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<p>[QUOTE=&quot;Mernskeeter, post: 3503520, member: 97686&quot;](Not divoid from the coefficient of thermal expansion)</p><p><br /></p><p>I am interested in what you guys are talking about in this thread. In my mind I have read to understand the following:</p><p>&nbsp;A Planchet expands radically when struck creating radial flow lines as it [fills] the collar. A planchet being smaller to start with would drag to conform itself outward against the surface of the die. Forming tiny grooves over it&#039;s course the die will then transfer these to subsequent coins. As the metal [planchet] is flowing in whatever direction it takes to get to where it needs to be the effects can differ near or around the devices. It is true then as the die wears it will impart those micrscopic lines that catch the light to form it&#039;s particular lustrous appearance. So wouldn&#039;t it be safe to say since &quot; it&#039;s&quot; limited ..that the metal goes with the flow?[/QUOTE]</p><p><br /></p>

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