Green oxidization on cartos like found on old pennies?

[Adrenalynn]

Part of the point (no small part) to Nichrome is its resistance to oxidation at high temperatures.

The aluminum and silver are both right out.

The PG will attract water vapor from the air and trap it - it's used as a humidifier in cigars and pipe tobacco.

The coil can discolor - it's more brown to brown-black though. That's probably from electrical corrosion and probably accounts for a lot of what people think is "burnt batting". But you'll find that in far higher density in toasters (which work on the same principle with the same materials).

I strongly suspect, barring eliminating variables and better documentation or steps to reproduce, that we're seeing unvaporized deposits from the flavoring components. But that's just a guess until it can be tested - my mind stays open to any physical possibility...

 

[jdvorr]

Arthur Conan Doyle - "Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth."

I love to see the scientific method at work.

 

[Joe Camel]

I believe only copper turns green and it is green when found in nature. It's also a lengthy process for it to do so.

 

[CES]

all this sort of brings us back around to the question in the OP....

At the risk of being absolutely wrong, it sounds like the consensus is that the deposits are more likely to do with the juice rather than the cartos, and are not likely to be corrosion. It may be that they're an effect of the juice color or flavoring components. The undertone seems to be that it's probably minor, but that without additional testing no one really knows exactly what it is, or whether it's something that we should be concerned about.

Please correct me if i mischaracterized