Plating Flaw - Copper On 5 Cent Showing

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Author	Replies: 2 / Views: 1,314
wilsonwu89 Pillar of the Community Canada 705 Posts	Posted 04/09/2016 10:33 pm http://www.ebay.ca/itm/2001-P-CANAD...AOSwEK9XAatB PMD? The seller has other types of coins for sale that look chemically altered. How do you achieve this? Report this Post to the Staff

SPP-Ottawa Moderator Canada 10456 Posts	Posted 04/09/2016 11:24 pm Plumbers torch, with another coin on top to protect part of the plating... "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert Oppenheimer Content of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_US My eBay store Report this Post to the Staff
DBM Pillar of the Community Canada 9863 Posts	Posted 04/10/2016 01:38 am PMD for sure but I don't think it was done with heat. The coin has a steel core that is first plated with nickel, then with copper, and finally again with nickel. Nickel melts at about 1500 and copper at about 1100, unlikely one could melt the nickel layer without affecting the copper layer beneath. Possibly done somehow with HCl. "Dipping" is not considered cleaning... -from PCGS website Edited by DBM 04/10/2016 01:39 am Report this Post to the Staff
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