E-cigarettes: research - experiments - ideas

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What’s left is a dark-brown juice that I mix in with the vp/pg and nicotine juice - just for flavour, but it seems to work well.

So you are vaping tobacco mud. Very creative!!
How are your coils doing?

Not sure if there is a lot of nicotine left in that leaf juice, but at least it tastes good, so I’m not overly fussed about that.

When stored dark the nicotine remains. It will degrade some when exposed to light.

I have been putting tobacco residues in whiskey for months and ended up with a brownish sauce that I then slowly let evaporate on a warm stove

The classic method of flavour extraction would be to use the whiskey and filtrate it. I use gravity filtration by storing the alcohol in the fridge and wait until the dust settles.