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 Replies: 33 / Views: 3,149 |
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Pillar of the Community
United States
623 Posts |
Back in August of last year I posted this topic on a Morgan/Peace dollar collage I created. https://goccf.com/t/155270I noticed one coin, the 1890 has some serious toning going on.  My 1895 now has 2 carbon? spots?  As you can see they are in air-tite holders. What could be causing this toning? Any help would be much appreciated!! |
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Pillar of the Community
United States
1002 Posts |
Usually an indication of an improper dip..
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Pillar of the Community
968 Posts |
That 1890 is junk, improperly rinsed dip. :( Sorry to be the bearer of bad news. The '95 probably had a contaminant get on the surface at some point, I'd pull it out and throw it in acetone.
EDIT: The '90 was already turning in your old thread, too bad nobody mentioned it.
Edited by chasingtailbar
08/06/2014 7:11 pm
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Pillar of the Community
 United States
623 Posts |
If I dip the 1890 in eZest how should it be properly rinsed? I do have pure acetone for the 1895...same question...how should it be rinsed if at all?
The 1890 is just a common coin so I don't care about dipping it. However, the 1895 I am ok with just acetone.
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Pillar of the Community
968 Posts |
If you want to dip the '90, I'd dilute the dip a bit if you're using a strong agent. I prefer ammonia for dipping to remove haze/toning/etc. I generally dip, wash under hot water for about 20 seconds, then rinse with distilled water, then soak in acetone for 24-48 hours. Works well enough for me.
No need to rinse coins coming out of an acetone bath.
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Pillar of the Community
United States
623 Posts |
On the 1895...will the acetone eat the spots off? I prefer not to have to rub the coin at all. Just soak, air dry, and put it back in the air-tite?
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Pillar of the Community
968 Posts |
It will remove whatever contaminants on the surface are causing them. As for actually removing the carbon spots? I'll let somebody else chime in, I don't have experience removing carbon spots from circulated coinage.
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Pillar of the Community
United States
1158 Posts |
I don't think you can remove carbon spots without an acid, which will do more harm than good. It's basically the silver equivalent of rust on steel.
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Pillar of the Community
968 Posts |
They can definitely be shrunk, if not eliminated entirely, I'm just not familiar with the techniques used by professional conservators.
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Pillar of the Community
United States
4692 Posts |
Acetone will not hurt. Use a Qtip with it and gently rub. Then rinse, acetone will redeposit, so rinse with distilled water. Keep doing it over and over until spots are gone.
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Pillar of the Community
968 Posts |
Acetone evaporates, and if it's true 100% pure acetone, it doesn't leave anything behind. It's silly to rinse it with anything. Here's a quick test to ensure you have pure acetone;
However, it is easy to test acetone for basic purity. One can place a small amount of acetone into a clear glass dish or a watch glass (a round piece of glass used for this purpose in chemistry), allow it to evaporate in a well-ventilated area that is free of any type of flame or spark (acetone is flammable), and then hold the glass dish over both a black surface and a white surface, to check if any light- or dark-colored residue is present on the glass.
Edited by chasingtailbar
08/06/2014 11:44 pm
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Pillar of the Community
United States
623 Posts |
The 1890 I just dipped and it cleaned up in seconds! I rinsed it and now it's sitting in pure acetone in a glass baby food jar. It is pure acetone...I bought it Sally's Beauty Supply.
I only have 1 jar so I am going to let the 1890 sit for a day. Then I am going to soak the 1895 and see what happens.
Please keep up on the tips...I really don't want to dip the 1895!
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Pillar of the Community
968 Posts |
I buy my acetone from Home Depot or Lowes. A gallon for like, $20. Lasts me about a year. And that stuff is bona-fide 100% pure.
Glad to hear the '90 was salvageable. Keep your eye on it, it may turn again and require another dip... an unfortunate reality when dealing with dip residue.
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Pillar of the Community
United States
4692 Posts |
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Pillar of the Community
United States
623 Posts |
Usually when I dip a Morgan I wash it with dish soap and rinse it off...let it dry. It's been over a year since I put the display together so I can't remember which were dipped and which weren't. The 1893 and 1895 are my biggest concerns since those are the key-dates.
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Pillar of the Community
United States
4692 Posts |
Residue in acetone WILL redeposit....I've seen it happen. You really need to rinse after an acetone dip. I am experienced!
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Replies: 33 / Views: 3,149 |
Posted 08/06/2014 7:10 pm
