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<p>[QUOTE=&quot;Collect89, post: 417660, member: 15445&quot;]<b>Mylar has proven long term performance</b></p><p><br /></p><p><span style="color: black"><font face="Verdana">In my experience, Mylar has proven long term performance when used for storing coins.&nbsp; I would caution anyone from trying a different material unless there was some really compelling reason &amp; it could be tested for long term archival storage using inexpensive coins.</font></span></p><p><br /></p><p><span style="color: black"><font face="Verdana">My opinion is that stapled 2x2 cardboard with Mylar windows will work fine for lower cost coins.&nbsp; I have SEVERAL coins stored in them since the late 1960s with no adverse affects.&nbsp; Of course, I have seen spots &amp; fingerprints grow since some coins had that contamination on them (40 years ago) when they were originally put in the 2x2s.</font></span></p><p><br /></p><p><span style="color: black"><font face="Verdana">Also, hard plastic flips are good for long term archival storage in my opinion.&nbsp; I&#039;m referring to storage where the coins are not being accessed all the time.</font></span></p><p><br /></p><p><span style="color: black"><font face="Verdana">BTW, some of those low cost coins from 50 years ago are actually worth hundreds or thousands of dollars today &amp; they are just fine in the old 2x2s.</font></span></p><p><br /></p><p><span style="color: black"><font face="Verdana">To be honest, essentially all the 2x2 in my collection were replaced with new 2x2s in the early 1980s so that they all matched &amp; have flattened staples. </font></span></p><p><br /></p><p><span style="color: black"><font face="Verdana">I&#039;m reading everyone’s comments about airtites &amp; isoshields with interest.&nbsp; Any advice is welcomed.</font></span></p><p><br /></p><p><span style="color: black"><font face="Verdana">Very best regards,</font></span></p><p><span style="color: black"><font face="Verdana">collect89</font></span>[/QUOTE]</p><p><br /></p>

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