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<p>[QUOTE=&quot;SuperDave, post: 2576288, member: 1892&quot;]That&#039;s interesting to know. I kind of suspected that we&#039;d see some sort of imperfect sealing if we got down to the molecular level ( <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /> ); one can&#039;t expect something as cheap as an Airtite to display perfectly flat surfaces at a dimensional tolerance capable of achieving an interference fit that&#039;s also possible to pry apart later.</p><p><br /></p><p>But in the real world, where Red copper in TPG slabs can stay Red for decades - examples abound - and in conjunction with the other appropriate long-term storage steps, I see no reason to believe it isn&#039;t possible to achieve an <b>effective</b> air exchange rate of sufficiently close to zero with Airtites for our purposes. Especially if your plan is to ruin the whole arrangement by <b>ever</b> taking the coin out to look at. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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