| 摘要 |
PURPOSE:To improve the productivity by a method wherein an engraved part is formed by laser process on the surface of a rubber stamp material which contains 10-150 pts.wt. of hydrated silicic acid and anhydrous silicic to 100 pts.wt. of a raw material rubber, and is treated by an alkyl solution. CONSTITUTION:A rubber stamp material contains 10-150 pts.wt. of hydrated silicic acid and anhydrous silicic to 100 pts.wt. of a raw material rubber. In order to form an engraved part i.e., a printing surface, a draft of a printing pattern is made by phototypesetting, and then, the printing pattern is data- processed by scanning, image scanner, and a pattern is engraved by direct radiation of a laser beam on the rubber stamp material, based on the data. The operation is processed by a computer. The rubber stamp material after the laser process is immersed in an alkali solution to be washed, and then, the rubber stamp material is washed by water, and after a neutralizing treatment, the rubber stamp material is washed by water again. By the effects of the hydrated silicic acid and anhydrous silicic which are mixed in the rubber stamp material and the alkali solution, the stickness of a printed image is reduced, and the butadiene odor is eliminated. |
