Post your coins with striations.

I like your explanation of this concept.
There are some points/areas on the surface of a coin that can receive a lesser amount of PSI pressure from the striking action. They are usually where design areas (voids) are the largest as these areas are a receiver for metal that is being displaced by the (flat blank Face area of the) dies as they squeeze closer together.
When a coins press is run at a high production rate the coin metal literally does not have time to completely flow into those voids and obtain the full striking pressure. This is why FS nickel are HTF.

 

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These Stria were on the planchet before strike.

 

@Insider

Did I win?

 

You receive a hearty hand clasp on your next Florida visit

 

Presumably this also explains why the 1921 high-relief Peace Dollar often appears "flattened" at its highest point even in the absence of wear.

 

Why is Maya Angelou on the back of the quarter? I didn't even know about this. Is the mint doing a series on modern writers?

Of course I also didn't know they'd redesigned the obverse as well. I don't follow quarters.
Heck, I no longer follow much of what the US mint does.

Oh snap I just went OT in a certain person's thread. Oh well on the ignore list I go

 

Not to beat a striated horse to death, (No offence to the Majestic Zebra) but the Maya Angelou quarter is confusing. On all of the others I have, the striations are across the entire coin and on both sides. I always thought it was caused by dirty or seized pinch rollers during the lamination or punch process. This explains the discoloration due to friction as well... However, the MA quarter has a well-defined crescent shape on the obverse, and not so much on the reverse. I could imagine it being due to inconsistencies in the planchette thickness, but I would think that upon being struck this would move the metals towards the thinnest section and at least somewhat distort the parallel lines. None of these seem to be affected when the coin is struck... Another clue lies in the edge. Every coin I have with this type of striations has a jagged edge on one side and rolled smooth on the other.






So, what am I missing?

 

From 1989P Mint set

 

Does this coin have "striations?"

 

Pulled some striations from a roll a few days ago

 

Popcorn in hand.

 

What have we learned so far boys and girls?

 

That not everyone knows what "striations" are?

 

lol

 

I'll guess we are all on ignore or the OP got tired of the smart ass remarks.
The truth is, I really wanted to hear what he had to say on the topic.