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<p>[QUOTE=&quot;rzage, post: 395824, member: 14070&quot;]In W.Whites book he recomends putting a few new pennies in a ziplock bag , only for silver coins already in a high grade slab or aftermarket holder , not for copper coins , since copper will react with the sulfides in the air 1st , I really don,t see how this can be of much help , actually how much sulfide can a few pennies actually &quot;take out&quot; .</p><p>The reason this may seem to work is that the coin is already in a high grade holder , ie nearly airtite , and the siticants , moisture collectors , in the bag .</p><p>rzage[/QUOTE]</p><p><br /></p>

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