| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a photosensitive lithographic printing original plate for an infrared laser excellent in balance of developability and printing durability and exhibiting good erasability. <P>SOLUTION: The lithographic printing original plate is obtained by sequentially disposing an intermediate layer containing a low molecular compound having a quaternary ammonium group and an acid anion group within the same molecule and a recording layer comprising a positive photosensitive composition containing a high molecular compound and an infrared absorbent on a support having a hydrophilic surface. A compound represented by formula (1) is preferable as such a low molecular compound, wherein R<SP>1</SP>-R<SP>3</SP>each independently represent an alkyl group; Z denotes a divalent linking group; and Y represents an acid anion group. <P>COPYRIGHT: (C)2007,JPO&INPIT |
