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Acid Dating Junk US Silver... Yes, It Can Be Done!

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 Posted 07/08/2016  5:03 pm  Show Profile   Bookmark this reply Add Coinfrog to your friends list
Well, I guess I stand corrected!

But tell me, you say before and after pictures, but these look more like obverse and reverse pictures.
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 Posted 07/08/2016  5:08 pm  Show Profile   Bookmark this reply Add coinlover1899 to your friends list

Quote:
But tell me, you say before and after pictures, but these look more like obverse and reverse pictures.


By my understanding, the first two pictures are before the quarter was dipped, the last two pictures are after the coin was dipped.
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 Posted 07/08/2016  6:55 pm  Show Profile   Bookmark this reply Add edweather to your friends list
That's amazing.......I think the general thought on the forum was that it couldn't be done, and this is the first I've heard of it. Thanks.
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 Posted 03/14/2017  5:27 pm  Show Profile   Bookmark this reply Add XavierOfGreen to your friends list
Be extremely careful if you are mixing these two chemicals, they create peracetic acid which if the vapors are inhaled can permanantly damage your lungs
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 Posted 03/14/2017  6:28 pm  Show Profile   Bookmark this reply Add thecoinguy1964 to your friends list
I posted a couple of years back that my dad had a S.L. quarter set with many acid dates, and I was told that it was impossible. I never replied back. I personally have never done this, but will the dates remain for long, or do they also wear off? I pulled out my Buffalo nickel book set that I hadn't looked at in years, but with my failing eyesight, I couldn't read many of the dates any longer. Granted this was from wear, not acid.
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 Posted 03/14/2017  6:35 pm  Show Profile   Bookmark this reply Add coinlover1899 to your friends list
Post pictures of your nickels before you put acid on them.

I tried this on some silver, but it didn't work.
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 Posted 03/14/2017  11:17 pm  Show Profile   Bookmark this reply Add billjones to your friends list
Yes, it can be done, but why? There is little numismatic value there. If it happened to be a rare one like a 1916 Standing Liberty quarter, the acid date could lower the value. Those coins can be identified by the bottom folds in Ms. Liberty's skirt.

Coin authentication is not always as simple as it might seem.
Edited by billjones
03/14/2017 11:19 pm
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 Posted 03/15/2017  11:59 am  Show Profile   Bookmark this reply Add machine20 to your friends list
What about the 1921 and 23s? People would pay up for those
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 Posted 03/15/2017  2:43 pm  Show Profile   Bookmark this reply Add coloradobryan to your friends list
Ferric chloride is the main chemical in the stuff used to pull dates off of dateless nickels. It attacks COPPER... 75 percent of nickels, 10 percent of junk silver. Should work on junk silver.
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 Posted 03/15/2017  6:16 pm  Show Profile   Bookmark this reply Add briank to your friends list
They are still better than dateless coins. I'm amazed this can be done. How does the coin feel afterwards...is it rough?
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 Posted 03/15/2017  7:50 pm  Show Profile   Bookmark this reply Add Debrajc to your friends list
Thanks for sharing the results off your experiment COTW.
Very interesting.
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 Posted 03/16/2017  01:41 am  Show Profile   Bookmark this reply Add Chase007 to your friends list
I agree briank ,since they have a little or no value,they are better than dateless coins.
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 Posted 03/16/2017  5:54 pm  Show Profile   Bookmark this reply Add XavierOfGreen to your friends list
The way this works on any coin is via a metal etchant, peracetic acid can etch silver but doesn't work as fast as nitric acid does. There are metal etchant acids for every type of metal, you could technically bring back the date on a gold coin via the same method using aqua regia but thats even more dangerous than the silver etchants are.
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 Posted 03/16/2017  9:10 pm  Show Profile   Bookmark this reply Add coinlover1899 to your friends list

Quote:
I agree briank ,since they have a little or no value,they are better than dateless coins.


What about the 1918/7 D nickel. You start of with a .10 coin, and make it a $250 coin.

Same with the 1918/7 s quarter.
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 Posted 03/20/2017  7:47 pm  Show Profile   Bookmark this reply Add mail187man to your friends list
Just tried this on a SLQ after reading this post. The coin looks like garbage, but a faint 1930 is now showing. I left it overnight and the mixture turned green (oxidized copper?). Kinda cool but destroys any shine it once had.
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