| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a positive planographic printing original plate excellent in contamination resistance, plate wear and sensitivity even when aluminum with aluminum purity of 99.4 to 95 mass% which is relatively low is used. <P>SOLUTION: The positive planographic printing original plate has the following layer and a positive image forming layer, in this order on an aluminum substrate having an aluminum content of 99.4 to 95 mass%. The layer comprises chemically bonded hydrophilic polymers having at least one kind of reactive group in reactive groups capable of forming direct chemical bonds to the aluminum support surface and reactive groups capable of forming chemical bonds through a structural component having a crosslinking structure to the support surface. <P>COPYRIGHT: (C)2008,JPO&INPIT |
