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<p>[QUOTE=&quot;Just Carl, post: 125829, member: 4552&quot;]I am not really sure of the material of the plastic that is included in the 2x2&#039;s but I&#039;ve had coins in them for well into 30 to 40 year range and no problem yet. However, that may just be a short term reaction. I&#039;ll let you know it there is any adverse effects in the next 100 to 200 years. Same is true of the plastic in my Dansco and Whitman albums. Not sure of the material in the plastic in them either. Now remember that all plastics are composed of synthetic organic materials that are basically non reative with metals unless exposed to a catalyst and proper temperatures to facilitate the reactions. PVC is a stable compound of Poly Vinyl Chloride and will not readily react with coins. In other words if you leave your coins in the plastic 2x2&#039;s and do not expose them to very high temperatures, very high humidity, other possible catalysts, nothing should occur regardless of the plastic materials components. That is usually mistaken on coins as a PVC reaction is usually caused by exposure to extreame heat leaving only a residue of the PVC there which did not react with the matal itself. Other items on coins is usually caused by exposure to the elements of our atmosphere. </p><p>Not to get to tecnical but for instance the oddly misundersatanding of sulfur reacting with copper coins is absurd. The Copper in coins reacts with CO2 in the air first. The resulting compound is what reacts with Sulfites and Sulfates to create the geenish stuff we see on coins.[/QUOTE]</p><p><br /></p>

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