Acetone

Sounds like someone is exagerating by about

Speaking of zillions,

A man is reading a newspaper and one of the headlines reads: "An airplane crash in South America. Two Brazilian pilots are killed!". A woman sitting next to the man asks, excuse me, sir, how many is a brazilian?

I actually had trouble with copper coins whether you like it or not.

It might be because of some residues that was on the copper coin originally which violently reacted to acetone, leaving behind some ugly toning.

I try to clean a IHC and also LWC killed my coins takes out the luster plus changed the color , I ll never use ing copper again .

Indeed. I think in a lot of these reported cases there was an artificial colorant or other residue that was removed to reveal the true surfaces.

I've used lab grade acetone on thousands of copper coins without ill-effect. I've even soaked a few for weeks to try to replicate the reported "bad results" and nothing happened. I know Carl has done it too and has gone so far as to place the coins in the sun while they're soaking.

That is an easy one. Just go to any store and pick a bottle of fingernail polish remover and read the lable. More STUFF in that bottle that most people can't even pronounce. It is for women's nails, not coins.


I wrote that one down.

In the past I've had a few sort of bad experiences with over soaking of coins in Acetone. And as already noted it could and probably did occure due to several reasons.
1. The purity of the Acetone was not as pure as it should have been.
2. Excessive dust in the air settled on the Acetone if and when the lid was left off.
3. The glass jar this was in was not as clean as it should have been for experimentation purposes.
4. And now here is one possible problem that people never think about. The glass itself dissolves into the Acetone.
For this one you just remember there are numerous types of glass on the market today. So many of our labs are restricted to Pyrex or similar types of glass. Yet glass itself is not really such a great solid as people think. Some glass products actually sag due to lack of solidity.
I always remember in a chem class it was discussed how way back a scientist attempted to make the purest water possible at that time. He did many distilling steps and finally enclossed his sample in a very, very claen jar and sealed the top and all with glass. This now is in a museum somewhere. The water is now all cloudy. Due to the water being so pure, it just had to dissolve some of the glass.
Water is one of the worlds greatest substances for absorbing almost anything.
Would be interesting to see if Acetone would also dissolve glass over a long, long period of time.
As noted in Wikepedia: