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 Replies: 19 / Views: 10,351 |
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Pillar of the Community
United States
860 Posts |
Two Possibilities, which were mentioned above, You may be seeing the thin layer of permanent corrosion which might need some dipping substance to remove, or it might just need more acetone, but I rather doubt it, as usually it does a complete job of what it can do. My question is about the part you say Quote:
All the green appeared to have been removed and I rinsed off the coin. did you rinse the coin first with clean acetone solution before rinsing with water? If you blotted the coin with a q-tip, the acetone/pvc solution could have quickly flashed, leaving the lesser concentration of pvc back on the surface. When I use acetone soak, I then stand the coin on end, or hold upright and rise it with clean acetone, and then if one wishes distilled water, but I prefer not to do that unless I have lab grade distilled water. This clean acetone vertical rinse is very needed for Proofs or PL surfaces also. Jim |
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Valued Member
 United States
170 Posts |
I have some glass bowls in which I pour some acetone then place the coin in. I let the coin soak for a while then swish the acetone around and used the qtip to loosen more. At that time all the green was gone, at least using no magnification. I then take the coin and rinse it in another bowl with clean acetone.
I am doing this out in my garage and when I took the coin inside and looked at it with my Lupe I could see green. It is mostly at the edge of the coin but also some on her cheek where it was heavily spotted.
I did repeat the process with more success, at this time I can only see a small amount of green at a few areas close to the edge.
I believe that I am just being overly careful with using the qtip. Tomorrow I will take a picture and post it showing what remains.
I greatly appreciate all the information and support. By the time I finish with all these coins I should be a pro at this!
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Pillar of the Community
United States
830 Posts |
Keep dipping it in acetone, and maybe try to get a small soft camel's hair brush (like artist's paintbrushes) and use that instead of the Q-tip. Keep the brush clean by constantly rinsing it in new acetone. I've had great results doing that.
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Pillar of the Community
United States
2540 Posts |
Just a thought, last week I noticed a PVC's coin in a holder of mine.
I didn't have acetone, but dipped it in rubbing alcohol.
It took all of the PVC off immediately.
Anyone else try this?
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Bedrock of the Community
United States
20753 Posts |
I assume you do change the Acetone. Remember that Acetone absorbs that grees stuff and it is now in suspension in the Acetone. Redipping in the same Acetone is like taking a bath in dirty water. Yes you can get most of the dirt off your body but there is still dirt left from the dirty water you started with. Same with the Acetone. If you've used some, discard and redip in a new batch. Do not reuse the same on any coins. Attempt not to use Qtips or anything else unless your really carefull. Try rinsing with distilled water between each dip in the Acetone.
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Rest in Peace
United States
9104 Posts |
You can safely boil coins in acetone. Boil some water in a bowl, put another bowl with acetone in the hot water after removing it from the heat, cover the acetone with a plate to prevent evaporation.
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Bedrock of the Community
United States
20753 Posts |
Quote:
You can safely boil coins in acetone. Boil some water in a bowl, put another bowl with acetone in the hot water after removing it from the heat, cover the acetone with a plate to prevent evaporation.
I would suggest not posting things like this. Try to remember there are numerous differnt ages and types of people on this forum. The younger ones might attempt this without knowing how volitile Acetone is and over a stove such heating is dangerous. Also, note the details left out such as not using metalic containers for the Acetone. Having a really good fan exhaust hood over that burner on the stove. Wearing safety glasses. The necessity of protective gloves and the type of instruments to be used for handling the coins. Some or many may well be aware of all this but every day there are many new, younger, excessively older individuals joining forums like this for the first time. |
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Pillar of the Community
United States
2669 Posts |
I'm interested in the rubbing alcohol question - anyone else ever tried that? I have some coins in the same state as the one pictured and soaking in acetone for days hasn't helped much.
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Moderator
 United States
23522 Posts |
Quote:
I'm interested in the rubbing alcohol question - anyone else ever tried that? I have some coins in the same state as the one pictured and soaking in acetone for days hasn't helped much. Alcohol is a less-optimum solution for PVC than acetone - although isopropyl alcohol will soften PVC, I don't know how effective it would be at removing the bled vinyl chloride which is the actual cause of the residue we love to hate. Give it a shot - it won't hurt the coins - but I'm thinking if acetone won't do it, you're in a world of hurt. If the "infestation" is serious enough, you'll be wanting to change the solution frequently - as much as every hour in the first few hours - and swish the coin around prior to moving to the new solution. |
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Valued Member
United States
170 Posts |
Someone mentioned using the least hazardous material so I tried alcohol. It didn't work at all so I went back to acetone. As mentioned above, cover the glass bowl with another piece of glass to slow down evaporation and soak the coin for quite some time. I was surprised by the number of coins that I would check afterwards under magnification and find small pin head size green dots. On those I would just start the process over again. Some are easy.....some are not!
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Pillar of the Community
United States
6394 Posts |
I wouldn't recommend rubbing alcohol because some brands contain non-volatile additives that will remain on the coin after the soak. I would stick with acetone.
One suggestion: if you use a straight-sided glass for the acetone soak, you can cover it tightly with aluminum foil and use a heavy rubber band to seal the foil against the outside of the glass. With this arrangement you can continue the soak for days and the acetone won't evaporate. Whenever you are ready, take out the coin and give it a final rinse using fresh acetone.
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Bedrock of the Community
United States
20753 Posts |
Quote:
Does this sound like a workable plan? Suggestions would be appreciated before I start this, the coins are not mine and I am extremely worried about ruining the coins.
Thanks,
Glen
Now here is an OOPPPPS. I think everyone here missed this statement. Those coins are not yours? Mine saying just who's they are? My suggestion is to explain the methods mentioned here to whoever owns those and let them play around. Regardless of what you do, good or bad, if those coins are devalued due to your attempts, it's your fault. Of course this really depends on who's coins those are. If a relative, and you mess them up, not real good for the future. If a neighbor, may loose them as as freind. If a friend, same as a neighbor. In other words you may loose no matter what playing with other people's property. I keep away from excessive helping others when the results may endanger our relationship. Help by possibly printing out this forums solutions. Then walk away. |
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Bedrock of the Community
United States
10284 Posts |
Carl CONGRATS on 3000 posts!
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Pillar of the Community
United States
1571 Posts |
Referring to someone else's coins, I wouold just say no! Even if you warn them, that if the coin is harmed in any manner, you will LOSE, even if they say, "No problem"! They will blame you!
Dick
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Bedrock of the Community
United States
20753 Posts |
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Carl CONGRATS on 3000 posts!
Hey never noticed. Thanks. And to just say this one more time, when you do things for others, regardless of who they are, and you in any way damage that item, you will always be blamed. You may or may not hear about it but many others will. Things like "I had a coin worth a lot of money, but xxxx ruined it for me" No just not worth the problems. Think of it as if you borrowed someone's car. Prior to returning it, you filled the gas tank, had the oil changed, washed and waxed. Now due to that cleaning, a large scratch shows up. Could have been there all the time but your cleaning now makes it stand out. Guess what the owner will say? |
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Replies: 19 / Views: 10,351 |
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Posted 11/17/2008 11:57 pm
