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<p>[QUOTE=&quot;Kentucky, post: 1521938, member: 33176&quot;]Trying to keep objects away from moisture and air is difficult.&nbsp; We live under an ocean of air.&nbsp; That air (in most of the USA) contains appreciable amounts of moisture, otherwise our lungs would dry out.&nbsp; Admonitions for keeping REALLY rare coins include sealing them into containers with moisture removing compounds or devices (dessicants).&nbsp; For some museums, they go a further step in filling the storage containers with nitrogen or one of the noble gases.&nbsp; This last step is impractical for most individual collectors and of somewhat dubious value.&nbsp; On the other hand, we want to preserve things resonably so that we can enjoy them all our lives and that our decendents can enjoy them too.&nbsp; Putting a coin in a flip or a 2x2 and then putting that in a slide page is insulating it from a lot of the environment (which includes oxygen, moisture and other degrading gases and vapors we live amidst) and stabilizing it.&nbsp; If a coin is just placed in the slide page, it is more suceptable to the atmosphere since the slide top is really open.&nbsp; The last slide pages I bought were from Staples and say &quot;PVC free, latex free, acid free, archival quality&quot;&nbsp; I tend to trust that for my non-world class collection.&nbsp; Happy collecting.[/QUOTE]</p><p><br /></p>

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