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<p>[QUOTE=&quot;Oldhoopster, post: 3794148, member: 84179&quot;]You’ve got a few things confused.&nbsp; Occasionally, improperly annealed blanks can take on a reddish or coppery tone depending on the furnace temps and atmosphere.&nbsp; At one time it was thought that this occurred due a fine layer of copper being deposited on the blanks and sintered onto the metal.&nbsp; However, this has been shown not be the root cause and sintered planchet errors do not exist.&nbsp; (See annealing errors at <a href="http://www.error-ref.com/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.error-ref.com/" rel="nofollow">WWW.error-ref.com</a>). </p><p><br /></p><p><br /></p><p>BTW: This thread is over 6 years old.&nbsp; It&#039;s always good to check the posting dates when commenting as many of the original people may no longer be around.[/QUOTE]</p><p><br /></p>

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