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<p>[QUOTE=&quot;John Burgess, post: 7601539, member: 105098&quot;]How precious. This person&#039;s never heard of the concepts of friction or errosion. Where softer items produce wear on harder items through simple contact over time i.e. hairline scratches.</p><p><br /></p><p>Psst. Kraft paper, because of the manufacturing kraft&nbsp; process, off gasses chemicals that are alkaline, and is unsuitable for coin storage. You may get away with a short term for shipping/delivery purposes but if the receiver doesn&#039;t know and leaves it like that for a long period of time they might find an ugly black coin when they look again.</p><p><br /></p><p>And yes music can scratch a coin if it&#039;s loud enough and causes vibrations that move the coin against another surface which will cause friction and wear on the coin.</p><p><br /></p><p>circulated coins have friction wear. hands/ pockets/purses, and other coins, all as hard or softer, but not harder than the coin, causing wear through friction slowing wearing a coin down to nothing. And yes even a little bit is detectable with magnification.[/QUOTE]</p><p><br /></p>

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