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<p>[QUOTE=&quot;dougsmit, post: 673789, member: 19463&quot;]I thought the idea of these holders was to use once and throw out. Trying to sneek a coin past a staple is a scary thought.</p><p>&nbsp;</p><p>I have not bought staple holders for over 40 years but in the meanwhile I have received a few coins in them. In changing to my prefered storage system (trays - I collect ancients), I have noted the cardboard holders differ considerably on the clear material. Some have cellophane that makes a noise when wrinkled. Others have a material that stretches a bit and conforms to the relief of the coin. It is like a very thin rubber glove material. I know there are differences in mylar and the evil poly flips that turn to green grease and eat our coins. Are there differences in flips we need to be aware of, too. </p><p>&nbsp;</p><p>Just before joining this forum, I dug out my childhood US coin collection stored away (attic, basement, closet) for 40 years. A few (1-2%) coins had toned or spotted (ruined in my opinion) but most survived. There were a couple poly flips with slime but more were in old cardboards or paper envelopes. Some in cardboard folders had darker edges than when they went in. The worst were bright silvers in cardboards that fit snugly. I assume the coins had a spot of moisture on them when they were stapled since coins that spent the same time in the same box survived cleanly. I always warn ancients collectors against putting things that have been cleaned (all ancients have been cleaned) in something that will not let them breathe. I suspect the spotted coins would have spotted anyway but it is hard not to blame the holders they were in. I do suggest being absolutely sure coins going into any tight holder are dry. Humidity and time makes spots.[/QUOTE]</p><p><br /></p>

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