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<p>[QUOTE=&quot;Daggarjon, post: 570115, member: 4230&quot;]One thing i read on the making of PET, is that when its heated or melted, it gives off a gas. This is one of the problems i have with PET, becuase during the making of a flip, the gases released can coat the flip itself, and then get to my coins. </p><p><br /></p><p>also, read this </p><p><br /></p><p><br /></p><p>PET is not Mylar. PET is a polyester film, yes. But its different then mylar. Here is an email i got back from the makers of Kointains flips</p><p><br /></p><p><br /></p><p><br /></p><p>So by what they are saying, yes their flips are PET, but NOT Mylar. Mylar brand IS different then PET. even though both are parts of the polyester family. Some might think water is water right? add dirt to the water, and its still water... but would you drink it?</p><p><br /></p><p>TheNoost - i am NOT trying to worry or freak anybody out! I use Mylar sleeves myself. At least i hope they are Mylar, and not a different form of PET. I do not, at this time, have any flips i am using. I have a few assorted &#039;thing&#039; like slabs and envelopes and other containers. I need to get some sort of flip that really is Mylar or even better - really Archival safe, and not PET pretending to be Mylar.[/QUOTE]</p><p><br /></p>

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