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Replies: 23 / Views: 1,719 |
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Pillar of the Community
  United States
6505 Posts |
Quite the array of containers and extractors! I am a little surprised at how many of you guys use your fingers to extract coins. How do you avoid getting little partial fingerprints near the edge?
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Pillar of the Community
 United States
6557 Posts |
Quote: How do you avoid getting little partial fingerprints near the edge? Pretty sure fingerprints, come from the oil in your skin. Acetone takes care of that. Put your fingers in some, you'll see.
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Moderator
 United States
188513 Posts |
Quote: Pretty sure fingerprints, come from the oil in your skin. Acetone takes care of that. Put your fingers in some, you'll see. This, plus, handling by the edge helps. I really dislike tongs, gloves, anything that gets in the way. I am a klutz. I do not want to add anything to help that along.  Also, did I mention that I moisturize? Dermal exposure to acetone makes it mandatory. 
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Valued Member
Italy
284 Posts |
I feel it would be beneficial to remind the future readers that handling bare hands or with tools is also a matter of frequency with acetone. Doing it once in a while it's not an issue but repeated exposure might be harmful! Plus, always allow for good ventilation (or just use it outdoors)! Stay safe! 
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Pillar of the Community
 United States
4592 Posts |
Throw a couple of glass marbles in the bottom of the glass dish, shot glass, whatever, so you don't have the coin happen to land flat to the bottom or side. Makes it much easier to fish out with bare fingers or nitrile gloves.
-----Burton 50+ year / Life / Emeritus ANA member (joined 12/1/1973) Life member: Numismatics International, CONECA Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club Owned by three cats and a wife of 40+ years (joined 1983) Author: 3rd Edition of the Sample Slabs book, https://www.sampleslabs.info/
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Moderator
 United States
188513 Posts |
Quote: Plus, always allow for good ventilation (or just use it outdoors)! To answer the inevitable question... Back patio. 
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Moderator
 United States
188513 Posts |
Quote: Throw a couple of glass marbles in the bottom of the glass dish, shot glass, whatever, so you don't have the coin happen to land flat to the bottom or side. Makes it much easier to fish out with bare fingers or nitrile gloves. Not a bad idea. 
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Pillar of the Community
United States
2520 Posts |
Quote: I use a small glass bowl for the soak and my fingers for removal. Have to admit I've done that for many years, and still do for a single coin. Bamboo tongs are for many coins and lot of soaking....
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Pillar of the Community
United States
7034 Posts |
Quote: How do you avoid getting little partial fingerprints near the edge? Just before coin extraction I wash my hands real well and dry with a fresh towel. Plus I think I have pretty thin fingers....compared to most other people. What... 10 + years of doing this and I haven't seen any prints left on coins.
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Pillar of the Community
United States
573 Posts |
Don't laugh, but I use urine specimen containers. I bought a batch of 6 on ebay and find them to be the perfect size for anywhere from 1 to 10 coins depending on size (of the coins). Big benefit is that they have leak proof lids, which means no acetone fumes.
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Pillar of the Community
United States
619 Posts |
The first time I considered trying Acetone, I went looking for thread like this. I ended up experimenting, trial and error.
I use those little white "antique" pond creme jars that I found while bottle hunting. Minimize waste of acetone by going as small as possible. Place something over the jar to slow the evaporation. Do it in the patio where there is plenty of ventilation. Thank you to all who contributed their tips.
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Valued Member
United States
117 Posts |
Thank you posting this. I haven't been happy with the containers I'm using.
It makes sense to find something to keep the coin at an angle so you hit more surface area.
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Moderator
 Australia
16829 Posts |
Gloves: Don't use nitrile gloves, unless the nitrile rubber they're made of is different from the nitrile rubber in the gloves at my lab. Those things dissolve in acetone pretty quick. Please test it first before starting off with any coins, and if the gloves disintegrate or get sticky, don't use them with acetone.
Container: anything glass or ceramic that you're not planning to use for human consumption afterwards. Lids are redundant for me as a soak never lasts more than a minute.
Grabber: fingies for me too. I don't trust any gloves not to be acetone-soluble, and I don't trust tongs to not scratch the coins (if made of metal) or be acetone-soluble (if coated with some kind of plastic or rubber).
Location: would seriously recommend not doing it in a regular basement, or anywhere else that's poorly ventilated. If you wouldn;t slosh gasoline around int he same space, don;t use acetone there. If you've got some kind of fume/dust extraction, or even just a good flow-through fan and plenty of open windows, it's not an issue. I always use the bathroom, with the ceiling ventilation switched on.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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Pillar of the Community
 United States
5029 Posts |
small glass pinch bowl and fingers. I do my soaks in the garage. I do not usually soak more than a few minutes. If something needs a longer bath than I put a glass window pane over the dish to slow evaporation.
Edited by scopru 11/24/2025 07:18 am
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Pillar of the Community
 United States
4592 Posts |
I once had one of those painted ASEs.
I ended up using a Pampered Chef glass bowl with a lid and the marbles.
It took a year in acetone (changed it every couple of months and did some agitation) to finally get the last bits off.
-----Burton 50+ year / Life / Emeritus ANA member (joined 12/1/1973) Life member: Numismatics International, CONECA Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club Owned by three cats and a wife of 40+ years (joined 1983) Author: 3rd Edition of the Sample Slabs book, https://www.sampleslabs.info/
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