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<p>[QUOTE=&quot;352sdeer, post: 3811016, member: 91351&quot;][USER=106954]@James R[/USER] </p><p><br /></p><p><b><font size="4">Skid marks (roll slip)</font></b></p><p>Polished or burnished streaks across the stock surface resulting from improperly set roller driven material processing equipment. Skid marks are transverse to the direction of rolling.</p><p><br /></p><p>I got the the above from a metal wholesalers web site. I’ve seen this type of surface anomaly in steel sheets and strapping many times over the years and I’ll bet the zinc sheet coils suffer from the same affliction. When platted with copper later it shows this kind of surface in planchet then coin after striking. Aka roller marks. Just my thoughts.</p><p><br /></p><p>Reed[/QUOTE]</p><p><br /></p>

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