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Replies: 19 / Views: 35,442 |
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Bedrock of the Community
United States
20753 Posts |
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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Bedrock of the Community
United States
19948 Posts |
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.
Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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New Member
United States
6 Posts |
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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Moderator
 United States
188213 Posts |
 (At least you are asking good questions and not just bumping old threads to say "Cool!"  )
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Bedrock of the Community
United States
19948 Posts |
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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Bedrock of the Community
United States
20753 Posts |
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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New Member
United States
3 Posts |
Thanks for the great question and all of the feedback!!
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Pillar of the Community
 United States
6514 Posts |
Thanks for an informative thread. 
Check out my counterstamped Lincoln Cent collection: http://goccf.com/t/303507
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Valued Member
United States
59 Posts |
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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Pillar of the Community
 United States
7940 Posts |
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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Pillar of the Community
 United States
7940 Posts |
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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Pillar of the Community
 United States
4591 Posts |
-----Burton 50+ year / Life / Emeritus ANA member (joined 12/1/1973) Life member: Numismatics International, CONECA Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club Owned by three cats and a wife of 40+ years (joined 1983) Author: 3rd Edition of the Sample Slabs book, https://www.sampleslabs.info/
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Pillar of the Community
United States
4333 Posts |
Hate to beat this one, but olive oil is the worst on coppers. Dark Vader!
When I listen to LED ZEPPELIN...so do my neighbors... Roll hunting since '77 Dirt fishing since '72
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Valued Member
United States
318 Posts |
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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New Member
United States
37 Posts |
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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