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<p>[QUOTE=&quot;Charlie32, post: 113723, member: 4030&quot;]An example might be a coin with PVC contamination.&nbsp; If the PVC has pitted the surface of the coin, it would be put in an NCS slab after the PVC was removed.&nbsp; If the PVC had not started to pit the surfaces, then it would be put in a NGC holder.</p><p><br /></p><p>Charlie[/QUOTE]</p><p><br /></p>

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