| 摘要 |
PROBLEM TO BE SOLVED: To provide a damping-waterless photosensitive planographic printing plate for heat mode writing-type direct plate making with which direct recording of digital data of a computer, etc., by using a solid-state laser and semiconductor laser (heat mode) having a light emission region from near IR to IR is possible and which is usable for both of a positive type and negative type. SOLUTION: The photosensitive layer of the damping-waterless photosensitive planographic printing plate constituted by laminating a photosensitive layer and silicone rubber layer in this order on a base contains at least (a) a compd. contg. at least two pieces of ether groups expressed by formula (R<1> )(R<2> )C=(R<3> )- O-, (b) a linear polymer compd., (C) an IR absorbent and (d) an acid precursor. In the formula, R<1> , R<2> , R<3> respectively independently denote hydrogen, alkyl group or aryl group. The two among these groups may be bound to form a satd. or olefinic unsatd. ring. |
