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<p>[QUOTE=&quot;ValpoBeginner, post: 2734253, member: 77066&quot;]Coins will simply not tone in a vacuum.&nbsp; TPG containers are not vacuum sealed.&nbsp; They are sonically sealed at the facility along with the air.&nbsp; It&#039;s hard to maintain a vaccum at 1ATM, or 15 PSI of pressure bearing down on us.&nbsp; Another way to prevent toning is to sonically seal the coin&#039;s with one of the noble gasses. And let&#039;s face it the TPG&#039;s could do a better job of sealing holders. The amount of air contained in a slab will not turn a coin from Red to brown, without a leak in it. The new&nbsp; and older holders both have leaks. If you don&#039;t believe me take your slab and dunk it into liquid 2-methyl butane and you will see that your slab is porus indeed.</p><p><br /></p><p>Our Declaration of Independence is stored in a glass container filled with pure inert Argon gas .</p><p><br /></p><p>I personally use a vacuum sealer with non reactive plastic to slow down any toning with my Dansco and Whitman folders. It&#039;s worked great so far. I open them once a year insert the coins of the year and back into the vaccun bag they go.</p><p><br /></p><p>The only way to insure that your coins will truly be protected for all time is to send them&nbsp; into orbit. But for the high end collector hopefully someone will invent a holder that doesn&#039;t leak with something other than air,&nbsp; like Argon inside it. Cheers to the future inventor of this product. I&#039;ll submit one or two at a $200 submission fee.&nbsp; I don&#039;t know if I would invest in such a company if it incorporated. Hopefully it&#039;ll just be a LLC.[/QUOTE]</p><p><br /></p>

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