洋白（洋銀、アルパカとも呼ばれる）は銅とニッケルと亜鉛の合金で、名前とは裏腹に銀は含まれていない。銀白色の外観を持ち、硬くて摩耗に強く、耐食性に優れています。洋銀は硬貨に使われることもありますが、貴金属のコストをかけずに外観と耐久性が評価されるトークンやメダルによく使われます。
これは自動翻訳です。元のテキスト:
Nickel silver (also called German silver or alpaca) is a copper-nickel-zinc alloy, containing no silver despite the name. It has a silvery-white appearance, is hard and wear-resistant, and offers good corrosion resistance. Nickel silver has been used for coins in some contexts, but is more common for tokens and medals, where its appearance and durability are valued without the cost of precious metal.
![5 centimes - Taverne du Lion d'argent - L.Roux - Lyon [69] - obverse](https://en.numista.com/catalogue/photos/france/62ae0f21e60758.57361085-180.jpg)
