| 摘要 |
PURPOSE:To obtain the printing plate which is of good friction resistance and ink repellency and superior printing resistance by containing the organic polysiloxane having vinyl groups and bisazide compound in silicone rubber layer. CONSTITUTION:A photosensitive layer of 0.5 to 10mu is provided on a film such as of polypropylene or the like. The mixture comprising adding crosslinking agents, sentizers (1-nitropylene, etc.) to 0 to 95wt% of silicone rubber of several thousands to several hundred thousands in molecular weight based on the weight of the entire component of the rubber layer, 2 to 95% of organic polysiloxane having vinyl groups and 0.1 to 30wt% of bisazide compound is coated and dried by way of primer on the separately chemically formed Al plate, whereby the silicone rubber layer of 0.5 to 100mu is formed. Next, the foregoing polypropylene film and Al plate are affixed together. After the exposure, the polypropylene film is separated and is then developed, whereby the original lithographic plate not requiring wetting water is obtained. |
