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 Replies: 25 / Views: 7,933 |
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Valued Member
Canada
90 Posts |
1 received 8 European coins today, they've been taped in a photo album for 18 years. I removed the tape but some residue remains. What's my next step?   Edited by Crjenkins
04/08/2016 2:09 pm
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Valued Member
United States
221 Posts |
You could try a 10 minute bath of acetone on each side of the coin? It should remove the tape residue but preserve the coin (*it will not clean the coin*). Make sure the acetone is pure acetone, as some has other chemicals in it that will destroy the coin.
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Valued Member
 Canada
90 Posts |
Thanks CRHer. I've never done a acetone bath, is it considered cleaning the coin
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Pillar of the Community
United States
992 Posts |
It is cleaning the coin surface, but it's not considered as cleaning the coin, so is acceptable.
The secret is to use pure acetone, and not to rub the surface. You can pat dry if you want, but no sideways movement across the coin.
These are good examples to learn how to do this, as they are inexpensive modern coins with no real collector value.
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Pillar of the Community
Canada
3049 Posts |
no need to pat dry
acetone will completely evaporate....
Acetone bath, then give a rinse with.. you guessed it clean acetone.. let it stand to try and you're good.
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Pillar of the Community
United States
7390 Posts |
Yes, soak in acetone in a small glass bowl or jar in the bathroom for 10 mins to an hour or so should do it (keep the bathroom fan on) then take it out and hold by the edges over the sink and pour clean acetone from the bottle over one side then flip your wrist and rinse the other side. Then set the coin down.on a folded piece of toilet paper for about 15 seconds to dry... voila!
Edited by Cascade
04/07/2016 8:27 pm
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Pillar of the Community
Canada
3049 Posts |
I don't put the coin on toilet paper....
I put a funnel into a glass to hold the funnel up... place the coin into the funnel so that neither the obverse or reverse lay flat but just the rim of the coin will contact the funnel..
When using handling the coins and acetone I always use blue nitrile gloves
rinse the coin... set it in the funnel give about 5 min to dry... and then it goes from funnel to 2x2 flip carefully and I don't even touch the coin at all.
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Pillar of the Community
United States
800 Posts |
It just so happens that this happened to me a couple of weeks ago. I laid the coin on my workbench and put a drop of Goo Gone on the sticky face for about a day. It worked for me but try it on one coin and if you are happy with the results continue with the rest.  |
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Valued Member
Canada
90 Posts |
Thanks people, I'm new and I don't mind admitting it, I wanta learn how to do these things correctly, instead of doin something stupid.
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Pillar of the Community
Canada
3049 Posts |
acetone will have no issues... the goo gone... I'm not so sure... I don't know enough about chemistry and metalurgy to know if this is safe or if it would come back in a TPG body bag.. |
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Pillar of the Community
United States
5825 Posts |
Acetone will NOT harm coins.
But don't use nail polish remover because there are other harmful ingredients in it.
And, NO, the use of acetone is NOT considered cleaning coins since it does NOT change coins in any way.
It just removes debris and other crud from a coin.
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New Member
Canada
34 Posts |
AgCoinAu and Cascade
I know letting the acetone evaporate is pretty standard for some. However, I was once told by a museum conservator that after an acetone bath metal should be rinsed with distilled water. The reasoning, as I understood it, Is that the evaporative process will leave a residual on the metal surface (very minor though it may be). The distilled water removes all residue.
Have you ever experienced a later problem like spotting or anything unexplained? By the way, I thought the funnel was clever.
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Bedrock of the Community
United States
20753 Posts |
 Quote:
I know letting the acetone evaporate is pretty standard for some. However, I was once told by a museum conservator that after an acetone bath metal should be rinsed with distilled water. The reasoning, as I understood it, Is that the evaporative process will leave a residual on the metal surface (very minor though it may be). The distilled water removes all residue. First of all, partially true. By that I mean what is dissolved in the Acetone will redeposit on the coins as the Acetone evaporates. Some people try the distilled water to get rid of that residue. IF you simply re-rinse with new Acetone, similar results. Any possible residue will or should now be gone. Since distilled water does not evaporate fast, you would have to pat the coins with something to absorb excess water. This could actually leave something else on the coins. |
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Rest in Peace
United States
4078 Posts |
 Skip the distilled water. Do the pure acetone soak then rinse with fresh acetone. |
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Valued Member
Canada
90 Posts |
I did 20 min+ acetone soak, I couldn't find anything on the bottle that said pure, I bought it at home hardware. Used a funnel to give it a fresh acetone rinse. The loose tape & residue came off, but there still a layer on the coins. Running them through another bath
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Valued Member
Canada
90 Posts |
Same coins after going through 2 acetone baths & 2 acetone rinses I've added this pic to my original post for comparison  Edited by Crjenkins
04/08/2016 2:11 pm
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Replies: 25 / Views: 7,933 |
Posted 04/07/2016 7:15 pm
