More Advice on Coin Cleaning - NumisMaster
Jul 17
In my last column, I talked about coin cleaning with abrasive methods, which should almost never be employed, and with coin dips. If you follow the directions on the container, the acid-thiourea dip method will produce satisfactory results on high-grade coins, as long as you don’t do it repeatedly on the same coin and you take care to neutralize the action of the solution.
I should note that you should never use this method on a copper/bronze coin, as the coin will turn a pink color that gives it a decidedly cleaned appearance.
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Article Tags: Cleaning Coins, NumisMaster.
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