Discussion in 'Coin Chat' started by riff, Feb 11, 2013.
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I think that peace dollar looks good though btw.
No comment on whether removing tarnish qualifies as the "C" word.
I feel the same way. The ONLY coins I've ever cleaned were heavily circulated junk silver coins, and primarily for educational purposes.
Why? some coins NEED a cleaning. if you are throwing bullion in a sack, what does it matter if its cleaned or not? if one feels compelled to clean a coin, clean a coin. i have coins that i wont ever sell, so if i want to clean them up, why shouldnt i? contrary to popular belief, it doesnt ALWAYS hurt the value. in some cases it can improve it.
But you did it on a Peace Dollar. BTW, if the coin is covered by the solution and in contact with the aluminum, both sides should become de-oxidized. I don't use this method with coins but I've used it many times with sterling flatware. As noted upthread the water does not have to be boiling hot. Opinions vary on the addition of salt. The silver must be in physical contact with the aluminum (although technically you can chain the silver contacts).
The electrochemical activity will reverse the effect of tarnish but as noted will not remove grime etc. It could be argued that it's not a cleaning, technically speaking. However, the results on old, soiled coins will be irregular. Additionally, the reversal of the silver sulfide reaction will de-patinate old surfaces on a molecular level and with flatware sometimes a light polishing is indicated to restore an attractive sheen. You would not want to do this with your valuable coins.
The best description of the chemistry that I have found is here:
I love when people say this. Sounds more like a command than a recommendation. Anyway, coins that are worth melt are still worth melt, no matter how harshly cleaned. So... clean away, if the mood so strikes.
Originally Posted by Morgandude11
DO NOT clean any coins.
Not a command, more of a commandment, and we know how many people break those. The full commandment is "Thou shall not harshly clean any coin". The electrochemical method does work well to take off tarnish, but it would strip any luster there might be on the coin, so don't use it to try and remove unsightly toning to get a lustrous coin.
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