My Long Term Storage Procedure

acetone? what are you trying to do, clean your coins?

Sorry, I don't really know too much about this. I was just wondering what the purpose of it is. Any feedback would be greatly appreciated!
- Ben

Acetone will not remove fingerprints but it will remove the oils that could show as fingerprints months after encapsulatioZiggy

Very interesting. Mark

very systematic and professional, thanks

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So its perfectly alright to give a coin an acetone bath? Does it remove toning?

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In the opinion of this chemist, yes it is perfectly safe because acetone is an organic solvent so it will only remove organic material (dirt, finger grease, etc) and not disturb the surface of the metal. The only toning that I have seen removed by acetone is really bad AT but it will not touch NT.

Using acetone does not fall under the header of "cleaning" when cleaning is used to describe a harmful procedure that will damage a coin. Using acetone would be considered "conservation" and can potentially protect a coin from future or further environmental damage.

At the top of the page there is place that says SEARCH. I've never tried it but you could try typing in Acetone. Might find lots of post on that subject.
Some time back I heard so many statements of good and bad of Acetone, I tried several experiments both using comercial grade Acetone from Walmart and chemical grade from a chemical supply, School Lab. One web site stated leaving a Copper coin in Acetone in the sunlight would distroy the coin.
I took a clean glass beaker, chem lab type object, placed several coins in the beaker, added Acetone enough to cover the coins. Not sure anymore but I think there was an Wheat cent, Indian cent, Nickel, Liberty Head Dime, modern quarter. Again, can't remember exactly what the coins were. The beaker, covered, was in the dark for one day, in sunlight for one day. Coins removed, rinsed with distilled water. NOTHING, and I mean nothing happened to those coins. The Dime did appear a bit cleaner but no reaction to the other coins. Experiment repeated with both types of Acetone.

It sounds like you liberated all the same lab supplies from your employer that I did. I sense a similar chemist.

To someone's question, acetone is relatively safe, too. If you breathe too much it could make you sick, and something barely like drunk. It dries out the skin real bad (for the same reason it will partially remove fingerprints, depending on how long you soak).

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(quick, put the "d" in powder-free gloves)

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What? You don't own any power-free gloves? They help reduce global warming!