| 摘要 |
PURPOSE:To obtain a dry direct printing type lithographic plate not deteriorating ink repellency and superior in printing performance, by forming relief image lines made of a photosetting resin, and an ink-repellent nonimage part made of organopolysiloxane on a base. CONSTITUTION:A first layer made of a first photosetting resin, and a second layer made of a second photosetting resin different in solubility in a solvent after photosetting are successively formed on the surface of a base. The first and the second layers are patternwise exposed to light, and only the unexposed part is dissolved off to give the exposed part of the first layer remaining as the relief image lines and the part of the second releasable layer remaining on said relief image lines. All the surface is coated with a layer made of organopolysiloxane, and developed with a solvent dissolving the releasable layer, removing the releasable layer together with said siloxane polymer located just on the releasable layer, thus the intended dry direct printing type lithographic plate is obtained. |
