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<p>[QUOTE=&quot;GDJMSP, post: 1535669, member: 112&quot;]Cardboard 2x2s are bad for several reasons. For one they all have and produce cardboard dust, that dust can and will cause spots on your coins over time, and the dust can scratch the coin. They can be bad because of the staple issue, staples can scratch the coin in the 2x2 when you take it out, or they can scratch other coins. The 2x2s are also bad because the thin mylar window offers no protection to the coin inside. Drop something and it will ding the coin right through the mylar. The coins also slide around inside, that&#039;s how the dust manages to scratch them. And the sliding around produces rub (wear) on the coin. The cardboard also attracts and absorbs moisture right out of the air and then holds it close to your coins. And moisture is bad for the coins.</p><p><br /></p><p>The non PVC flips are bad because the coin slides around inside and causes rub (wear) on the coin.They are also bad because the harder plastic scratches the coins as you put them into or take them out of the flips.</p><p><br /></p><p>The soft vinyl PVC flips are bad for obvious reasons, the PVC.</p><p><br /></p><p>What should you use ? You should use hard plastic coin holders like Air-Tites, or the snap-lock kind that Prime Mover mentioned. You can also buy your own slab like coin holders. </p><p><br /></p><p>All of these holders hold the coin secure so it does not slide around. They provide a hard, protective barrier so nothing can ding the coin or scratch it through the holder. They also help restrict the air flow around the coin. They are not airtight, none of them, but they do restrict (lessen) the air flow and air is your coin&#039;s worst enemy.[/QUOTE]</p><p><br /></p>

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