It's hardly relevant to ASEs. The spotting isn't due to detergent/s.
You may find the linked video interesting. [MEDIA]
Looks like I spoke too soon. There is a manual washing step as well as a drying step, but not a lot of detail is given about them.
Indeed you did.
IIRC the hydrochloric acid treatment was allegedly started back in 1921 which explains why the 1921 Morgans and Peace dollars and subsequent 90%...
At any rate, we don't know that the mint uses the same process of planchet/blank preparation for all of the various silver eagles.
That seems somewhat dated and not sure why it would be necessary here. As a practicing chemist, I used to make Copper(II)Hydroxide from Cupric...
That's a little different than the process described for the silver blanks at the SF mint. The implication is that a quenching bath is not used....
It would appear from the articles that this is not true then. The only place that chemicals are introduced is in the burnishing step and the...
I do not believe that those conditions are sufficient to produce ammonia. Look up Haber process. Usually significant pressure is required.
Why would you think that the Mint is putting some kind of coating on the coins after they are struck? What would be the point of that? Assuming...
Where do you think the silver chloride comes from? It occurs to this observer that the planchets/blanks when put through the annealing process...
IIRC I used the common ordinary 28% Mallinckrodt material. I used it both right out of the bottle and diluted with water. Tried it at room temp...
But it won't dissolve the milk spots from ASEs. Been there, tried that.
There are techniques to analyze the spot on a coin without scraping it off. ESCA/XPS is one that comes to mind. I think the white spots have been...
This and I believe they will cover gold and silver bullion which aren't covered by USPS insurance unless you use registered mail.
As I understand it a hydrogen/nitrogen mix is used during the annealing process to minimize slag/oxidation. The planchets/blanks are still cleaned...
As you are probably aware, the PCGS site is hard to search for specific items. As I understand it the reward was for a practical method to remove...
Well, you could solicit on the PCGS or NGC message/BST boards to buy a couple spotted ones like like I did. The pics were posted earlier. I can...
The 2014s and 2015s seem to be pretty nice. Anyone notice any problems with coins from these years?
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