Ultra Sonic water cleaners, are they safe?

[JAC]

Is it safe to clean jewlery and coins with one of the ultra sonic water cleaners with no chemicals, for caked on dirt and crud coins and such, found in the ground? Thanks ahead,
J.

 

[hoser]

I would guess if you are only using warm soapy water it will be fine. Not much different than using boiling hydrogen peroxide.

 

[EmuDetector]

Ultra sonic cleaners are great. I have a small one I use for my gun parts and small things. Never was too great on my coins I dug though.

 

[stetam]

They work well on cleaning dirt from tiny crevices in jewelry as your final cleaning, but are worthless on coins. Better to use a toothbrush.

Steve

 

[Pete e]

Don't put lead items in them, as they will pit very quickly...

 

[cellrdwellr]

Yes these are more designed for light soil/dirt removal on already somewhat clean objects. Ive tried cleaning alot of different things, its just not a very abrasive method. For tougher jobs I'd use a tumbler or electrolysis.

 

[hoser]

We had a fairly large one where I worked that the instrumentation techs would use for cleaning emissions instruments that got caked up with stack gasses, (OSB plant) I used to take vintage clock movements in and run them through the cleaner. Worked awesome for that. I do agree that the crud on a coin would require a more aggressive approach.