Poorly conducted experiment based on the given information. There's no way acetone is going to photocatalyze to acetic acid under "ambient...
You got a great deal on that! I've been looking for one for a long time.
1968 was the last year for the obverse master hub. At that point, the hub was so worn that the dies produced from it had a dished appearance and...
Nice cracked skull!
I've had this happen a couple times, both times acetone kind of hazed the surface. I ran the coins though water and xylene after the acetone, then...
A 1915 in VF is worth about $15. This is one of those types of coins definitely worth saving but not worth enough to send to NCS.
63/64 details
63/64 RB, the pictures make the any luster look flat. $25-30 coin
Nope, just a regular business strike.
Personally, I wouldn't call a molecular layer a "film", since it completely undetectable by eye or even instrumentation (i.e. PCGS sniffer).
Copper coins seem to have the ability to pick up and hold black, gummy residues. In chemist speak, these are typically long-chain, organic...
And why do you think that residue is green Doug?
If you see green/blue-green on a copper coin, it is verdigris. Generally, ancients excluded, removing heavy verdigris will result in an...
(109) Q: Can VERDI-CARE™ be removed? A: The product is water-soluble and 99.99+% of it can be removed using water. The ReAcT2™ layer is...
It's a difference between his pictures - the lighting is too strong in the after pics and cutting through the patina.
Worked better than I thought it would. Some of the reverse verdigris looked really heavy. Thanks for sharing!
OK, stop confusing people Rusty! LOLOLOL The product is VERDI-CARE, VERDI-CHEM is the name of my company. :)
Come on Doug, call it what you always do - CLEANING! :p:D
VERDI-CHEM is the name of my company. The product name is VERDI-CARE. Due to this confusion, I recently modified my label. Hopefully, this will...
The product is not "wearing off" like Rick said, it is drying and polymerizing during the 24+ hour period. You cannot "over dry" but most of the...
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