Green Toning On Coin? (Nickel-Brass)

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Author	Replies: 6 / Views: 1,651
RobertP Valued Member Romania 68 Posts	Posted 09/01/2017 3:11 pm Why are there a few green spots on it? It was in circulation. Can I clean it without damaging it? Report this Post to the Staff

Albert Pillar of the Community United States 1912 Posts	Posted 09/01/2017 6:01 pm If this is common but small verdigris I've had some decent results with a toothpick and some olive oil. But the results vary from reasonable to leaving a different sort of blotch in the same place. Report this Post to the Staff
RobertP Valued Member Romania 68 Posts	Posted 09/01/2017 6:31 pm If I don't have olive oil, what should I use? And do you recommend to do that cleaning? Edited by RobertP 09/01/2017 6:32 pm Report this Post to the Staff
cara Valued Member Uruguay 217 Posts	Posted 09/01/2017 7:03 pm Try cleaning it with acetone, sometimes that's enough. Report this Post to the Staff
RobertP Valued Member Romania 68 Posts	Posted 09/01/2017 7:21 pm Ok, I will try with acetone. Thanks Report this Post to the Staff
RobertP Valued Member Romania 68 Posts	Posted 09/02/2017 05:37 am Didn't work Report this Post to the Staff
UltraRant Pillar of the Community Norway 1358 Posts	Posted 09/03/2017 05:27 am The coin is made of nickel-brass, with brass being copper and zinc. I assume it's the copper that caused the spots. Try putting it in a bath of acetone for about one hour, make sure that the green spots are in direct contact with the acetone. Then clean off the coin using distilled water. Pat it dry (don't rub). Alternatively, try putting it in a bath of distilled water with some baking soda dissolved in it for about one hour. Then clean with distilled water and pat it dry (don't rub). I hope this helps! Report this Post to the Staff
	Replies: 6 / Views: 1,651

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