另一个想法是喷雾光泽，尤其是如果您想使用的金属颜色。
Another idea is to spray gloss them, especially if you want to use a metallic color.
通过在其他制作玻璃的原料中添加金属化合物，你可以得到特定的颜色。
You got specific colors by adding metallic compounds to the other glass making ingredients.
另一种说法是，这种颜色可能与冰中含有的大量金属化合物有关，包括铜和铁。
Another suggestion is that the color might be related to ice with high levels of metallic compounds, including copper and iron.
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