Try a soak in acetone to start just to see if it's PVC.
Agree with the other posters, the patina was hiding the hairlines on the coin. NCS would not do that to a coin.
I really like that 50-S!
Where's the obverse picture? I hate when only half a coin is posted. LOL
PVC is a catylist for verdigris formation created by hydrochloric acid forming cupric chloride. PVC damage and verdigris are essentially one in...
Heat it coin side down with a hair drier, it will come out after the airtite gets hot.
Dang, I wish you'd break these up because I'm too lazy to do the group all at once. LOL I really like the memorial cents! The 2006 is TOUGH to...
I fear one grader lower than my guess because it's a woody. It's an outstanding coin and my personal grade is a 65....but the TPG's suck at...
If it's a high value coin, conservation is always best left to NCS. If not, I would attempt it myself. Always start at the high end of the...
Definately a WAM! Congrats on the 1999 WAM....they are rare!
Same coin, different light. ;)
Nice doubled ear!!!
LOL...point taken my friend. :)
Don't let it evaporate in the soaking container. You want it to evaporate (and it will) during the rinse phase. This takes less than 10...
Here's mine:
Definately a dryer coin, worth 1 cent.
Sweet! Clawed my way back from #10 a couple of months ago. :D
Doug covered most of your questions. I will add a little.... In general, I rarely bath coins in acetone. I prefer to use it as a rinse in most...
Because copper is able to complex with many more elements (and molecules) than those other metals.
Every coin and surface residue problem is different, I cannot really answer your question. However, I always recommend using the solvent polarity...
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