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<p>[QUOTE=&quot;daveydempsey, post: 1404410, member: 29458&quot;]I agree with Moneyer but not just hammered coinage, ALL coins. </p><p><br /></p><p><br /></p><p>I`ve collected coins for over 50 years and never had the need to get them put in plastic coffins or graded by some blokes in an office and then a number assigned to them.</p><p><br /></p><p><span style="color: #1a1a1a">The plastic used by the slabbing companies is usually some kind of trade secret, but no doubt it&#039;s as stable and inert as their R&amp;D departments can make it, and should do no harm to the coins for the short or medium term. But frankly, we simply don&#039;t know how any kind of plastic will behave in the long term - plastic hasn&#039;t been invented for long enough. They can do all the artificial ageing tests they like, but the only true test of how a material ages is to wait around for several centuries and see what actually happens. </span></p><p><span style="color: #1a1a1a"><br /></span></p><p><span style="color: #1a1a1a">We know some plastics degrade very quickly, and destroy any metallic objects embedded in them as they degrade (the plasticized PVC you often find in cheap coin albums is an excellent example). We also know that plastics are not eternal, and slabs certainly will not last as long as the gold, silver and copper coins they are purporting to protect.</span>[/QUOTE]</p><p><br /></p>

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