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 Replies: 30 / Views: 2,456 |
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Pillar of the Community
United States
4541 Posts |
how long would you let a Lincoln Cent sit in acetone before taking it out and patting it down. I had a little gunk on some of my WAMS! |
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Moderator
 United States
16677 Posts |
BadThad is the real expert. I have been experimenting with timed soaks and I feel 3-4 hours will either get rid of the grime, or it won't. I would try that first.
swcoin.ecrater.com
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Pillar of the Community
 United States
4541 Posts |
i have had them soaking for at least that long. I checked the grim was still there
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Moderator
United States
16677 Posts |
I have a few Lincoln Cents that I have soaked in Acetone and Xylene and has done nothing to the grime  I don't know what to try now. swcoin.ecrater.com
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Pillar of the Community
United States
1179 Posts |
I rarely get any good results from acetone. I try all the time, but nothing drastic. I've soaked for an hour, a day, you name it. I think if it doesn't come off after 2 hours, it will never.
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Moderator
United States
23522 Posts |
Quote:
I have been experimenting with timed soaks and I feel 3-4 hours will either get rid of the grime, or it won't. I would try that first. As I type this post, I have this one in acetone:  The stuff around the leg and between the E and N is my primary focus. I grow roses, so I have a ready supply of thorns, and one would not budge any of the crud when I first tried. The initial soak in acetone, about 3 hours, loosened it somewhat; I was able to thorn-away a good portion of it. It's in fresh acetone now, will sit overnight, and I'll work on it in the morning. |
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Moderator
Australia
16810 Posts |
Quote:
ceaton said:
I rarely get any good results from acetone. I try all the time, but nothing drastic. I've soaked for an hour, a day, you name it. I think if it doesn't come off after 2 hours, it will never.  I'd say that if acetone doesn't at least start to shift it in two minutes, acetone isn't going to help. If you've got a syringe or eyedropper that can squirt a jet of solvent at the coin's surface, that can speed things along nicely, too. Acetone is great stuff for getting rid of "grime", but it depends entirely on what the "grime" is. If the goo is biological or petrochemical-based, acetone works pretty good. If it's corrosion, oxidation or anything mineral-based, acetone will leave it alone. 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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Valued Member
Australia
125 Posts |
vermontensium wrote: Quote:
I have a few Lincoln Cents that I have soaked in Acetone and Xylene and has done nothing to the grime. I don't know what to try now. You could try alcohol mate... And if nothing else, soon you'll care very little about a teensy bit of grime. hic!  But more seriously, and as Sap suggests, 'grime' can be almost anything you can imagine and so often warrants trial-and-error tactics - but with much caution. Once I used mineral turps on a 1925 silver coin found beneath floorboards, to remove what looked almost like paint, and with some gentle prods with a toothpick suddenly all this 'gunk' began lifting. And can only guess the substance probably was paint, and coin was likely lost by a workman at the time the house was being built, as the soon shiny 'three-pence' was about in EF(XF). Cheers,
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Moderator
United States
16677 Posts |
Quote:
As I type this post, I have this one in acetone:
Super, that coin is awesome! I love the red highlights I can see where you would like to get rid of the grime in the leg area. Your eye kind of draws down to that. Thorns? What a great tool to use. I don't have thorns, but, the city garden does! Or, a sharp toothpick may work. Quote:
You could try alcohol mate Thanks Goodasgold! And yes, I agree other methods should be tried with extreme caution. I would suggest, as I have done in the past, using a trial coin. I have ready supply of common Wheaties with grime and such, and I have been experimenting with those in different solutions. swcoin.ecrater.com
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Pillar of the Community
United States
2669 Posts |
I was doing that as well (experimenting) but kept forgetting about the coins sitting in the soup! So now I have some really wild-colored test coins that are only slightly less gunky....  |
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Pillar of the Community
United States
7840 Posts |
Dave,
My daughter was peering over my shoulder and she liked the looks of the 2 Cent piece with the Lion (she really likes critters and such). Would you please identify the piece so that I may be able to acquire one (maybe not as nice) for her?
success,
Edited by oih82w8
04/19/2009 12:04 pm
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Pillar of the Community
United States
615 Posts |
If you soak it with acetone one time, then it isn't going to dissolve off. (You might can physical work it off assuming it loosen it up) I guess you could try diethyl ether which is nonpolar, but I highly doubt you have some nonpolar "grime" that the acetone didn't dissolve off it. I assume you have used water, which is polar. Acetone is polar, but has a lot of nonpolar traits due to the methyl groups. See below:
O
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H3C-C-CH3
Like Dissolves like, but acetone likes to dissolve pretty much everything.
In organic chemistry lab... they pretty much use acetone to dissolve/clean out every beaker/test tube before dropping it into the bath.
=SFWUSC
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Bedrock of the Community
United States
20753 Posts |
  Photo one is of coins placed in a glass jar of Acetone. About 5 days later I removed those coins and placed them on the same service, not rinsed and hopefully in the same general layout. I've done similar experiments with Acetone, Xylene, Alcohol, etc many, many times and basically similar results. Quote:
In organic chemistry lab... they pretty much use acetone to dissolve/clean out every beaker/test tube before dropping it into the bath.
=SFWUSC Interesting. At our college's chem labs that would never be allowed due to safety purposes. |
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Moderator
United States
23522 Posts |
Quote:
Would you please identify the piece so that I may be able to acquire one (maybe not as nice) for her?
1859 Belgium 2 Centimes:  I (maybe over-) paid ~$70 for it; they're not impossible to find. The 1 Centime has the same basic design, as well. |
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Bedrock of the Community
United States
20753 Posts |
SuperDave: Kind of a really neat looking coin. Difficult to know how large it is from the photo. How big is that one? Some really interesting designing.
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Pillar of the Community
United States
615 Posts |
Just Carl,
Yea, I help out in the prep room some (sucking up for a LOR for Medical School). I can't recall the base that is used in the bath, but acetone is used to clean out stuff. (I bought 95% acetone nail polish remover for my apartment thanks to its cleaning power) I mean in my lab we never used anything that I would say was real dangerous. I was scared of the Pyridine...as we were told it wasn't to helpful for the male reproductive system. I let my lab partner mess with it as SHE didn't have to worry about it so much. :)
I have been in the prep room before when the acid waste "jug" started releasing a nice brownish bromine cloud...thankful it was under the hood.
-SFWUSC
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Replies: 30 / Views: 2,456 |
Posted 04/18/2009 8:29 pm
