Can I ask what kind of tobacco flavors and where are you getting them from ?
There are basically two kinds of tobacco flavoring ; Naturally Extracted and Synthetic.
With Extracted Tobaccos (NET) filtration is Key !
With Synthetic Tobaccos it depends on what components the manufacturer is using.
If you could post what kind of tobacco flavors and where you are getting them from, maybe we might come up with a more definitive answer.
Most of my flavors are Hangsen and Flavourart. Hangsen extracts the tobacco essence inside their operation. I don't know how Flavourart does it.
You may have already seen the Hangsen factory video, but they do highlight their direct tobacco extraction methods.