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<p>[QUOTE=&quot;BadThad, post: 640378, member: 17261&quot;]I&#039;ve said that for years. AT comes in a lot of different flavors, from 10 seconds of heat to a year in a sulfide envelope. </p><p>&nbsp;</p><p>I rinse all my coins with acetone before storage in an Airtite to remove any traces of water. Sometimes I get a little surprise! Some of the poorly AT&#039;d coins I&#039;ve bought had the AT removed with acetone and/or xylene. LOL To me, those are the TRUE AT coins. I&#039;ve never seen natual toning on copper be effected by solvents.[/QUOTE]</p><p><br /></p>

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