| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithographic printing original plate in which writing with an infrared laser is possible with high sensitivity, and which has improved resistance to adhesion of a photosensitive layer side surface of the lithographic printing original plate to a support side surface of an adjacent lithographic printing original plate when the original plates are stacked. <P>SOLUTION: The lithographic printing original plate is obtained by sequentially stacking on a support a photosensitive layer containing an infrared absorbent, a polymerization initiator, a polymerizable compound and a binder polymer having a repeating unit represented by formula (i), and a protective layer containing an inorganic layered compound. In the formula (i), R<SP>1</SP>represents H or methyl; R<SP>2</SP>represents a linking group including two or more atoms selected from the group consisting of C, H, O, N and S, wherein the number of atoms is 2-82; A represents O or -NR<SP>3</SP>-; R<SP>3</SP>represents H or a 1-10C monovalent hydrocarbon group; and n represents an integer of 1-5. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
