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How to build a electrolytic gold refining machine

Mar 06, 2008 It's best to use electrolytic refining if you want a higher purity! Warning: Nitric acid is very corrosive and dangerous, its the main ingredient in nitroglycerine, used to make bomb! To refine gold you have to lower the percentage of gold by using silver or copper, theoretically to 25%. meaning the gold content of the metal is 25%

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