Theories And Questions On Woodie Cents.

I'm completely wrong.

That's crazy. I learned about how the trails are made too. Awesome find.

We know improper annealing often causes color change. With the Stripies, the color change is more frequent. Why?

Cool, that will work. It might take a little while though. A few posts back you said you'd have it in a minute. lol. I gotta go now Kid. As always, good talking to you.

The gray and brown color of the aberrantly-colored stripies is superficial, even in clad coins. I did scrape the rim of the brown stripie dime whose image I posted earlier. It's the normal color of copper-nickel.

Mike, in an attempt to be constructive, my opinion has evolved as follows: I think both the narrow and wide stripes are caused by insufficiently and/or improportionately mixed alloys. I believe the wider stripes are more insufficiently mixed than the narrow ones, and are thicker in volume as well. I believe this for a couple of reasons.
First, I believe one sees the narrow stripes in clad coins because the clad layers are less prone to this error (enough that the stripes are not wide). Second, I believe the narrow stripes appear as "superficial" when the coin is worn, because they are thinner by volume than the more poorly mixed wide stripes.
When it comes to nickels and clad coins with stripes, I think their frequent association with a gray or brown color is a direct result of an improperly mixed alloy of a different combination of metals than that of cents.
Mike, you are certainly at the top of your profession, so I just thought I'd offer an "other side of the coin" from a relative layman's perspective. JMO

As for clad coins, the stripes may come from the rolling process wherein the 3 layers are pressure joined. They are literally fused. The Cu layer is in the center with the two outer layers being the CuNi. I agree that the lines probably come from this rolling, process, in which great pressure is exerted. The direction of the lines may follow the direction of the sheets (film) as they move along the pressure rollers. Are they then annealed before striking? I know that the pressure bonds are enhanced by first roughing the surfaces of each metal coil/roll. Anyways, if they are annealed after the cladding step, then this may help explain. Too, it is possible that when rolled, the copper cores (coil) may "swell" up into the outer layers, enough to color it, especially if the roller is not 1000% smooth?

I now suspect that brown and gray-colored stripies found in nickels and clad coins are the result of both rolling and improper annealing. I suspect that the elevated temperatures of the annealing oven somehow bring out the striped pattern that is already latent in the surface metal. This conjecture would explain the greater-than-random association of stripes with discoloration and the uniform discoloration of the coins' edges.