| 摘要 |
In the present invention, disclosed is a support for a printing plate material possessing an aluminum plate having been subjected to at least a surface-roughening treatment and an anodizing treatment, wherein the support has a roughened surface having a center-line average roughness Ra of from 0.25 mum to 0.50 mum, and a skewness Rsk of from -0.8 to 0, and an objective is to provide a support for a printing plate material exhibiting excellent resistance to blanket contamination with no deterioration of printing ability, and also to provide a printing plate material exhibiting excellent resistance to blanket contamination, even though the support is employed for an on-press development type printing plate material.
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