I really do not know why someone would want to remove the coating ( 1 or few molecules thick) on the coin. I have used it on many coins to PCGS...
Unless all coins are stored in a total vacuum, that is what they are constantly doing, forming bonds with the metal. Maybe only one or two people...
Sorry, full coin before slabbing. jim [ATTACH]
Here is the edge you need to see. This is my 09 proof, see the sharp right angle. No chamfer ( rounding ) as on business strikes\ jim [ATTACH]
Certainly it was more enjoyable to use gold sputter in a vacuum bell to coat the tiny creatures' parts. It was either work in the lab or work for...
Appears to be one of the type 6 DDR for that year. Compare with the photos on coppercoins.com https://www.coppercoins.com/diesearch.php
You can melt them for the following https://www.law.cornell.edu/cfr/text/31/82.2 (b) The prohibition contained in § 82.1 against the treatment...
No, I see no doubled die effect. If you are talking about the dark area around the outside of the D , that is normal. The sides can not be...
Any clean glass jar with flat surface top. Glass or porcelain tile on top, galzed side down works great.
Back in the 60's I used osmium tetroxide as a heavy metal stain in college electron microscopy work for chromosomes of Drosophlia and bacterial...
In case of a US-Wide or World wide " Will mankind survive tomorrow" who will sell you anything for silver or gold or cash if they are not sure...
The glucocats react to the acetone content in your breath. I have wondered what they would do if one was using acetone on their coins. IMO, Jim
As I recall seeing as an illustration in a book or magazine ( yeah way back then) that the base of the obverse and reverse were different enough...
As reading down the thread, it was my first thought also as I have seen silver plated Chinese Copper core coins that had this coloration. I am...
The last 2 steps for minimum to no residue on a coin, is that after any treatment , do a final rinse with water, drain by holding between thumb...
Cointalk seems to be blessed (or cursed) with an abundance of scientific based individuals. I know at least 8+ are chemists or chemistry teachers...
Just let it evaporate into the air. People breath out acetone from metabolism, People with diabetes can breathe out 1000X of a normal person and...
I see no verifiable doubling. Jim
I believe it might be correct, but in today's bizzaro world, nothing would surprise me. :muted:
Aww Jeff, Some people on here seem to like misery. Real Hoarders don't sell anyway no matter how high the price goes, to them it will always go...
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