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<p>[QUOTE=&quot;Oldhoopster, post: 4299436, member: 84179&quot;]To clarify your post, die deterioration doubling and&nbsp; mechanical doubling are different. MD can occur on a new die as well as an old die.&nbsp; It&#039;s caused by a die being loose in the fixture and moving slightly as it strikes the coin. With multiple strikes per second and tons of pressure, it&#039;s easy to understand why a die may become loose during production.</p><p><br /></p><p>[USER=77814]@Clawcoins[/USER] has a nice explanation above for DDD.&nbsp; Generally, as metal flows into a die, it doesn&#039;t like sharp edges. Over the course of tens of thousands of strikes, the edges began to wear away.&nbsp; Notice on many DDDs that the doubling is on the the sides of the letters next to the rim.&nbsp; This is the direction of metal flow in this part of the coin.&nbsp; Towards the rim.&nbsp; So this is where you would expect the metal erosion.&nbsp; </p><p><br /></p><p>So ejecting the coin from the die chamber has no real effect on MD and DDD.&nbsp; Here is a reference that explains MD.</p><p><br /></p><p><a href="http://www.doubleddie.com/144822.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.doubleddie.com/144822.html" rel="nofollow">http://www.doubleddie.com/144822.html</a></p><p><br /></p><p>And here is one for DDD</p><p><br /></p><p><a href="http://www.doubleddie.com/144843" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.doubleddie.com/144843" rel="nofollow">http://www.doubleddie.com/144843</a></p><p><br /></p><p>Hope this helps[/QUOTE]</p><p><br /></p>

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