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 Replies: 16 / Views: 4,229 |
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Pillar of the Community
Canada
535 Posts |
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Pillar of the Community
United States
1609 Posts |
It's a real toughy here. I'd be inclined to say artificial, though. It's not every day you pick a purple pink blue toned nickel.
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Pillar of the Community
Australia
7096 Posts |
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Rest in Peace
United States
17900 Posts |
Natural toning progresses. AT is most commonly caused by heat, chemicals, or a combination of the two.
Blotchy uneven toning is almost exclusive to AT.
This is AT.
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Bedrock of the Community
Australia
21786 Posts |
Artificial toning.
With judicious application of heat at the right temperature and the right amount of time, this result is reproducible.
Some skill development is needed.
A kitchen electric or gas stove is all the equipment that is required.
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Pillar of the Community
 Canada
5393 Posts |
Baked potato or equivalent AT. The coin is not even NEW.
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Pillar of the Community
United States
4211 Posts |
I have seem some AT ASE's with this same look. Same coloring pattern as well. |
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Pillar of the Community
 Canada
535 Posts |
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Pillar of the Community
United States
1601 Posts |
The beaver makes it look good, though.
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Bedrock of the Community
United States
11951 Posts |
Interesting looking coin.
But I think AT
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Pillar of the Community
Canada
2781 Posts |
home workshop anodized.
youtube: nurdrage, anodizing silver
I dont condone it, but everyone should be aware just how easy it is to do and even to control the rainbow patterns.
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Pillar of the Community
Canada
3049 Posts |
Wade: true you can anodize silver using sulphur to get a toning effect but I never knew you could anodize tombac or nickel.. what's the process?
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Pillar of the Community
United States
1005 Posts |
To anodize any metal you would simply make it the anode in an electrochemical cell. Whether any surface modification occurs would depend on the electrolyte, current/voltage settings, temperature of the electrolyte, duration of treatment, and to a lesser extent the geometry of the electrochemical cell.
Many metals, not simply aluminum or silver, could be anodized to create a surface reaction/artificially colored patina but it takes extensive experimentation to dial in on a suitable combo.
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Pillar of the Community
United States
1005 Posts |
Much easier to just do it with a flame in open air
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Pillar of the Community
Canada
2495 Posts |
I believe this would be a very strong case for AT.
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Moderator
Canada
10456 Posts |
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Replies: 16 / Views: 4,229 |
Posted 11/17/2016 8:36 pm
