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 Replies: 11 / Views: 1,668 |
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New Member
United States
47 Posts |
So, I decided to go coin roll hunting and chose dollar coins as they don't seem to get hunted that often. My bank had some lose rolls (not in a box) and I decided to get a small amount. Every single roll they gave me had 1979 P Susan B. Anthony dollars (none were wide rim) and the paper on the rolls was turning yellow. These things must have been there for a while. AND every single SBA in all these rolls came out toned. I've never seen anything like this, but I haven't done this for very long. I plan to go back as I think they have more. Anyway, I took a few of these SBAs and put them in acetone, mostly to test results. However, blackish/grey spots appeared on some of these. Most came out fine. What exactly is going on here? Acetone reacted to something on the coin? Or is it toning itself? Here's a picture, it was hard to capture all the marks that appeared. But in this pic, it's the blob across the "R" in "liberty" (not the dots in her hair):  Edited by Nope
06/13/2020 4:51 pm
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Moderator
 United States
56855 Posts |
What brand/type of acetone did you use? How long in acetone? John1  |
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New Member
 United States
47 Posts |
It was Klean-Strip acetone. One SBA was in it for 2 hours, came out like that. Another was overnight. Same results. Gave them a second acetone bath just to see what would happen: that was a few hours. Came out the same. |
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Bedrock of the Community
United States
19134 Posts |
I like the toning. Please post a pic or two of pre-acetone SBAs. Would like to see the toning.
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New Member
United States
47 Posts |
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Bedrock of the Community
United States
19134 Posts |
I'd love to find a roll of those. Nice!
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Bedrock of the Community
United States
19935 Posts |
No need to do anything, I like seeing those in a toned state! Those last couple are beautiful IMO.
Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Pillar of the Community
United States
5770 Posts |
Nice score. In the last obverse image, what is the "open oval" below along the edge of her hair below her ear? Is it incuse from PMD or some kind of raised anomaly? I have seen discoloration (greenish-yellow) on one occasion to some light grease or oil that had dried on 1946s LWC. If you try soaking any again, try soaking for only a few minutes. Words of encouragement are one of the major food groups.
We need to consume them regularly to thrive and grow.
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New Member
United States
47 Posts |
Hmm, not sure what you mean about an open oval. I can't see it, or maybe I don't understand what you mean.
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Bedrock of the Community
United States
19935 Posts |
Missed the main question....lol Quote:
What exactly is going on here? Acetone reacted to something on the coin? Or is it toning itself? Acetone is non-reactive. However, it is excellent at dehydration. The black spots were there when you started, the acetone ripped away all the waters hydrating the residue changing its appearance. Or the spots were covered with toning/residue which was removed by the acetone to reveal the spots. Black residue can only be corrosion and/or surface debris. If you want to continue your experiment, try soaking in xylene next. If the black spots persist, they are corrosion based (primarily inorganic). Black, terminal corrosion can only be removed using aggressive means, i.e. acids/bases, that usually also destroy the collector value of any coin. GOOD LUCK! |
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Pillar of the Community
United States
992 Posts |
I call those the "Black spots of death". I've messed with coins that have this
and nothing worked for me. I was able to change the spots to white, but they
did not go away. I'd leave the toners as is, they look good to me!!
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Pillar of the Community
United States
5770 Posts |
I thought it looked like a hairpin. Here is your image with an arrow added.  Words of encouragement are one of the major food groups.
We need to consume them regularly to thrive and grow.
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Replies: 11 / Views: 1,668 |
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Posted 06/13/2020 4:54 pm
