Yankee, thanks for the research. After reading them and also looking over the book on heat annealing, I am starting suspect more the solutions...
Thanks Yankee, that is an interesting article. I can start searching for patents filed by the company. Analysis of the spot composition would be...
That is farther down the chain, I need to determine if there are early indicators that ammonium compounds are even produced by the newer annealing...
The other thing is that the quote source above says the mix is ~96% N, and 4% H, but other gas mixtures such as this used in other annealing...
I have not been satisfied on this, as I have not been able to find of what this 'wash' consisted, and why it would form a insoluble metallic spot...
The thread on milk spots made me consider the annealing of the planchets before striking. I found the statement that the SF mint now uses a...
Play nice guys, dump the snarky comments. Last warning, thanks.
Yes, but acetone will not react with metal, whereas acetic acid ( including substances containing it, vinegar, ketchup ( catsup) taco sauce, etc....
Thanks, I appreciate the update. I have used BadThad's solutions on bronze ancients ( my son has a thing for them) with good result with out any...
My apologies John, I am glad to hear that about electrolysis. Many in both groups of collectors use it as a 'secret or proprietary' cleaning...
Probably in your profession , you have seen museum coin collections including US coins. Most of them are what would properly be classified as...
Quite different requirements and only a few can deliver them. http://en.wikipedia.org/wiki/Good_Delivery
"the NBA proposed the use of a microfiber ball for the 2006–07 season. The ball, which is manufactured by Spalding, does not require a "break-in"...
Of course moderators can express their opinions, pro or con, taking sides on subjects , satire, humor, etc. as they are full members just as...
Mountains out of molehills, but nice you apologized for your misunderstanding.
Not sure why it would be called the big one, but Wexler and Flynn Authoritative Reference on Lincoln Cents ( 2009) has it at XF $50, AU $95, MS60...
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The Article below was written in July 2009 "The dollar bears are having a field day with the fall of the dollar. I'm also a dollar bear, having...
https://www.cointalk.com/directory/ Here is a directory of coin dealers, including 3 internet dealers that are members. Many internet sellers...
Trying to make a 3 - legger
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