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· Reverse gold electroplating - Know More. Jan 03, 2013 0183 32 I was using water, salt, I used the same 6 volts plus two copper wir made a solution of vinegar and salt placed the gold plated medallion in the solution ....Abstract. THE problem presented by the necessity of refining gold was one for which a solution was sought at least as early as the time, about B.C. 700, when coins were first manufactured …
