| 摘要 |
PROBLEM TO BE SOLVED: To obtain a waterless original plate having high sensitivity and capable of laser beam recording by successively laminating a primer layer contg. fine hollow polymer particles, an adhesiveness reducing layer and a silicone rubber layer on a substrate. SOLUTION: A primer layer contg. fine hollow polymer particles, an adhesiveness reducing layer and a silicone rubber layer are successively laminated on a substrate. The adhesiveness reducing layer is a photothermic conversion layer and converts laser light into heat and reduces the adhesiveness of the silicone rubber layer to the primer layer by the heat at the irradiated part. Since the fine hollow polymer particles are used in the primer layer, laser light reflectance is increased, laser light is effectively used and energy loss due to the diffusion of heat generated in the photothermic conversion layer by exposure to laser light into the substrate is reduced. The fine hollow polymer particles are fine particles having internal voids and are liable to reflect light at the interface between the polymer and air by the difference in refractive index between them. |
