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 Replies: 17 / Views: 3,441 |
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Rest in Peace
10197 Posts |
Wish I could remember where I recently read that this may be caused by the transferral of copper molecules from the core through the cladding when heated or electrically agitated. Sometimes it's Little Johnnie in the High School science class with the Bunsen burner!  OH! CAN'T be that!, we don't have the arts or sciences in High School anymore! No value, artificially toned, is purdy, if you like toned coins   Edited by Crazyb0
07/21/2017 02:05 am
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Bedrock of the Community
 United States
12477 Posts |
Are these pics edited to increase color saturation and/or contrast? (I think they are)It is definitely toned but, whether it is artificial or natural is up in the air (more literally than intended). Actually, to me, there is no distinction between the two other than time.   In Memory of Crazyb0 12-26-1951 to 7-27-2020
In Memory of Tootallious 3-31-1964 to 4-15-2020
In Memory of T-BOP 10-12-1949 to 1-19-2024
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Moderator
 United States
34428 Posts |
@jimson, there are several good prior threads on CCF regarding artificial toning. This one is one of my faves: http://goccf.com/t/167272"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
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Pillar of the Community
United States
5825 Posts |
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Bedrock of the Community
Australia
21788 Posts |
It is possible to produce rainbow coins like this, with very careful application of heat treatment. Lots of experience and acquired skill is needed to control the color.
I must admit, I don't have the skill to tell the difference between an artificial rainbow toned coin and a natural toned coin.
I DO know however, that rainbow toning is a a very delicate and mostly unstable step in the transition from blast white to full dull gray patination.
Perhaps it can be stabilized with an acrylic clear coating then encapsulated. A TPGrader would easily spot the coating and refuse to grade it. Screw encapsulation is the next best alternative.
That is why, for me at least, I don't get overly excited about rainbow toned coins, despite their (sometimes) great beauty.
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Rest in Peace
United States
18456 Posts |
I don't believe clad Quarters can naturally tone this way . I say AT .  |
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Bedrock of the Community
United States
11951 Posts |
It got hot ....  |
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Pillar of the Community
United States
1609 Posts |
Someone tried to have some grilled quarter for dinner.
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Pillar of the Community
United States
1475 Posts |
Artificial toning.
Got toasted in hot pan or pot, and/or exposed to surfer.
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Moderator
United States
54283 Posts |
Quote:
exposed to surfer. you mean, like Duke Kahanamoku or Kelly Slater? |
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Rest in Peace
United States
17900 Posts |
A good example of a poorly artificial toning application.
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Pillar of the Community
United States
744 Posts |
Weber Grill? or it might of dropped into a batch of pennies someone was cleaning...
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Pillar of the Community
United States
1475 Posts |
Quote:you mean, like Duke Kahanamoku or Kelly Slater?  I meant sulfur. I grew up in Florida as a kid. All I though was surfing at the beach while in high school.  |
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Pillar of the Community
United States
1795 Posts |
I agree with Kanga AT for sure!
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Pillar of the Community
United States
4211 Posts |
Saw one like it someone baked inside a potato once just to artificially tone it.
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Replies: 17 / Views: 3,441 |
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First Page
Posted 07/21/2017 02:24 am
