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?
Straight from the horse's [HOMERUNHALL] mouth about halfway down page 2. I believe they took another 3 years or so after that to remove the...
Here is a link to where it was mentioned....
Here are some pics of spotted ASEs. The bottom one shows that they need not be round. The tea colored spotting leads me to believe that there is...
A number of years ago the spotting on a NGC slabbed ASE was examined using a technique called ESCA Electron Spectroscopy Chemical Analysis aka...
Initially, it was $50 grand. it may still be that.
Separate names with a comma.
