| 摘要 |
PURPOSE: To improve the thermal shock resistance, weatherability and frictional resistance of a stamp by a method wherein the pasting of a label is made unnecessary at the marking to a urea resin molded article. CONSTITUTION: A molded article 4 is obtained by molding material containing urea resin, silicon and pigment by direct pressure molding method. Laser light source 1 radiates laser beams, which are emitted from carbon dioxide gas laser and have the energy density of 255kW/cm<2> or less, onto the surface of the molded article 4 so as to apply a stamp 6. |
