| 摘要 |
PURPOSE:To obtain glass for a wrist watch, which is partially colored, by impregnating a resin ink part with a coloring agent and coloring it. CONSTITUTION:Printing 2 is performed to a part of the reverse side of inorganic cover glass 1 by acryl compound resin ink of an ultraviolet ray curing type. An acryl compound resin film is formed on a part of the reverse side of the cover glass 1 by irradiating ultraviolet rays and curing said resin. A blue coloring agent is added to methanol by about 1.0wt%, is heated to about 60 deg.C, and the cover glass 1 is immersed. As for the cover glass 1, only the printed part 2 is colored to light blue. The coloring density can be controlled freely by changing added density of the coloring agent, a temperature of methanol and an immersion time. Also, coloring to various color tones can be executed by changing a kind of the coloring agent. |
