Ultrasonic Cleaners

There was a thread about it earlier where the results were alright, any dirt was completely removed but any type of toning or reacted surfaces remained untouched.

A concern I would have is if the debris being removed masked the coin in any way. Once removed it could reveal an untoned (or toned differently) spot. Though if the coin has been in the ground for years/decades, I'm not sure it's a big deal.

I would think that unless the coin was suspended somehow that you could end up with friction 'burn' on where the coin was touching the tray.

I have one and used it on coins that have excessive crud on the it.




That comment I would agree with.




I do not see any issues with using a plastic tray to place the coin in its distilled water bath. Unless their exist photos to prove otherwise that a "burn" does happen to the coin.

I clean the coins for 30 minutes in distilled water. Let the ultrasonic cleaner cool down, I dry the coin on 100% cotton cloth, I then inspect the coin through a loupe, and change the distilled water, if another cleaning cycle is required. I would then turn the coin over and place it on the tray. Some people would recommend adding a little dish soap or a type of cleaning agent, I do not.

There are videos on coin cleaning with ultrasonic cleaners on youtube to remove the crude. You can see their results.

I believe I paid $46.00 for mine, with plastic basket and watch holder option.

Edited here: A great existing thread here on coin community displaying the before and after results,
https://goccf.com/t/194249