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 Replies: 33 / Views: 3,158 |
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Pillar of the Community
 United States
623 Posts |
Jimbucks...you're saying PCGS cleaned up that Barber half with acetone?
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Pillar of the Community
United States
623 Posts |
So, rinse the coin with distilled water after the acetone soak?
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Pillar of the Community
968 Posts |
Dish soap? Let it dry? Oof. lol. Quote:
Residue in acetone WILL redeposit....I've seen it happen. You really need to rinse after an acetone dip. I am experienced! I've dipped hundreds of coins, many of which have later graded problem free. I am not exactly an idiot or an inexperienced newbie. I've been around the block a couple times. Don't rinse it with distilled water, I don't care what JimBucks says. If he's seen acetone residue deposit on anything, it's because he wasn't using pure acetone. That simple. I actually check my acetone before using it, and have never had a problem. Quote:
So, rinse the coin with distilled water after the acetone soak? No, if you use distilled water at all, it should be used prior to the acetone. Also, Jim probably has no idea what PCGS did with his Barber half unless he talked to them... and I was under the impression they don't share their methodology. Edited by chasingtailbar
08/07/2014 12:05 am
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Pillar of the Community
United States
4692 Posts |
I don't know how PCGS cleaned up my coin, they do not disclose their methods. My "methods" are that acetone typically results in similar results. I wasn't about to mess with this PCGS coin since it developed spots while in their holder and it is a high value coin. I have seen residue redeposit right in front if my eyes when acetone evaporates and is not rinsed.
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Pillar of the Community
United States
623 Posts |
The reason I used dish soap was to wash off the "dip." I didn't want it sitting there destroying the coin. The 1895 I will put into the acetone tomorrow night. This is the acetone I own: http://www.sallybeauty.com/Acetone-...tone&start=6100% pure. $2. ;-) |
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Pillar of the Community
968 Posts |
You've seen residue deposit... did you test your acetone to make sure it was pure acetone first?
Your acetone was probably contaminated somehow, that simple.
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Pillar of the Community
United States
623 Posts |
What would it hurt to rinse the coin with distilled water after an acetone dip?
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Pillar of the Community
968 Posts |
Quote:
The reason I used dish soap was to wash off the "dip." I didn't want it sitting there destroying the coin. Yeah, don't do that in the future. Dip, hot water, distilled water, acetone. That's all ya need. I've used this method and probably had an upwards of 200 coins slabbed problem-free afterwards. Edited by chasingtailbar
08/07/2014 12:14 am
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Pillar of the Community
968 Posts |
Quote:
What would it hurt to rinse the coin with distilled water after an acetone dip? Wouldn't hurt, but it's not going to do any good either since the distilled water doesn't evaporate quickly and any left on the surface may have particles of contaminants. That's the point of the soak in acetone. It dissolves organics, and provided it's 100% pure acetone, it evaporates quickly and completely. I use this stuff, or something very similar. http://www.homedepot.com/p/Klean-St...18/100141096 |
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Pillar of the Community
United States
623 Posts |
1 gallon of acetone...you must do a lot of soaking!
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Pillar of the Community
968 Posts |
I go through a gallon every year or so. Every acetone soak gets about 1oz per coin, minimum. I'd rather overcompensate than risk having all the crap that comes off the coin end up right back on it because it all evaporated for some reason.
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Pillar of the Community
United States
4692 Posts |
Back in the 1970s us "kids" used benzene. No gloves either. Well, after I got my chemical engineering degree in the 1980s if you don't want to wear gloves, acetone is the way to go!(plus it is harder to find benzene these days) If you are using soap, I suggest Dawn and always distilled water. No time to get into specifics.
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Pillar of the Community
United States
623 Posts |
LOL just messing with you! What do you soak your coins in? I am using a baby food jar...hoping it cuts down on the evaporation.
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Pillar of the Community
United States
4692 Posts |
Be sure to use the squished peas, they are less harsh than the applesauce baby food. And Gerber is the best, I remember that from over 50 years ago.
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Bedrock of the Community
United States
17884 Posts |
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Acetone evaporates, and if it's true 100% pure acetone, it doesn't leave anything behind. Not quite true. If there are contaminants dissolved in the acetone from the coin they can be redeposited right back on the coin as the acetone evaporates. This is why I do a through FLOWING rinse (not a soak) with distilled water to flush away all the contaminated acetone. Then I follow that with a quick flowing rinse with fresh acetone to dry the coin. (After the water rinse you should just have a few droplets of water on the coin. Water and acetone are "instantly" and 100% miscible. So the water molecules will be instantly widely disbursed in the acetone and they will evaporate off as the acetone does in just a few seconds. No need to do anything else to dry the coin and no chance to accidentally hairline it.) Quote:
The reason I used dish soap was to wash off the "dip." I didn't want it sitting there destroying the coin. Instead you probably leave residues from the soap, not much better. Edited by Conder101
08/07/2014 09:40 am
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Replies: 33 / Views: 3,158 |
First Page
Posted 08/06/2014 11:59 pm
