| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a photosensitive lithographic printing plate material suitable for exposure with laser light whose emission wavelength is within the range of 350-450 nm, excellent in sensitivity and long-term storage stability, and excellent also in suitability to development, and to provide a plate making method. <P>SOLUTION: The photosensitive lithographic printing plate material is obtained by disposing on a support a photosensitive layer containing a spectral sensitizer, a photopolymerization initiator, a polymerizable compound and a polymeric binder, wherein the spectral sensitizer is a compound having a chemical structure represented by formula (1) wherein R<SP>1</SP>represents H, a 1-6C alkyl or aryl; R<SP>2</SP>represents a 2-30C alkyl, alkenyl or aryl which is a substituent different from R<SP>1</SP>; and L<SP>1</SP>represents a divalent linking group selected from the group A of linking groups (a)-(n). <P>COPYRIGHT: (C)2006,JPO&NCIPI |
