2022 S Wilma Mankiller Quarter Partially Sintered Planchet?

[GraCJoy]

This came from a roll of uncirculated S mint Wilma Mankiller quarters. Is it a partially sintered planchet? Another quarter can fit quite nicely into the curve of the blackened area.

[Paul]

It may be to your advantage to look up the term "Sintered"…...............

[GraCJoy]

I don't know what else to call it. Sorry for using the wrong word.

[Paul]

Surface discoloration or staining…

[GraCJoy]

I'm sorry to bug you, but after looking up what sintered means, I still think it applies to this coin. I don't know what else would cause it to look like that. The inside edge of the curved part fit perfectly around the outside edge of another quarter, which is why I thought partially sintered. This is a brand new coin, so I can't think of any other way for it to look like this.

I'm not trying to argue, just trying to learn as much as I can. I did do some research before posting.

[Daniel]

Sintered planchet has nothing to do with another coin, the shape and it can't be partially, sintered planchet is the entire planchet and doesn't look like this. It's the reason Paul ask you to look it up, that is the best way to learn this. error-ref.com is a good place to look this up.

Also, new coins are be stained and toned and that is what this looks like.

[GraCJoy]

Okay. Thanks for your help.

[DSCoins]

Keep in mind that all the American Woman coins are struck with a normal business finish IE. Circulation. None of them use any special dies, even the rolls of the S mint marked coins. There is no special handling at all. All of them are handled just like every other coin made for circulation. If you open a roll of any one of them, you will have minor scratches, nicks, watermarks, and some discoloration. I can guarantee you will find this in every roll/bag that you search in this series.

[Earle42]

"I'm sorry to bug you, but after looking up what sintered means, I still think it applies to this coin."

I'm not trying to argue, just trying to learn as much as I can. I did do some research before posting.

OK...in the spirit of learning, now look up how coins are annealed and why. Then ask yourself if a coin could be partially sintered.
Here is a good place to read about annealing:
https://www.fleur-de-coin.com/articles/blanks-planchets


Coins in bank rolls have been through a lot. The mint does not roll coins. Coins are ejected from the press (very quickly) into very large bins, allowing them to fall on each other and mar each other in doing so. The bins are sealed and sent to a facility the mint uses for rolling the coins. What machines they go through to be rolled, I have no idea, but there are chances for all sorts of things to happen to the coins. A lot of people just assume a bank roll of new coins is going to always have pristine coins in them. This is not the case.

[DSCoins]

@Earle42
Do you still have the link for the way the mint produces coins?

[Paul]

SEE

[Earle42]

@DS
Your video link is the one I use:
How Coins & Errors are made:
How Coins (and errors) Are Made

[Daniel]