| 摘要 |
The decorative vitreous beads of the present invention have a hard, solid, substantially vitreous, unitary body comprised primarily of silica and having a generally spherical form, with the largest dimension being in the range between 1/8 inch to 2 inches. The body by weight comprising 35% to 70% of silica and the remaining ingredients by weight are from 65% to 30% for a total of 100% taken from the group comprising potash, soda, calcia, strontia, alumina, zinc oxide, boric oxide, zirconia, magnesia and potassium. Methods are further disclosed for making the decorative beads comprising mixing together a batch of minerals in powder state comprising by weight 35% to 70% of silica and the remaining oxides by weight from 65% to 30% for a total of 100% taken from a group comprising the oxides mentioned previously. The mixed batch is placed in the container which is inserted into a kiln.
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