| 摘要 |
Metals having a silvery-white appearance and methods of producing the same. In one embodiment, the composite material of the present invention comprises a metallic core (12, 22), a first layer (14, 24), and a second layer (16, 26). The first layer encases the eternal surfaces of the metallic core and is produced by electroplating copper or copper alloy from a first bath containing copper ions. The second layer encases the first layer and is produced by electroplating white bronze from a second bath containing copper and tin ions. The composite has a silvery-white appearance and does not include exposed nickel so that persons allergic to nickel metals are not affected by the composite. The composite material may be configured by standard processing methods to finished products such as coins, tokens, and medallions, keys, and other non-nesting articles. |
