If I clean a silver or gold coin with ultrasonic it can make damage to the coin? PCGS will grade this coin? Thank you.
It isn't clear to me whether or not ultrasonic cleaners do anything to coins. However, it's not a good idea to use it on a valuable uncirculated coin. I'd really like to get one and try it out on various coins.
I have a question: Why and how did you get red type and how did you get is so big? Also, why use that type face unless your house is on fire?
Ultrasonic Cleaners..... My wife has one for her jewelry. I have used it on wheats as an experiment. I really dont think it is a good idea on anything of value, I saw some color change. I just used hot water and a drop of liquid dish soap for 6 minutes.
It not a good idea unless you can somehow make metal suspend in water. The coin will be damages when it vibrates against a service.
If it has a plastic basket, you might be able to try it. I wouldn't use anything distilled water in it. Also, make sure to try it on pocket-change first.
Never clean a coin on your own unless you are absolutely sure of what you are doing, even if a it has unattractive surfaces. And given the question, you probably don't. PCGS, NGC and ANACS are very good at detecting cleaned coins. If determined to be cleaned PCGS and NGC will return the coin in a body bag. ANACS will grade it but "CLEANED" will appear on the label. If the coin is valuable go to http://www.ncscoin.com/, Numismatic Conservation Services. For a fee, they clean coins professionally. Otherwise just leave it alone. You'll never have a problem selling an original coin..........
I'm not sure how someone can ever become adept at cleaning unless they actually clean coins. It would be foolish to start with high valued coins, but it's sometimes fun to fool around with the cleaning process. It's one of the best ways to learn how to detect cleaned coins.
ultrasound I think ultrasonic really can damage a coin. But i won't regret if the coin doesn't have an inscription "in god we trust", like the U.S. silver dollar coin found in the article on this site: http://www.coinsdig.com/
Ultrasonic cleaners work. I think that's what professional cleaners use. Isn't it? I think I read somewhere they do. Just use distilled and make sure its not touching anything else. I figured out how to suspend coins in the tank. I've only cleaned coins I want to keep. Also a few that may be worth something DID NOT get cleaned. Ultrasonic is way better than any actual rubbing or Q-tip action. I wonder why so many people think cleaning is bad? A grading company will clean a coin before grading it, wouldn't they?
Whether or not they ever use that method I don't know, but dipping is the most common method and they use a variety of different ones for restoration depending on the coin. Because it lowers the value and many methods will ruin a coin. Restoration is a different story. No, they just grade them in the condition they were received in.
