| Author |
 Replies: 25 / Views: 7,936 |
Page 2 of 2
|
|
|
|
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.
|
|
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. |
|
Rest in Peace
United States
4078 Posts |
 Skip the distilled water. Do the pure acetone soak then rinse with fresh acetone. |
|
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
|
|
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
|
|
Valued Member
Germany
303 Posts |
Looks like you gotta repeat the procedure a couple of times...
Best
|
|
Bedrock of the Community
United States
12437 Posts |
Acetone will remove the adhesive residue but there could also be corrosion issues and patination changes under the tape that are completely unrelated to the use of acetone.
|
|
Valued Member
Canada
90 Posts |
They were taped in a photo album for about 18 years, using medical tape
|
|
Moderator
 United States
188952 Posts |
That would explain it. That is a lot of time to affect the coins. For what it is worth, they look better after their baths.  |
|
Valued Member
Canada
90 Posts |
I already have these currencies in my OFEC collection, so if they don't come any cleaner I'm ok with it. My goal is to get OFEC but most of the places I keep more than one, I like to be able to see the variety in a countries currency. All of my OFEC collection so far as been given to me by friends & family, I like this option over buying because it creates a interest for others in what I'm doing, I've been given 91 currencies so far.
Most of the coins have been in decent shape, these are the worst so far. Tape & coins do not go together.
|
|
Pillar of the Community
United States
7390 Posts |
Quote:
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. Yes, if you just take the coin out of the acetone and let it dry then the stuff that was dissolved by the acetone will redeposit on the coin. ALWAYS do a final rinse. Thus can be distilled water BUT fresh acetone straight from the bottle is better. It reduces dry time and makes sure that film layer us completely gone. So, distilled water can be used as the final rinse but fresh, clean acetone is a better final rinse  |
|
Pillar of the Community
United States
1247 Posts |
all you need to look for is a bottle that says 100% acetone. any local CVS will have it in stock.
What you can try is soaking in acetone, you can use a q-tip or toothpick to rub the service, they won't damage the coin.
Then clean with fresh acetone, after the first bath.
|
|
Bedrock of the Community
United States
19963 Posts |
The problem with jumping directly to acetone is that you cannot figure out the nature of the residue. It could be polar or non-polar residue so finding the appropriate solvent to dissolve is necessary. I always recommend following the Polarity Ladder: http://www.lincolncentforum.com/for...Conservation |
|
Pillar of the Community
United States
1247 Posts |
I would echo what BadThad has said, as he is the resident expert on this kind of topic.
|
|
Valued Member
Canada
90 Posts |
Thanks BadThad, I checked out your link. I'll try again using your suggestions
|
|
Page 2 of 2
|
Replies: 25 / Views: 7,936 |
Page 2 of 2
|
First Page
Posted 04/08/2016 11:49 am
