| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing an original plate for a negative type lithographic printing plate corresponding to an IR laser with excellent effect for preventing an edge from being contaminated. SOLUTION: The method for manufacturing the original plate for the negative type lithographic printing plate provided with a recording layer wherein an exposed part is turned to a hydrophobic region by being exposed with the IR laser, is characterized by setting a gap between an upper blade and a lower blade of a slitter for cutting to be 0-30μm when the original plate for the negative type lithographic printing plate is cut into a required size. COPYRIGHT: (C)2003,JPO
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