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<p>[QUOTE=&quot;ronterry, post: 1074926, member: 28569&quot;]Late to the party, but at first guess these are creating possibly not by the mint but the coiled roll supplier. Issues with either the cladding, or the annealing of the metal causing the upper layer to contract leaving ripples.</p><p>&nbsp;</p><p>Should also add, without know the exact process on how they suface the gaint clad sheets the tool used could have been running at to high a feed rate or to low an RPM or both. Could also be where the tool either started on the sheet or lifted off leaving machining marks.</p><p>The dude&#039;s at the Mint can care hoody who on what it looks like when they feed it into the punch!</p><p>In the machining world we call this &quot;MADE ON A FRIDAY AFTERNOON&quot;.[/QUOTE]</p><p><br /></p>

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