1982 D Large Date

What caused these stripes? It is copper.

 

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It’s called a woody. The stripes are caused by a poor mixture of the metals and yes, that would be a copper cent. A definite keeper but not worth a lot.

 

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.

 

Woodie and some collect them. I enjoy the look and have some cents and nickels that are woodies. They are an improperly mixed alloy and not worth much over face value, but cool to look at. I'd keep that one.

 

Roller marks very common and in that condition NAV but keep it if you like anyway a cent won't hurt.

 

Thanks to all.

 

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...

 

I have one of these and have heard people call them roller marks. I think the op's coin is not caused by rollers but is an improperly mixed alloy that is toning based on the variation in alloy content and not because of rollers. Here is mine, has various thicknesses of lines that are toned differently.

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?

 

They're Roller marks. The parallel lines that keep a consistent thickness seem to occur on late 70s- 1982 cents.

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

My opinion

 

I have a few very nice looking woodies. I put them in self stick 2x2's and use them for show-n-tell at our local schools. Thanks for sharing yours.

 

I have had many woodies over the years. Oh, you mean coins? I have a 1964D MS 65 Kennedy half that is woody toned. It has been posted on here a few times.

 

How did they get so straight and parallel? And not on just his, every one of them?

 

The giant machines that roll out the metal into a sheet get dirty over time and impregnate impurities into the metal. This cannot be seen when the planchets are cleaned and processed. It only manifests as the coin ages and tones creating "roller lines". It is mostly seen on the 1981 and 1982 copper cents.

 

I vote for roller lines.

 

hey @Donnis E Wilder welcome to CT. really nice coin for a circulated 1982 D Lincoln. keep it for reference. good luck to ya

 

Thank you

 

About a year ago I came across a penny with the same type of lines that the OP posted pix of. After doing some research and reading some posts on this forum in regards to woodies, I figured it was just roller marks. So I took a cotton swab, dabbed it in rubbing alcohol and then on one part of the coin I rubbed the surface with the alcohol swab. The lines started coming off. So I knew for sure at that point, they were just lines on the surface of the coin, and not in the mixture of the material.

 

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.