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Uncleaned The unique joys of uncleaned coins.

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Old Feb 14, 2007, 11:02 PM   #1
MissouriTiger
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New Ideas for cleaning coins...

Keep in mind that I am a total idiot and don't knwo a fel temp from a felt pen, but I as I have ordered a bunch of uncleaned coins...

I have a few ideas I haven't seen mentioned on the web, so I thought I'd toss them out and see what you guys/girls think. Maybe they've been tried, maybe they're too crazy to even attempt.

1. For crusty coins, why not Lime-Away? It dissolves certain minerals like magic, but ddesn't seem to harm metals. As for patina, well...

2. Boiling coins in vinegar. Vinegara is acetic acid, and has it's uses. Heat always increases reactions (except in the case of calcium cargonate, which precipitates when heated).

That's all I can think of right now. Any thoughts/reactions?
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Old Jun 28, 2007, 01:16 PM   #2
bruce61813
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In general any acid and bronze is not a good combination. IT may clean the coating away, but the bronze, especially the copper, is oxidized to a raw, native copper color and is ugly.

1. For crusty coins, why not Lime-Away? It dissolves certain minerals like magic, but ddesn't seem to harm metals. As for patina, well...
I does work, but must be controlled, don't just toss the coins an and walk away. It does harm the metals. Copper alloys and acids don't place well together.


2. Boiling coins in vinegar. Vinegara is acetic acid, and has it's uses. Heat always increases reactions (except in the case of calcium cargonate, which precipitates when heated).

Same as the above. Even weak acids like acetic acid react with copper and it's common allows. If you must use them, a dip and scrub method is better. For long term cleaning and soaking, a high pH or alkaline solution is far better.

Bruce
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