How and ways to clean a coin.

anyone have any ideas?. please tell us.

 

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Don't...the ONLY way I do it and that is ONLY WHEN A COIN HAS PVC is with pure Acetone...cleaning coins take down the value...sometimes as much as 50%.

Speedy

 

Your best bet is to never clean your coins. Any type of cleaning you do will do some kind of damage to it.

 

Just don't clean them. Period.

 

how to clean a coin?.

during 1992, i bought some proof american silver eagle. i wrapped inside a padded envelope and kept for so many years. when i opened it up recently. some of the coins were with some black spot. it is because of pvc content inside the wrapped envelope. how can i clean them?. does dealers will willing to buy them?. will it be a big discount for that?. please help...

 

Silver eagles are worth 2 times there silver value at most; my local coin dealer gives $7 for any eagle

 

I don't think its PVC...PVC is green...not black...it might be carbon spots...or maybe some toning but I don't think PVC.

Morgan Dollar...he is talking about PROOF ASE...so they would be worth more than $7...

Speedy

 

cleaning coins

if it is carbon spot. should i clean or dip with some cleaning liquid?. or how can i clean those black spot?. clean or not clean, is the price of that piece will go down?.

 

I wouldn't clean it...a carbon spot will take down the value but it will also take down the value to clean them...the best thing to do is leave them in the MINT holder.

Speedy

 

cleaning the old coins

i remembered many years ago. i use toothpaste and toothbrush to clean some of my dirty morgan dollars. well, it doesn't improve the image. instead it damaged the coins. i sold them right away for few dollars each. i think it's bullion value. well. what can i say. past is past. now i don't clean any coins. if i don't like it. i sell them.

 

I have a few Standing Liberty quarters that I cleaned with a pecil eraser when I was younger. At the time I was immensely proud of myself and my newly brightened coins. Now all I can say is EEEK!!!

 

You've probably heard enough dont's and no-no's by now... but they're all right.... about the SAE's, they're not worth it. However if you have or find a good coin that's dirty and would have brought a premium otherwise, NGC has a service that will restore your coins for you. You can even have them cleaned, graded and slabbed all with one submission. If you have questions customer service can help you. I used this with a nasty gold peice i bought [cheap] and was VERY pleased with the results.

Go to www.ngccoin.com and read about it. They even have some before and after pictures of some of their work. It's the NCS service.

 

Do they still make BonAmi?

 

Do carbon spots only appear on certain types of metal? If so is it a result of oxidation?

 

Yes, and if you have All-Clad stainless steel cookware it works better than anything else.

 

Are carbon spots usually brown or green-brown? If so I'm assuming they would just be copper oxidation. 2 Cu + O2----> 2CuO

In which case, I would assume if you used something like sodium thiosulphate, or sodium hydrosulfite. Just conjecture though.

 

Anyone have any input on this? I may have to try some strong reducing agents out. On non valuable coins of course..