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18K金的比重比純金小嗎？

Nov 28th 2013, 09:12

K金為黃金與其他金屬合成的合金

>>一般9999純金又稱24K金
>>18K金即：18K/24K=75%的黃金合金
由於每家珠寶廠的K金合金部分不一定會使用相同的金屬
(一般多為鈀、銀、銅、銀、鎳、鋅等...)

所以無法很肯定的確定 18K金的比重
但是可以大概的計算出來。

◎黃金比重(24K)=19.3
◎18K金比重小於黃金，因為 18K金比重=(19.3*75%+合金1的比重*比例+合金2的比重*比例)=(14.475+合金1的比重*比例+合金2的比重*比例)

參考資料 http://tw.myblog.yahoo.com/p0955837079/article?mid=1&prev=-2&next=-1&page=1&sc=1

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