Message:

<p>[QUOTE=&quot;Tom B, post: 1639445, member: 11854&quot;]The slabs are not airtight, which means that if they are stored in an environment that would promote toning that the coins can start, or continue, to tone.&nbsp; Also, if something is on the surface of a coin that might accelerate the toning process and it is still on the coin when it is slabbed then the coin may tone faster than it otherwise would.&nbsp; However, if coins are in slabs and kept away from an environment that encourages toning then they should either not tone at all or should continue to tone very slowly.[/QUOTE]</p><p><br /></p>

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