Try Coin Chemistry by Weimer. Simple ... but it proves my point.
The two main culprits are sulfur and chloride compounds from the air and even from your hands (i.e., sweat, moisture). Milk spots are sulfur based...
Bring your favorite counterfeits or Modern Forgeries to Whitman Baltimore. I will try to attend the EAC/C4 Meetings in March 2018. We can hook up...
I remember one coin I owned the famous Harry Foreman NJ Maris 10-G that brought $4-6K. It was ORANGE when I bought it (harshly cleaned) but had to...
Not to self promote but one of contemporary circulating counterfeits - World chapter of "Forgotten Coins" was a modern fake but it was...
NSP right ballpark but really copper with the elements chlorine and sulfur. See that simple book Coin Chemistry by Weimer. Not to self-promote but...
Verify the 2014 ANS article in the Eric P. Newman Portal. I just read the article there about a month ago.
Canadian Blacksmith Tokens.
Before you write your article check John Kleeberg's article in an ANS Journal 2014. I believe its the last one that can be viewed free at Eric P....
I just wrote a book (chapter) on Canadian tokens - Blacksmiths. John Lorenzo
This form of silver electrodeposition or your explanation of electrolysis is explained in my new book "Forgotten Coins." There amay be hundred's?...
Try Spanish American Coins (SAC) whether counterfeit or not - what is it with this topic - who cares day to day? They are on the rise with the...
Try the GNL Counterfeits they are more challenging. BUt these are a good investment <VVBG>. JPL
We describe all this confusion and answers in these two books: Forgotten Coins:...
A couple of comments. To me this does not look clipped but more likely hammered off-center. Counterfeits of this type as described in my new book...
I wrote over 100 articles on coins and just completed my second book. Its a fun experience but my graphic designer with coin photos was my major...
BTW my new book on Counterfeits is now on sale at Amazon Books. Forgotten Coins of the North American Colonies - John Lorenzo, Numismatist, United...
Word that my new book "Forgotten Coins" a book on Counterfeit Coins and their alloy make-up and detection will be printing in January after a five...
All the colors I previously reported in terms of copper colors I have seen in worn down corroded Large Cents or copper U.S. Colonial State...
As I have written in my upcoming book "Forgotten Coins" there are probably two major ways to gold plate a cent. The cent actually being almost...
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