| 摘要 |
PURPOSE:To apply a desired colored pattern to a surface of a glass ware containing metal oxide as a glass material, by reducing the metal oxide to form a color metal thin film and evaporating and removing a part of the metal thin film by heating with a laser beam, etc. CONSTITUTION:A cut end of a glass tube containing a metal oxide such as PbO as a part of the composition is rounded by heating with a reducing flame burner 2 using LNG, LPG or city gas as a fuel. PbO is reduced to Pb by this process to form a color metal thin film 3. The glass tube 1 is assembled with a glass part 4 and a metallic part 5 by heating and pressing. The color metal thin film 3 of the glass tube 1 is scanned with a laser beam 6 along a prescribed shape to effect the heating and evaporation of a part of the color Pb metal thin film 3 and to form a desired pattern. |
