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Hydrogen Peroxide On Coins

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 Posted 10/30/2011  12:35 pm  Show Profile   Bookmark this reply Add just carl to your friends list
Note the H2O2 and remember that O is Oxygen and one of the worst enemies of Copper. Just one of the many wrong things for coins. Might as well use Lemon Juice, Orange Juice, Tomato Juice, battery acid, Olive Oil, Jewlery cleaner from Walmart, spit, dish soaps, baking soda and tap water and the list goes on of all the things people say ato use on coins.
Yet for some strange reason people that really know say DON'T CLEAN COINS.
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 Posted 11/01/2011  12:21 am  Show Profile   Bookmark this reply Add BadThad to your friends list
Peroxide will permanently damage the surfaces. It's fine for use on dig finds and heavily corroded coins to a limited extent because you can't often tell what you have without resorting to extreme measures. However, I would NEVER recommend it for normal coins of any kind.
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 Posted 02/22/2017  12:40 am  Show Profile   Bookmark this reply Add TommyP to your friends list
Love your responses Thad! Loved you over at the other forum. I had to get out of there, Those folks are too 'stuck up' and in need of counseling I think. They just can't wait to edit my posts and finally ban me. They caused me too much stress having to play their word games, always wondering if I was gonna get banned. I hated them. Anyway, glad you're here. While I'm talking to you, does soaking silver in hot water and baking soda for a few minutes and lightly rubbing the dirt off between my finders destroy the value of my coin? I trust your judgement. Thanks!
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 Posted 02/22/2017  10:02 am  Show Profile   Bookmark this reply Add jbuck to your friends list
Hydrogen-Peroxide-On-Coins

(At least you are asking good questions and not just bumping old threads to say "Cool!" )
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 Posted 02/22/2017  3:49 pm  Show Profile   Bookmark this reply Add BadThad to your friends list

Quote:
While I'm talking to you, does soaking silver in hot water and baking soda for a few minutes and lightly rubbing the dirt off between my finders destroy the value of my coin?


For most people, probably so. However, you cannot make a blanket statement that applies to all coins. Conservation/cleaning is a special subject because it all depends on: 1) nature of the problem 2) extent of the problem 3) ability/experience of the person performing the task.

The bottom line: If you cannot tell a coin has been conserved (experienced collector/dealer), than it has not and is market acceptable.
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 Posted 02/22/2017  5:41 pm  Show Profile   Bookmark this reply Add just carl to your friends list
Try remembering this about cleaning coins. Normally when you remove dirt, patina, rust, corrosion, toning or anything on a coin, some of the original material of the coin goes too. Yes you could make a coin look pretty and have that new appearance, but you could get the same results with a car polish and buffing machine.
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 Posted 03/02/2018  1:45 pm  Show Profile   Bookmark this reply Add Alex71 to your friends list
Thanks for the great question and all of the feedback!!
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 Posted 03/05/2018  10:33 am  Show Profile   Bookmark this reply Add chafemasterj to your friends list
Thanks for an informative thread.
Check out my counterstamped Lincoln Cent collection:
http://goccf.com/t/303507
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 Posted 06/22/2018  3:46 pm  Show Profile   Bookmark this reply Add mycrookedd to your friends list
While CRH today found a 1986 S Nickel (proof)

My first proof coin ever CRH.

For a proof in circulation it looks really good
no dings or scratches.

However in the field where you can see
the most luster. There is a fine coat of what looks
to be a tar substance like cigarette smoke residue.

My heart says never to clean coins. However my mind
says the continued damage of leaving this tar on the
coin is worse.

Could I use H2O2 with a bath of H2O to remove tar?
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 Posted 06/22/2018  5:14 pm  Show Profile   Bookmark this reply Add tdziemia to your friends list
I am not an expert on cleaning coins, but based on chemical principles. the best substance for removing "tar" without reacting with the coin's surface would likely be an organic solvent like mineral spirits, or a commercial product like Goo Gone which is designed to remove grease... These would have a chance to dissolve the tar.

If your coin is a proof, you'll need to take extreme care not to damage the finish (I am guessing most collectors would say to leave the coin alone because of the risk of causing more harm than good.).


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 Posted 06/22/2018  5:57 pm  Show Profile   Bookmark this reply Add tdziemia to your friends list
Responding to a question way upthread:


Quote:
Does anyone use mineral oil to soak? I've been told that olive oil, being organic, will decompose over time and the acids will damage over long periods


Mineral oil has a deceptive name. It is also an organic substance. It's related to substances like gasoline, differing only in the size of the molecules, which contain only carbon and hydrogen. If you use it on a coin, it can dissolve things (grease), but is non-reactive.

Olive oil has a different composition. Part of the molecules behave like the mineral oil, and can dissolve things like grease. But it also has a very mildly acidic character, and this is probably what allows it to act on corrosion or ancient deposits.
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 Posted 06/22/2018  7:00 pm  Show Profile   Bookmark this reply Add BStrauss3 to your friends list
Follow the polarity ladder on your proof.

http://goccf.com/t/57008#447106

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 Posted 06/22/2018  7:58 pm  Show Profile   Bookmark this reply Add fistfulladirt to your friends list
Hate to beat this one, but olive oil is the worst on coppers. Dark Vader!
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 Posted 06/22/2018  8:56 pm  Show Profile   Bookmark this reply Add mikem007 to your friends list
Cleaning your coins is your preference but when it comes to coins you want graded, well, in about two weeks I'm going to find out the hard way as that is when I get my next set of coins back from PCGS. I have done acetone dip with success and great results, undetectable. However, this time round I had a few coins that needed a little more effort and chose acetone with a light brushing using a fine tipped artists brush. Under 10x magnification, I can see the areas of the coin surface that I had lightly brushed.
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 Posted 06/27/2018  5:07 pm  Show Profile   Bookmark this reply Add SawtoothJack to your friends list
How long would you recommend leaving pennies in the Hydrogen Peroxide?
While we're on the subject, how long for ancients as well? Also, what do you do with the ancients immediately after you take them out?
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