| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for cutting a lithographic printing plate material which has no defect on a lithographic printing plate after slitting, is safe in handling properties, and is excellent in printing performance, and to provide a printing method. <P>SOLUTION: In the method for cutting the lithographic printing plate material which has a hydrophilic layer comprising at least particles on a plastic film substrate and provides successively an image forming layer, the method for cutting the lithographic printing plate original plate is characterized in that when a continuous belt-like plastic film substrate of the lithographic printing plate material is slitted into a specified size by using a disc-like upper blade and a drum-like lower blade, when the environmental humidity for slitting is A% RH, 30≤A≤55, and when the drum-like lower blade has a shape radius of the drum-like lower blade short part for slitting with the disc-like upper blade of R mm, 1≤R≤6. <P>COPYRIGHT: (C)2007,JPO&INPIT |
