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<p>[QUOTE="Oldhoopster, post: 4978117, member: 84179"]Yes, sort of. A typical lamination is due to impurities and/or trapped air pockets that occurred during the original melt. The OPs coin is caused by a plating defect where the copper didn't stick to the zinc core due to some type of contamination (dirty blanks) as pointed out by others. It's due to the plating process, not the melting/alloying process. If the defect was under the surface of the zinc and occurred during the zinc casting process then it would be a lamination</p><p><br /></p><p>BTW: I prefer the term delamination (along with some other members) as it better describes the defect, but that hasn't worked it's way into the hobby nomenclature yet.[/QUOTE]</p><p><br /></p>
[QUOTE="Oldhoopster, post: 4978117, member: 84179"]Yes, sort of. A typical lamination is due to impurities and/or trapped air pockets that occurred during the original melt. The OPs coin is caused by a plating defect where the copper didn't stick to the zinc core due to some type of contamination (dirty blanks) as pointed out by others. It's due to the plating process, not the melting/alloying process. If the defect was under the surface of the zinc and occurred during the zinc casting process then it would be a lamination BTW: I prefer the term delamination (along with some other members) as it better describes the defect, but that hasn't worked it's way into the hobby nomenclature yet.[/QUOTE]
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