制作铜雕的铜质一般常用的有三种：紫铜、黄铜、青铜。
There are three kinds of copper commonly used in making bronze carvings: bronze, brass and bronze.
1、紫铜：系指纯铜，又称红铜。密度是8.9(g/cm3)。
1. Copper: refers to pure copper, also known as red copper. The density is 8.9 (g/cm3).
2、黄铜：系指铜与锌为基础的合金，密度是8.5-8.8(g/cm3)。
2. Brass: refers to an alloy based on copper and zinc with a density of 8.5-8.8 (g/cm3).
3、青铜：系指除铜锌、铜镍合金以外的铜基合金，密度是7.5-8.9(g/cm3)。
3. Bronze: refers to copper-based alloys other than copper-zinc and copper-nickel alloys, with a density of 7.5-8.9 (g/cm3).falanp.89ix.comjinggaig.89ix.comfenxiyii.89ix.comxiangrongji.37ix.com.cn tuomoji.37ix.com.cnseduji.89ix.com
铸造铜雕人物雕塑用黄铜比青铜好，紫铜最好。
Brass is better than bronze for casting bronze sculptures and bronze is the best.