1961 50 Cent Struck Through Cloth? - Page 5

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SPP-Ottawa Moderator Canada 10463 Posts	Posted 06/20/2014 07:59 am I think "hardened" is a misnomer here. You can raise dates on Buffalo nickels, because of how the metal flowed into the devices during the strike, I can't possibly see how absolute hardness can be altered with striking a uniform alloy, differentially, other than annealing processes. If it can - there has to be a paper on that somewhere... "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 9868 Posts	Posted 06/20/2014 10:49 am It is the flow of metal into the devices that is the cause of cold process hardening, altering the crystalline structure of the metal. Nic a Date preferentialy etches the relatively softer metal surrounding the date. "Dipping" is not considered cleaning... -from PCGS website Report this Post to the Staff
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