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<p>[QUOTE=&quot;desertgem, post: 1318147, member: 15199&quot;]I have said several times here, that early coin collectors including ancient coins often have a different idea of cleaning and storage. There are a few things in the article I would not practice.</p><p><br /></p><p>1. The use of any oil/surface agent such as MS-70, coincare, olive oil of any virginity, etc. </p><p>2. The storage in cotton sacks unless I had a certification they were of archival quality as processing can use acids or alkali and must be rinsed completely . Also cotton can capture dust ( silica particles) with a hardness greater than copper or silver as I do not believe people change the bags each time they bring them out of the envelope. </p><p><br /></p><p>Now #2 is nit picking, as I don&#039;t know how often they are brought out for &quot;looking&quot;.</p><p><br /></p><p>Doug and I both commented on the PVC flips ( soft, non-scratching ) compared to the non-PVC ( harder, possible scratching ), and if you are taking coins to the public such as selling, then the PVC holders might be the answer due to the handling. If the coin is just your collection, and you know better than to move them in and out of mylar flips, then that is best for storage.&nbsp; If you seal the flip, it is air tight, and should be the best one can do. I use this on the flips.</p><p><br /></p><p><a href="http://www.amazon.com/Impulse-Sealer-Cellophane-Bag-sealer/dp/B000UVMKO8/ref=sr_1_2?ie=UTF8&amp;qid=1323117943&amp;sr=8-2" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.amazon.com/Impulse-Sealer-Cellophane-Bag-sealer/dp/B000UVMKO8/ref=sr_1_2?ie=UTF8&amp;qid=1323117943&amp;sr=8-2" rel="nofollow">http://www.amazon.com/Impulse-Sealer-Cellophane-Bag-sealer/dp/B000UVMKO8/ref=sr_1_2?ie=UTF8&amp;qid=1323117943&amp;sr=8-2</a> </p><p><br /></p><p>although there are many brands and sizes. Just be sure the impulse is adjustable ( knob on front) as the setting for mylar should be enough to seal it and not burn through.PVC holders can be sealed to prevent switching also ( different setting) IMO.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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