I just wanted to add, Pete:
From a 1 hr speed heating, and double filtering, my liquid is almost black as well
does it take the full time in the crock pot to get to that color for you?
I'm not sure, I didn't really check too much during the process last time. The bottles were submerged in the hot water and hard to get to without either burning my fingers or getting my oven mitt wet with the hot water. I'm sure it did in fact take a lot longer than your liquid though. The Crock Pot takes almost an hour just to get up to temp.
perhaps relevant here, is that I didn't heat indirectly. I used my turkish coffee pot, dumped the solution in and sprinkled the tobacco on, and onto the stovetop it all went. Low heat, but it started smoking after a while (I think that was when all the water had boiled off and it was just VG left over) and that's when I stopped
its a bit mild, but I can't stop vaping it. I've been adding it to everything lol
I'm pretty sure you need to use heat for the process to work with VG.
Did your extraction turn out to be smooth and sweet?
Pete