The article brings a discussion to the technology of melting high impurity blackcopper with a tilting furnace. It is a good attempt of new adopted smelting technology.
对倾动炉处理高杂质黑铜的冶炼技术进行了多方面的论述，对新的冶炼操作方式进行有益的尝试。
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In several reactions a colour change indicates the formation of new products. For example, green copper carbonate reacts, when heated, to form blackcopper oxide and carbon dioxide gas.
Depending on individual habitats, which extend from the tropical forests of Costa Rica to Brazil, their coloring can be yellow, gold, copper, red, green, blue, or black.