| 摘要 |
PURPOSE:To obtain excellent image reproducibility and excellent stability with time by incorporating a specified silicon compd. by specified wt.% or more into a silicone rubber layer. CONSTITUTION:This waterless planographic printing master plate consists of at least a photosensitive layer and a silicone rubber layer formed in this order on a substrate. The silicone rubber layer contains a silicon compd. expressed by formula by >4wt.%. In formula, R1 and R2 are alkyl groups of 1-30 carbon number and R1 and R2 may be same or different. R3-R8 are alkyl groups of 1-30 carbon number or one of aryl groups of 5-30 carbon number and may be same or different. Where, n is 0-10000. Any material may be used as the substrate as far as it can endure printing, and for example, a polymer film, metal plate, paper or composite material of these are used. Further, the substrate may be coated with a primer layer to improve adhesion property and can be used as a supporting body. |
