Dipping Coin In Acetone - Coin Community Forum

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Author	Replies: 6 / Views: 612
Hunter611 Valued Member United States 338 Posts	Posted 01/03/2026 07:49 am I heard recently that dipping a silver coin in acetone can be picked up by TPGs and can result in a details designation. To limit the variables and what ifs, if an otherwise uncleaned coin is dipped in actetone and nothing else: 1) Does actetone leave a residue that can be picked up? 2) If true, how is acetone picked up on a coin that has been dipped in acteone and nothing else, what test is used? Edited by Hunter611 01/03/2026 07:49 am Report this Post to the Staff

Pertinax Pillar of the Community United Kingdom 2133 Posts	Posted 01/03/2026 08:11 am If pure acetone is used, I don't think TPGs can detect this, because there's no chemical reaction. However, if you use a tool to rub the coin, they might pick up rubbing marks or scratches. If the acetone isn't pure, it can leave a faint, cloudy white film as it dries. This can sometimes be wiped away with a soft cloth. Report this Post to the Staff
Zurie Pillar of the Community United States 5661 Posts	Posted 01/03/2026 09:16 am Pure acetone does not leave a residue when dried. If there was something on the coin that the acetone dissolved (like PVC), some residual might be left on the coin after drying, but a second rinse in acetone should eliminate that. Report this Post to the Staff
Hunter611 Valued Member United States 338 Posts	Posted 01/03/2026 09:38 am Thanks for the replies. That was my thinking as well, a double rinse to ensure residual is eliminated. Report this Post to the Staff
jbuck Moderator United States 187446 Posts	Posted 01/03/2026 1:31 pm Quote: some residual might be left on the coin after drying, but a second rinse in acetone should eliminate that. This. Always use a flowing rinse of fresh pure acetone after a soak. This will make sure nothing is left when it dries. DO NOT USE WATER! The acetone will evaporate fast, no need to pat or wipe dry—which can leave behind marks or contaminants. Coin Collector Since 1978 Avatar Old Avatar 7070 Eisenhower Australia Canada World CCF Members on eBay CCF eBay Search Engine Report this Post to the Staff
Dearborn Moderator United States 94636 Posts	Posted 01/03/2026 1:48 pm good point jbuck. Collecting since 1972. Learning from then on "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin 7070 type set coin count: 51/76 Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents Report this Post to the Staff
JohnConduitt Pillar of the Community United Kingdom 725 Posts	Posted 01/06/2026 2:20 pm I'd be surprised if a TPG marked a coin down for an acetone bath even if they could detect it. Plenty of cleaned coins do not get details designations - the TPGs clean coins themselves ('conservation'). I believe they are mainly looking for harsh cleaning or abrasion. Report this Post to the Staff
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