Discussion in 'Coin Chat' started by Donnis E Wilder, May 7, 2021.
Log in or Sign up to hide this ad.
Ever wonder why so straight and parallel? I'd think that has something to do with how the strips are rolled out.
And I thought it was a zebra effect. Lol
I think you're correct. I've come across quite a few, primarily pennies, with such lines. I think it's got something to do with the rollers and not the actual material mixture. I've seen pix of real woodies where the lines aren't the same thickness or same distance from one another.
This isn't my picture, found it online. But you can see the big difference referencing it with the OP's example.
Here's one of mine. On the obverse you can make out the roller lines going SW-NE, basically, but the more interesting, I think, are those wavy, irregular ones, oriented top-bottom. I love these. But some of them, I have to say, are a little strange...
The weird part about my coin is that I bought it in one of those 7 coin sets and I think it was from 1982 or 1983. It is the upper left coin in this picture.
Hard to see but the toning happened in a few hours after I cut it out. It definitely got darker after it came out and was exposed to fresh atmosphere. Interesting discussion and I know @BadThad has seen mine before I am interested in his take of the roller marks versus improper alloy mix
Also @paddyman98 as an error expert what are your thoughts in the cause of the striations in color?
Improperly mixed alloys occur during ingot casting/cooling. The regions of minor alloy variations are going to vary in size and shape. As the ingot is rolled, these regions are going to stretch but they will vary in shape and width like the coin posted by @VistaCruiser69 , not the consistent stripes on the OP coin.
Think of rolling pasta. If there is something in the dough, it won't roll out in consistent parallel strips , there will be variation. If it's on the rollers, it will be constant
How did they get so straight and parallel? And not on just his, every one of them?
@Donnis E Wilder welcome to CT. really nice coin for a circulated 1982 D Lincoln. keep it for reference. good luck to ya
The lines are pretty deep into the metal. Our own forum boss Doug dipped one years ago and, as I recall, you could still see the lines.
Separate names with a comma.