That's nice, but don't you get the carcinogenic compounds into the juice this way? The tobacco specific nitrosamines are soluble, if I remember right, so they get into this extract and then into the juice.
I'm really into the idea of NET, but there really are three major questions:
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Tar levels contained in the final product (I would get tar buildup ony teeth from smoking rollups)
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Nicotine strength of final product
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Carcinogens amd their behaviour in different resistance coil's temperature settings
And of course, which filtering method would help you achieve optimal results.
And, practically speaking, every time I have done this I ended up with a juice that would gum up a coil in under an hour. The flavored pipe tobacco was the worst offender, but even the most natural, unflavored tobacco I tried was a coil destroyer.
Does it extract the flavor and nicotine or just the flavor ? If both then how can you tell your nicotine strength other than guessing?
Would the flavor consentrate have an unknown nicotine concentration?
I've never done DIY before but now I'm considering putting a couple Liga Privada Undercrowns into the food processor and picking up some VG and PG. What do you recommend if I want to add a sweetener?
As others have said, don't forget this will extract a lot of assorted chemicals from the plant matter, including (possibly) Diacetyls, nitrosamines, and other 'nasties'. I love the idea of running proper extraction setups, but I'd only be comfortable if I had a GC/MS set up to test what I was making.... Possibly you may be safer if you are extracting alkaloids via an acid/base extraction, then using careful old fashioned recrystallisation and MP tests to ensure you have your target.... but still.