material is in the range of not less than 0.25 µm and not more than 0.50 µm and the skewness (Rsk) is in the range of not less than -0.8 and not more than zero (0).