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<p>[QUOTE=&quot;Gallienus, post: 2802625, member: 42034&quot;]&quot;it is now a <b>source</b> of moisture to cause even worse problems than no desiccant,&quot;</p><p>Not really,&nbsp; the SiO2 will release the water it holds only at elevated temperatures. As you can see on the canister I&#039;ve photo&#039;d it&#039;s recommended to put it in an oven at 300F.&nbsp; After an hour of so the water&#039;s gone and the built in indicator changes to blue.</p><p><br /></p><p>You can also judge how quickly the water gets back into your coins by how quickly the indicator changes back to pink.</p><p><br /></p><p>Also it&#039;s critical to keep sulfur (S) compounds or things with S away from coins.&nbsp; Some rubber bands contain sulfur, also old plastics which contain PVC.&nbsp; </p><p><br /></p><p>Additionally lower temperatures are preferred and for high end sensitive coins, storing them without oxygen is also good.[/QUOTE]</p><p><br /></p>

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