| 摘要 |
<p>A method of producing a ternary alloy of silver, copper and germanium, or a quaternary alloy of silver, copper, zinc and germanium, is provided, comprising casting a molten mixture of silver, copper, germanium, and optionally zinc, to form a solidified alloy, and processing and annealing the sheet to reduce its thickness and re-crystallise grains in the alloy. The annealing is carried out under a selectively oxidising atmosphere, preferably an atmosphere comprising nitrogen, hydrogen and moisture, to afford firestain resistance and improved tarnish resistance to the alloy.</p> |
