LITHOGRAPHIC ORIGINAL PLATE WITHOUT DAMPENING WATER

摘要

PROBLEM TO BE SOLVED: To realize a lithographic original plate having excellent image reproducibility capable of writing with laser by layering an addition silicone rubber layer having an organohydrogen polysiloxanc on a layer having specified physical property on a support body. SOLUTION: On a support body, a layer whose adhesion to a silicone rubber layer deteriorates by converting laser beam into heat and an addition silicone rubber layer which contains 10-20wt.% of organohydrogen polysiloxane based on a solid content are layered in the described order so as to make a lithographic original plate without dampening water. Accordingly, a lithographic original plate without water capable of heat mode recording with laser beam and having excellent image reproducibility and flaw resistance can be produced.