Coin Rust Throughout Un-Opened Rolls

To be honest ,I have never seen anything like that on an uncirculated roll of 90% copper Cents . How was it wrapped ,paper or just placed in plastic tube ? Where was it stored and for how long ? If it is mold then I think your goose is cooked . Take the nastiest coin and soak it in acetone for awhile and see what happens .

Thanks these were unopened bank rolls stored for 50 years not exposed to any moister , stored in the previous owners home in his coin room
I put a bunch in a sealed plastic container with about 56 other unopened rolls and they have been stored in home closet.
I am almost afraid to crack open other rolls much older....
Thanks for input and help

Not mold,carbon spotting.
John1

that carbon spots are black . I'm still up in the air with those Blue spots . Like I said never seen anything like it; and I've been a BU/OBW Lincoln roll collector since the early 60's .

Spotting in this color spectrum can come from a combination of insecticide and common household cleaners in the ambient environment.

Cupric Acetate is in many insecticides. Ammonium Chloride can be a by-product of using Ammonia-based cleaners on surfaces that also have been cleaned by Chlorine-based cleaners, such as bleach, or of bleach-washing dirty diapers. Tiny amounts in the ambient environment could be sufficient to make these spots over time.

Even if the coins were stored in a proper environment by the collector, where were they stored before the collector acquired them? My bet: in a basement, near the washing machine, where a pest control company regularly sprayed for bugs.

The damage is permanent.

This is verdigris from improper storage, not carbon spots. The black is cupric oxide - the terminal state of copper corrosion. You can see the green center spot (verdigris) in most of them. This corrosion is very advanced and has ruined any coins you see it on.

Since verdigris can spread across coins and completely ruin obw rolls, the rolls MUST be cracked, the corroded coins removed and quarantined and the good coins put into tubes.

I've opened hundreds of OBW rolls and found many with coins like this inside. It's major problem and the dice you roll buying OBW rolls as you never know how well they've been stored. There are a lot of thread on CC discussing the issue.

GOOD LUCK!

Great job!

Here's a clear example of what I call "contact corrosion", e.g. corrosion that is introduced from coin to coin via contact.

I found this in a tight, OBW roll. You can see where the corroded, brown coin caused the AU red coin to corrode inside the roll. I had to pry these apart with a surprising amount of force.