| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an original plate of a lithographic printing plate capable of providing the lithographic printing plate superior in printing durability by excellent development even in development in mild solution (pH=2 to 10), and to provide its making method. <P>SOLUTION: The method for making the lithographic printing plate for removing a photosensitive layer of a protection layer and a non-exposure part by rubbing a plate face by a rubbing member under the existence of a developer of pH of 2 to 10 by an automatic processing machine provided with the rubbing member after image-exposing, with a laser of 360-450 nm, the original plate of the lithographic printing plate having (A) a radical polymerization compound having an isocyanuric acid group, (B) a binder polymer having an acid number of 0.3 meq/g or less, (C) a sensitizing pigment having the maximum absorption in a wavelength region of 360-450 nm, (D) the photosensitive layer containing an initiator compound, and the protection layer on a hydrophilic support in this order. <P>COPYRIGHT: (C)2008,JPO&INPIT |
