| 摘要 |
PURPOSE: To obtain a precious-metal-containing material for articles of jewelry, having excellent corrosion resistance and low specific gravity and minimal in toxicity, by mixing a powder of precious metal or precious-metal-containing alloy, a thermosetting resin, and a fine-grained inorganic filler in a specific proportion. CONSTITUTION: A mixture is prepared by uniformly mixing 33-99 wt.% of fine powder of 1-100μm of precious metals, such as Au, Ag, and Pt, or alloy containing these precious metals in amounts of >=60 wt.% and having the balance base metal free from toxicity, 1-67 wt.% of curable organic thermosetting casting resin such as two-component epoxy resin, and 0-10 wt.% of fine-grained inorganic filler of silicon oxide. A mold corresponding to an article of jewelry or a cavity of a hollow article of jewelry is filled with this mixture, followed by hardening. By this method, a precious metal type article of jewelry having stable size and free from toxicity can be obtained. |
