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 Replies: 23 / Views: 4,159 |
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Valued Member
United States
212 Posts |
I got this from my LCS's foreign coin bin a while back. Figuring it's well past ruined as far as being taboo to clean, I did rub a little spot with an acetone-dipped q-tip, to see which was on the surface; the blue/violet or the brown. The brown gave way to blue underneath, and the blue didn't budge. So I don't think it's paint, unless it's some kind impervious to acetone. Did this likely occur from being in a fire or something?   |
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Pillar of the Community
United States
2403 Posts |
Hmm. I have seen some Canada Small Cents tone some strange colors before, but never this vibrant of a blue. Having said that the toning on the obverse looks even. Making the field and devices look nicely covered. However the reverse looks to be just the opposite to me. The toning looks blotchy and unnatural. I am up in the air as to whether this is NT or AT due to this.
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Moderator
 United States
56855 Posts |
Looks like environmental damage and improper cleaning to me. John1  |
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Valued Member
 United States
212 Posts |
What kind of environmental damage?
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Pillar of the Community
Canada
5239 Posts |
Heat could do it. As an experiment, I have put copper coins on a stove and you can get some amazingly vivid colours.
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Bedrock of the Community
United States
94367 Posts |
Copper can take on almost any color of the rainbow under the right circumstances.
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Pillar of the Community
Canada
514 Posts |
my guess is just the right amount of exposure some mild cleaner...
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Pillar of the Community
Canada
3733 Posts |
more than likely , it was painted at one time.
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Pillar of the Community
United States
7616 Posts |
Chemical exposure, environmental damage and/or heat does funny things to copper.
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Pillar of the Community
Canada
5324 Posts |
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Valued Member
United States
212 Posts |
Okay, so it could be toning but basically nobody knows or could know. Thanks yall!
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Pillar of the Community
United States
7008 Posts |
Reverse is super cool looking
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New Member
Canada
1 Posts |
Hello: I had a few older Canadian pennies that sat in a vinyl folder for 25+ years turn blue like this. Could be a chemical reaction between the plastic and the copper. In fact, looking through my book I have a 1946 penny that has deep blue/violet toning on the maple leafs.
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Valued Member
United States
212 Posts |
Ooo, any chance you could snap and upload a few shots of it? I would love to see one in better shape than mine.
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Pillar of the Community
United States
2403 Posts |
Quote:
I had a few older Canadian pennies that sat in a vinyl folder for 25+ years turn blue like this. Could be a chemical reaction between the plastic and the copper. In fact, looking through my book I have a 1946 penny that has deep blue/violet toning on the maple leafs. This was my first thought when I saw the obverse. I have seen some Canadian Small cents tone violets and even deep purples if you leave em in books long enough. This could be just an early stage of this. Here is one from my collection that I am pretty sure stayed in a folder for decades.  |
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Bedrock of the Community
Australia
21786 Posts |
Given the right circumstances of concentration, temperature and exposure,
detergent is capable of achieving the result seen here.
Copper sulfate is blue in color.
Edited by sel_69l
12/20/2019 03:23 am
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Replies: 23 / Views: 4,159 |
Posted 12/18/2019 04:31 am
