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<p>[QUOTE=&quot;-monolith-, post: 24779732, member: 150064&quot;]I&#039;ve researched this topic to exhaustion. If you search this forum you will find a lot of discussions about it. So I will save you the time, here is the basic information:</p><p><br /></p><p>1. If you store your coins in flips, as I do, you have to use flips made of <i>polyester, polypropylene or polyethylene (aka - Mylar). </i>These flips are archival safe (long term storage) and often used by museums. Brand names are SAFlip or Coretek; other companies make them as well. For binder pages I recommend BCW Pro or Guard House Shield also made from the same archival products.</p><p><br /></p><p>2. Never use any flips, binder pages, or hard plastic cases that are made of PVC, Vinyl or Unplasticized PVC. This material will ruin your coins over time.</p><p><br /></p><p>3. The cardboard coin storage boxes are fine as long as your coins are in flips. Don&#039;t leave &quot;bare&quot; coins in the box because overtime the chemicals used in the adhesives and binding material can damage your unprotected coins.</p><p><br /></p><p>4. Only use acid free, also referred to as archival, paper for your flip inserts.</p><p><br /></p><p>P.S. I just saw an old thread, from about 10 years ago, in which one of the members contacted a well know museum numismatist to get their advise. It listed a lot of technical information and good advice. I tried to search for it again but couldn&#039;t find it, perhaps one of the moderator&#039;s can provide a link.[/QUOTE]</p><p><br /></p>

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