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<p>[QUOTE=&quot;desertgem, post: 815054, member: 15199&quot;]Hi Namvet,</p><p><br /></p><p>SAFEST:</p><p><br /></p><p>&nbsp;&nbsp; Hard plastic holders, such as Airtites, Kointains, Coinedge, Capital and other Acrylic, <font face="Verdana"><font size="2">polystyrene holders such as Eagle, Whitman, Harris, and others.</font></font></p><p><font face="Verdana"><font size="2"><br /></font></font></p><p><font face="Verdana"><font size="2">&nbsp;&nbsp; Flexible plastic flips made of Mylar, PET, or Polypropylene such as E&amp;T Saflips.</font></font></p><p><font face="Verdana"><font size="2"><br /></font></font></p><p><font face="Verdana"><font size="2">SAFER:</font></font></p><p><font face="Verdana"><font size="2"><br /></font></font></p><p><font face="Verdana"><font size="2">&nbsp;&nbsp; To a lesser degree, but generally acceptable ( not archive quality) for common coins, if maintained within normal temperature/humidity conditions are non-plasticized PVC such as Saf-T-Flips. </font></font></p><p><font face="Verdana"><font size="2"><br /></font></font></p><p><font face="Verdana"><font size="2">=============================================</font></font></p><p><font face="Verdana"><font size="2"><br /></font></font></p><p><font face="Verdana"><font size="2">&nbsp;&nbsp;&nbsp; None of the above are really air tight, not even slabs. Some are better than others, but unless vacuum sealed, they&nbsp; can all be exposed to environmental conditions that can lead to toning and possible corrosion. I am sometimes surprised to see coins in safe holders then stored in plasticized PVC binders, or in cardboard boxes that are not protected, or in safes with PVC binders, insurance policy holders, etc.</font></font></p><p><font face="Verdana"><font size="2"><br /></font></font></p><p><font face="Verdana"><font size="2">Food storage quality zip lock bags do offer further protection for cardboard albums, etc.</font></font></p><p><font face="Verdana"><font size="2"><br /></font></font></p><p><font face="Verdana"><font size="2">Hope this has been a little help. Since some opinions may vary on this, IMO.</font></font></p><p><font face="Verdana"><font size="2"><br /></font></font></p><p><font face="Verdana"><font size="2">Jim</font></font></p><p><font face="Verdana"><font size="2"></font></font>[/QUOTE]</p><p><br /></p>

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