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<p>[QUOTE=&quot;SuperDave, post: 2287882, member: 1892&quot;]Acetone can affect copper, but you have to help it by using it in bright light and high humidity, and you need to wait a bit for the reaction to develop enough acid to attack the coin. Under normal usage, you&#039;ll never approach that condition. Obviously caution for the coin is the highest priority when we contemplate a conservation, but I don&#039;t consider this potential reaction to be an impediment. I simply don&#039;t allow the conditions for it to exist, which is in harmony with normal workflow anyway.[/QUOTE]</p><p><br /></p>

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