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 Replies: 13 / Views: 17,290 |
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Pillar of the Community
United States
520 Posts |
Do you guys think its safe to use MS70 to clean coins? It is not a dip and typically is used to remove dirt, tape, and grime off of a coin. Is says it doesn't damage the surface of a coin at all. My local coin shop "The Coin Purse" in Nashville TN claims to use it on their coins and it just helps to present the coin better. All coins over time get tape, or oil, or something on them.
I guess cleaning is in the eyes of the beholder and opinion of the collector. Once again THIS IS NOT A DIP AND DOESN'T SHINE THE COIN OR HARM THE SURFACE!!
Please comment with your opinion on this?!?!
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Pillar of the Community
United States
1374 Posts |
Cleaning is a sin, but at least your dealer is honest.
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Pillar of the Community
United States
2150 Posts |
I've always heard it contains a mild soap. I would never use it but to each is own. I'm sure as the TPG's get more advanced they will all start using "sniffers" like PCGS does with secure plus and most of these coins that have been spruced up a bit will be kicked back. |
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Bedrock of the Community
United States
19930 Posts |
Never used it and never will. It's a detergent solution of some sort. I've heard people say it works fairly well but it can turn copper blue. IMO, it's always best to stick with the coin-safe solvents: water, acetone and xylene. For silver, acid-thiourea dips are fine with used CORRECTLY. And, with problem coins, VC is my choice of course.
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Pillar of the Community
United States
4132 Posts |
Given that it does crazy things to copper, I would be pretty wary about using it with other coin metals. If I want to remove tape or glue or oil, I use acetone.
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Pillar of the Community
 United States
520 Posts |
Ya I guess I will just get rid of that cleaner then. Just was told different things by different people. I dont like to alter the look of my coins, but do not mind using something that just removes the dirt, oil, etc from a coin.
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CCF Master Historian of USA Commemoratives
 United States
12250 Posts |
I have used MS-70 to very successfully remove PVC residue on several silver and nickel coins and medals in my collection. I still have all of the pieces on which it was used several years later and none of the coins/medals have shown any ill effects. When applied gently with a cotton swab and then thoroughly rinsed with clean water, it has proven to be a safe and effective solution. On the occasions when the coin was toned, MS-70 DID NOT remove the toning, just the surface contaminants.
I had heard of its effects on copper, so I experimented with a few "dirty" one-cent coins out of circulation. It does clean them, but it also does typically give them a bluish tone. I wouldn't use it on copper coins. From a metallurgic perspective, the properties of nickel and silver are different from copper, so issues with one metal do not necessarily translate to issues with all metals.
I've successfully used acetone as well, but continue to keep a bottle of MS-70 on hand for certain coins.
Hope getting the thoughts of an "actual user" helps!
Collecting history one coin or medal at a time! (c) commems. All rights reserved.
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Valued Member
Canada
220 Posts |
I've also used MS-70 for years, but never on copper/bronze coins. It does an awesome job of gently removing years of nasty caked on grime, tape residue, etc. And if some of the coins that I've used it on have come back slabbed from one of the top TPGs, then rest assured I'm going to continue using it (carefully & judiciously) to remove gunk from coins that would do more harm to the coin in the long run if left in place...
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New Member
United States
6 Posts |
I have used on copper but you must rinse it quickly! Do not coat it and let it dry on there. Q-tips are great. That is key to no color changes, rinse! It will not remove standard toning. But if you have a coin with cool toning I would stay away because I noticed it evened out my toning to all the same once rather than variations of toning. To me this is glorified soap and water with a kick and adds some shine. You really have to be dealing with MS coins to begin with. It is not going to work on really dirty beater coins. I did soak a junker steel penny just to see and it turned it black! Steel pennies are very sensitive to anything they seem to absorb anything you put on them! Dirty steel pennies can be cleaned with lemon juice and water diluted but you can not let it sit long at all. Must act quickly to remove and rise.
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Moderator
United States
187446 Posts |
 to the Community, beecha! |
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Rest in Peace
United States
18456 Posts |
Just a thought ; I wonder if greatsoutherncoin on ebay uses MS-70 on his coins .  |
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Pillar of the Community
United States
4211 Posts |
My LCS uses it all the time and regularly dips tarnished silver coins.
"A quick dip is not the same as cleaning a coin".
Many old school dealers and owners use it. Some admit to it freely.
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Pillar of the Community
United States
8715 Posts |
I think it's fine to use as long as you are careful and you don't leave it in the solution for too long.
I don't recommend you use it on copper coins.
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Pillar of the Community
United States
3402 Posts |
Ask yourself....Would I use MS70 on an MS70 coin? Would yah?
KK
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Replies: 13 / Views: 17,290 |
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Posted 05/12/2012 01:41 am
