如果高含銀量的硬幣長期放置在地下，或者遭受到其他不利因素的影響，在其表面會生成很厚的一層氧化物，這時應將硬幣在氨水溶液中浸泡1小時(成份：水90%和濃氨水10%)。如果沒有氨水溶液，也可以調製碳酸鈉溶液(將30克食用純鹼溶解於100克水中)代替。將硬幣置於溶液中幾個小時，直至氧化物完全溶解。
If a coin with high silver content is kept underground for a long time or is affected by other adverse factors, a thick layer of oxide will be formed on its surface. The coin should be soaked in an ammonia solution for one hour (90% water and 10% concentrated ammonia). If there is no ammonia solution, the sodium carbonate solution (30 grams of edible soda dissolved in 100 grams of water) can be prepared instead. Place the coins in the solution for several hours until the oxide is completely dissolved.
如果高含銀量的銀幣只是受到輕微氧化，那麼最好用氨水溶液加碳酸鈉溶液和牙膏調製成糊狀來清洗。這種糊狀物用手摸起來應該柔軟並且沒有細小的硬顆粒。方法是用手指或者用柔軟的刷子將其輕輕塗在硬幣表面，待氧化物溶解後，用清水沖洗乾淨即可。
If silver coins with high silver content are only slightly oxidized, it is best to clean them with ammonia solution, sodium carbonate solution and toothpaste in a paste. This paste should be soft with hands and has no small hard particles. The method is to use a finger or a soft brush to gently apply it on the surface of the coin, after the oxide dissolved, rinse it off with clean water.
以銅作為中間合金的低含銀量銀幣在嚴重氧化時會變成綠色。清洗這種硬幣，最好用5%的稀硫酸溶液清洗。當綠鏽層溶解並退去後，再採用清洗高含銀量銀幣的方法進行清洗。但如果銀幣表面的氧化物很均勻，就在可不必清洗掉。
Silver with low silver content as an intermediate alloy will turn green when severely oxidized. Cleaning this coin is best cleaned with 5% diluted sulfuric acid solution. When the green rust layer is dissolved and retreated, the silver content is cleaned by cleaning silver. But if the oxide on the surface of the silver coin is very uniform, it is not necessary to wash it.
硬幣一般不必清洗，特別是不能用普通橡皮或市面上出售的玻璃纖維擦拭棒擦拭，這樣會劃傷硬幣表面。
Coins generally do not need to be cleaned, especially if they can not be wiped with plain rubber or with glass fiber swab sticks sold on the market, which will scratch the surface of the coin.
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