| 摘要 |
PROBLEM TO BE SOLVED: To realize color stripes of warm color system, the miniaturization of a coloring material supply device and the shortening of production loss time in a preparation step and a post treatment step in the production of glass product with a color stripe pattern. SOLUTION: Low melting point glass frit as coloring material is charged through a pipe inserted into glass in a spout and is fused, thereby, a gob with color stripes is prepared and the glass product with a color stripe pattern is formed from the gob. The glass frit is charged into the spout, the time while the frit is fused is short, therefore, the color of warm color system is hardly changed and the miniaturization of the coloring material supply device and the shortening of production loss time in the preparation step and the post treatment step can be realized.
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