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Purifying gold
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<blockquote data-quote="heavymetal" data-source="post: 5632" data-attributes="member: 202"><p>Does anyone on here know how to clean copper off gold. Some of the gold I have melted down has come up with a coating of copper and I would like to clean it off some how. I was thinking maybe an acid of some type. I have been using borax to get rid of impurities but it doesn't seem to get rid of the copper. Any help on this matter would be great.</p></blockquote><p></p>
[QUOTE="heavymetal, post: 5632, member: 202"] Does anyone on here know how to clean copper off gold. Some of the gold I have melted down has come up with a coating of copper and I would like to clean it off some how. I was thinking maybe an acid of some type. I have been using borax to get rid of impurities but it doesn't seem to get rid of the copper. Any help on this matter would be great. [/QUOTE]
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Purifying gold
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