A bit over the top and harsh in my opinion. Not stupid, just still being educated. @Oldhoopster nailed it already so why belabor the point?
Mountain Man, posted: "A bit over the top and harsh in my opinion. Not stupid, just still being educated." OBVIOUSLY, my comment was NOT DIRECTED AT YOU at all. Obviously, it was directed to the "Ex-Pert" (in their own mind) that you quoted who wrote that ignorant bunch of crap for you, me, and the rest of us! Oops. I sincerely apologize for my harsh words. What I should have written is that I feel there may be a tiny error in a part of the excellent information that you posted to help all of us become more knowledgeable. Now, I challenge someone to post an example of die polish on the raised devices of a coin that are incuse on the die before I find one.
Dynoking, posted: "Is the word “striations” also used to describe flow lines?" NO, NO, NO, and NEVER! In spite of what you may read. Hopefully, someone will also post images of both characteristics before I get a chance. So, we have images of die radials already. Now we need an image of die polish on the relief and striations.
Striations typically refers to LINEAR lines running across the coins which are the result of the rolling out of the strip that the blanks are punched from. Frequently they will be seen on both sides of the coin. I'm not sure if the cause is the stretching of the metal of the strip or the result of wear on the rollers. As a roller wears it too forms "flowlines" but they run around the circumference of the roller. These roller flowlines can then be impressed into the surface of the strip and run along the long axis of the strip.
Conder101, posted: "Striations typically refers to LINEAR lines running across the coins which are the result of the rolling out of the strip that the blanks are punched from. Frequently they will be seen on both sides of the coin. I'm not sure if the cause is the stretching of the metal of the strip or the result of wear on the rollers. As a roller wears it too forms "flowlines" [I learned they were called "Roller Marks"] but they run around the circumference of the roller. These roller flowlines can then be impressed into the surface of the strip and run along the long axis of the strip.
@Insider How common/rare is it for die polishing lines to show up on the raised devices of a coin? (Incuse on the die)? I'm still learning.
Very common on vintage coins. Check out Proof Franklins, and Washington quarters. BTW, I just looked at some pocket change. A 2020 cent has die polish lines all over the obverse field and NONE on the relief. That's because the field is the high part of the die and the USUAL place for die polish to appear.
This is an example of a coin with a striation. It was a scratch on the planchet that did not get struck out.
I personally call them roller marks, or planchet striations (my preferred tem). The source of the marks on the rollers is still metal on metal movement just as what causes the radial flow lines on the dies/coins, that's why I called them "flowlines" with the quotation marks in my post.
Conder101, posted: "I personally call them roller marks, or planchet striations (my preferred tem). The source of the marks on the rollers is still metal on metal movement just as what causes the radial flow lines on the dies/coins, that's why I called them "flowlines" with the quotation marks in my post. While a strip passing through rough rollers and being mostly squeezed may develop grooves, IMHO, that is not the same process that causes the erosion of the die steel associated with flow lines (radials). Therefore, I believe you should continue to use your personal terms (roller marks, striations) rather than add to possible confusion for folks like myself who may not understand quotation marks around what I consider to be a misuse of a universally used/understood term. Trust me when I say I don't pretend to be a know-it-all. I cannot "wag-the-dog" anymore either. That's because times have changed. You see, at one time in the 1970's when everything was virtually "new," we got to apply or "coin" new terms to all the characteristics we saw on coins - often with input from Mint employees. Today, there are hundreds of "expert" numismatists doing a job that was formerly done by two of us. Thus, much of the old terminology has been modified both for better and sometimes worse.
Diogenes Diaz, asked: "So if I had to give the dime a label-- a dime with flow lines would be appropriated?" While waiting for Fred... Your dime was struck with an upper and lower die. Ignoring any accidents, many dimes are struck with the same dies. Making coins changes the surface of the die so much that the first fifty coins from the same die pair don't look like the last fifty struck. Some collectors divide the thousands of dimes struck with one set of dies into loose categories. The first coins and up to coin #? are called Early Die State (EDS). Then they go from EDS, through MDS (mid) and finally to Late Die State. In the beginning, the dimes look fairly smooth with just small radial flow. As the dies erode, the grooves into the die get deeper. Planchet metal fills the grooves and causes the obvious raised radial flow lines you see on your coin. I'd call it a dime struck with worn dies.