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<p>[QUOTE=&quot;Just Carl, post: 141640, member: 4552&quot;]Acid free does not mean Sulfur free. It could simply be referring to no crystaline coumpunds that will become acidic when exposed to moisture. Regarless, wrapping coins in paper is not wise since most, not all, papers are porus. This means that moisture, gases, miscellaneous liquids can filter through to make contact with the coins. If you care about the coins and are collecting them, do not use paper to wrap them. In all chem labs a form of paper is used to filter out&nbsp; impurities in liquids indicating the liquids will pass though but some substances will not.[/QUOTE]</p><p><br /></p>

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