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<p>[QUOTE=&quot;alurid, post: 3515519, member: 81991&quot;]The grooves do not line up with the design to be Accidental Die Abrasion from the feeder fingers as you suggest.&nbsp; The Lines you see can be caused when the zinc is being rolled to the correct thickness. I believe this is why the lines are straight and parallel. At this point any contamination can be pressed into the metal which may then cause a problem with the plating process. The lines look like they go under the designs due to the metal distortion as it flows into the design has the effect of erasing the lines from sight. This has been my understanding of Linear Plating Blisters.[/QUOTE]</p><p><br /></p>

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