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<p>[QUOTE=&quot;krispy, post: 2202591, member: 19065&quot;]I, on the other hand, do not trust all plastic materials the US Mint uses. I wouldn&#039;t trust the kind of plastic (as in the tray in the OP) let alone many of the US Mint&#039;s packaging materials for protecting coins. Metals are simply reactive by nature, perhaps more so to our eyes and sensitivities in their purer states that we force them into by refining and isolating them as such, but also in the presence of other chemicals prone to changing or decaying and gassing off. The only US Mint plastic I put any trust in is their version of the acrylic capsule, lens or holder. For example, any of the collectible silver Eagles I get from the Mint in velvet cases, I remove and store the capsules containing the coins in Ziplock bags and keep them out of the light and out of an environment that changes temperature and humidity drastically. Some of the velvet lined trays Mint products come in are the same plastic as the tray in the OP, with some powered material adhered to them. In this case you are dealing with pigments, plastics, and adhesives, all which can gas off and can react with coin surfaces. Paper material has all manner things in the pulp, from pigments to chemicals such as sulfurs thought to induce toning.[/QUOTE]</p><p><br /></p>

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