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<p>[QUOTE=&quot;desertgem, post: 1888089, member: 15199&quot;]Cotton/paper typically has a hardness of approx. 5 Mohs, whereas silver, gold, copper and zinc.is about 3 Mohs, or 100X softer than cotton gloves. That is why cotton fibers, swabs, microfiber, etc. can scratch coin surfaces. </p><p>Paper cuts readily indicate that skin is softer than celluolose</p><p><br /></p><p><br /></p><p>Rather non-scientific to say always use cotton gloves with coins. Any dust on the cotton ( dust is microscopic quartz with 7 Mohs, 10000X harder than coin metal) , so a new pair would be expected.&nbsp;&nbsp; </p><p><br /></p><p>Purists say nothing should touch the surface of a coin except maybe distilled water , acetone, soluble solutions.</p><p><br /></p><p>So I take John Anthony satire as&nbsp; good humor. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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