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<p>[QUOTE=&quot;Vess1, post: 1411611, member: 13650&quot;]The intercept albums and holders are made of materials that are supposed to clean the air around the coin and neutralize any harmful contaminants that would cause toning.&nbsp;&nbsp; I think that&#039;s better than an air-tite since I don&#039;t think they are completely &quot;air tight&quot; anyway.&nbsp; </p><p>&nbsp;&nbsp;&nbsp; Either way though, short of vacuum sealing them and storing them away in a cool, dark, dry place, I don&#039;t think there&#039;s much else available to store your proofs in while still being able to present them.&nbsp;&nbsp; The positive thing is, most proofs from the 19th century still look great.&nbsp;&nbsp; And they existed long before air conditioning, or special holders.&nbsp; Though copper does tend to darken, no matter what you do.[/QUOTE]</p><p><br /></p>

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