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<p>[QUOTE=&quot;cladking, post: 884197, member: 68&quot;]I suspect the primary concern was to get the coins out to real collectors as quickly and in as secure of packaging as practicable.&nbsp; I doubt they gave the long term suitability of the materials a great deal of thought but someone likely knew they weren&#039;t adequate for long term.&nbsp; I noticed no apparent problem for many years before they started turning.&nbsp; </p><p><br /></p><p>There is so much done exactly the same to each set that even those which show no signs of trouble like the 1986 might have trouble in the future. Normally the problems should appear in sets stored under the worst conditions first so there should normally be a warning.&nbsp; </p><p><br /></p><p>I believe most of the more modern US packaging will prove good for long term storage.&nbsp; Some of the problems are independent of the packaging and a function of the way the coins were made or processed before they were packaged or even before they were minted.&nbsp; </p><p><br /></p><p>Keeping an eye on them and good storage is important.</p><p><br /></p><p><br /></p><p>There are a few packaging materials that I suspect were designed to injure coins but I doubt any mints used packaging with the intent of damaging them.&nbsp; Most mint sets are composed of either specially made or specially selected coins.&nbsp; It just doesn&#039;t make sense that they&#039;d want to diminish these in any way.&nbsp; Watch out for privately made folders, albums, and holders though.&nbsp; It seems the softer it is the more likely to cause problems.&nbsp; Look for airtight and try to store coins in good conditions including low humidity and constant temperature.[/QUOTE]</p><p><br /></p>

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