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 Replies: 26 / Views: 2,652 |
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Valued Member
United States
442 Posts |
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Bedrock of the Community
United States
94367 Posts |
Looks like a developing lamination.
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Pillar of the Community
United States
549 Posts |
Lamination indeed. Sure it started from the get go as I have several. The weird stuff is lamination peel. Just my opinion so we will wait for the experts.
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Pillar of the Community
Canada
6244 Posts |
Your coin it is a cracked planchet. It seem like delamination but it is not. It is crack planchet. I can elaborate this but not necessary for this coin.
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Moderator
 United States
56855 Posts |
If it is a cracked planchet,why is the crack not on both sides? Looks like a LAM to me. John1  |
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Pillar of the Community
United States
2376 Posts |
I agree with John1 , there is no evidence of a crack in the planchet on the obverse.
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Bedrock of the Community
United States
19201 Posts |
Classic lamination matter.
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Pillar of the Community
United States
565 Posts |
Nice lamination peel. Not a crack.
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Bedrock of the Community
United States
62064 Posts |
They don't develop a lamination issue. The issue is cold rolled on to the stock material. The issue starts when the metal is cut and circulated. So the issue is the exposure of the problem when it starts peeling. If the metal were free of the cold rolled material, then the issue would not happen. It is an imperfection on the metal. Stopped when they started with the zinc cents. Now they have different issues to deal with with the zinc cents.
Edited by coop
06/10/2021 08:28 am
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Valued Member
 United States
442 Posts |
Somewhat confused by the various answers. Prob not unusual for errors. Plus I am not normally an errors guys, so not sure I'm familiar with all the terms.
I did read somewhere that there can be pre-strike laminations. Which is what I think I have here. As the letters seem to have formed over the missing metal. Am I correct?
Also, would the extra chunk by the "C" be considered "lamination with retained metal?" Because I've heard those can be worth more. Not that I'm expecting it to be worth a lot. Just curious.
Bought a full tube of 50s-60s Canadian cents for .50 cents at an online auction. Hoping to fill a few spots in my wife's Canadian book. This was in with those. So I'm basically into it for face value. Cool find!
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Bedrock of the Community
United States
10635 Posts |
Lancek, PM me a list of Canadian cents you still need, maybe I can help you out.  |
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Pillar of the Community
Canada
6244 Posts |
Ok. @John1 A cracket planchet do not mean that this crack will go on both sides. Look please at the interior of this crack and put a delamination coin side and you will be able to see the difference. With your experience I will not have problem that you will not see.
COOP brink a really point. During the rolling if the metal will not mixt well and accumulation of the zinc it is somewhere, the planchet will crack. The physical propriety of the zinc can not accept the rolling for well alloy of copper and will simply crack do to the structural molecular separation.
I say CRACK because it is characteristic to zinc separation.
I didn't want to elaborate this coin but if you guys and ladies want : This it is.
Edited by silviosi
06/11/2021 2:30 pm
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Pillar of the Community
United States
7516 Posts |
Quote:
I say CRACK because it is characteristic to zinc separation. It can't be because of Zinc content,considering the composition is: .950 coopper .050 tin and zinc. (minute amount of zinc) It is a lamination issue. |
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Pillar of the Community
Canada
6244 Posts |
Lamination by metallurgical dictionary it is synonym with rolling because the name of the rolling band or machine how you want to name it (do not matter) it is "laminor".
So yes, on rolling the "blum" (the main material after melting) we can have a few defaults: Crack, delamination etc. We can not put them on the same dish.
PS. Tin and zinc are not far one from the other on rolling proprieties.
Edited by silviosi
06/11/2021 2:46 pm
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Pillar of the Community
United States
7174 Posts |
Just a nice lam. Not a cracked planchet. Not even close to a crack.
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Pillar of the Community
Canada
6244 Posts |
Quote:
Not a cracked planchet. Not even close to a crack. @CUjohn: Can you elaborate why? I am curios to know from others theirs thinking's. |
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Replies: 26 / Views: 2,652 |
Posted 06/09/2021 11:00 pm
