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<p>[QUOTE=&quot;GDJMSP, post: 1301186, member: 112&quot;]Yeah maybe. But what about all the cases where the coin tones in the slab all by itself, quite naturally ? And there are far, far more of those than there are cases where a coin doctor intentionally toned a coin in the slab.</p><p><br /></p><p>And if you think it doesn&#039;t happen often that a coin tones in the slab all by itself then you need to think again. Just take a look sometime at how many cents there are in slabs labeled as Red, that are not Red.</p><p><br /></p><p><br /></p><p><br /></p><p>Before you could do that you&#039;d have to come up with an airtight slab. And that&#039;s not gonna happen because no matter how well you seal the edges of the slabs, the plastic itself is air permeable. Yes, air molecules can go right through the face of the slab. And to my knowledge there is no plastic that is not air permeable. NGC even tried, and marketed, what they called an airtight slab for a while. They soon gave up because it didn&#039;t work.[/QUOTE]</p><p><br /></p>

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