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 Replies: 18 / Views: 2,207 |
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Moderator
 United States
98289 Posts |
I'm with john1, zincs don't have laminations issues. maybe an electroplating issue.
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Bedrock of the Community
Canada
21654 Posts |
Quote:
Zincolns do have a lamination issue John1, Do you mean zinc coins do NOT have a plating issue This is a quote from Conder101. I know that this has been debated before here and on other forums. Quote:
While laminations are seldom seen in modern coins they CAN occur in clad, solid alloy AND plated zinc cents. Correct typo Edited by JimmyD
01/03/2022 4:47 pm
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Pillar of the Community
 United States
3281 Posts |
Ah, so it seems I've found a coin that brings debate. Here's a similar topic I looked at: http://goccf.com/t/374860The Edit that I made to my post responding to Jimmy was questioning the idea that Zincoln's don't have laminations, but I realized that he said "planchet," which made me disregard what I said. (Something that was mentioned in the topic I linked). I'm looking forward on seeing what this discussion brings. |
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Valued Member
United States
426 Posts |
Very cool defective planchet I'd say. Yea copper plated zinc cents can not have lamination issues. Here's a great pages in error scope written by the one and only Pete apple. Your coin does seem to be defective copper plating possible I had one on a 2020 before.    |
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Bedrock of the Community
Canada
21654 Posts |
Maybe we can add this to the debate.  |
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Bedrock of the Community
United States
19247 Posts |
This is fun!
At first glance, JimmyD's NGC coin would be written off by many here as having a linear plating bubble issue--if all we had to go on was the single photo above. Fascinating.
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Valued Member
United States
426 Posts |
Def something is going on with the Planchet or copper plating.
Ofc third party graders are not the best for attributing errors honestly they mess up a lot are not as familiar with the minting process as they need to be.
I don't what could be going on or what it would be called but def some type of defective copper plating
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Bedrock of the Community
Canada
21654 Posts |
On the NGC slab, that is a linear plating bubble running through Abe, I think what they
are referring to as a Lamination is at the top running through the S in TRUST.
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Moderator
United States
98289 Posts |
Here is a good read of lamination and inclusion errors in steel, AND other alloys. https://www.rolledalloys.com/techni...-laminationsQuote:
What are laminations?
Laminations are an imperfection in a steel or alloy, resulting from blisters, seams, foreign material, and/or scratches on an ingot or billet that are not repaired during the rolling process. I think this is why post 1982 cents cannot have a 'lamination' issue, it's because the copper is electroplated to the zinc AFTER the zinc is rolled out. Now onto electroplating of a zinc base with a copper overcoating. https://www.freepatentsonline.com/3716462.htmlQuote:
COPPER PLATING ON ZINC AND ITS ALLOYS
United States Patent 3716462
Abstract:
Production of a uniform, continuous corrosion resistant bonded copper coating on a zinc or zinc alloy body, by a process which comprises contacting the zinc or zinc alloy body with an electroless copper plating composition or solution consisting essentially of a soluble copper salt, e.g., copper sulfate, a complexing agent, e.g., citric acid, and a reducing agent, e.g., sodium hypophosphite. The resulting zinc or zinc alloy body can then be contacted with a copper electroplating bath, and according to one embodiment the resulting copper plated zinc or zinc alloy body is then treated in a nickel electroplating solution, followed by treatment in a chromic acid electroplating solution, to provide a corrosion resistant bright attractive metal coating on the zinc or zinc alloy body. The above noted novel electroless copper plating composition, and the zinc or zinc alloy article coated with an electroless copper plating. |
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Moderator
United States
56855 Posts |
I meant to say they do not have lamainations. I hope Mike chimes in. John1  |
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Pillar of the Community
 United States
8815 Posts |
I'm thinking a die crack in the zinc in the field and then it follows the striation from there on through the bust, path of least resistance. Someone much better than me, did a study on these striations in the zincols but don't remember the outcome, maybe just a lighter version of a plating bubble, a disturbance on the planchet before being plated.
-makecents-
Edited by -makecents-
01/03/2022 10:08 pm
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Bedrock of the Community
United States
62064 Posts |
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Pillar of the Community
United States
3281 Posts |
A variety of different conclusions I see. Only makes this coin even more interesting!
Thank you for everyone's help and discussions. This has been very informative.
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Pillar of the Community
United States
7090 Posts |
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Pillar of the Community
United States
5797 Posts |
Thanks Gorham collector for that article by Pete Apple. Very interesting but it does say zinc cents (CPV cents) are resistant to laminations, not free of them.
(Underlining is by me.) Maybe I'm interpreting it incorrectly.
".... This is believed to be a reason for the resistance of CPV cents to lamination. ...
There are other more minor differences between copper alloy and CPV cents which undoubtedly contribute to the CPV cent's resistance to lamination: .... "
The only thing that surprises me about zinc cents after 40 years and hundreds of billions of zinc cents produced is that aren't more planchet defects (before the plating) that show up.
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: 18 / Views: 2,207 |
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First Page
Posted 01/03/2022 4:36 pm
