I am new on here and new to vaping and am very interested in DIY liquid, so please excuse me if this has been discussed before, BUT .........
Stupid question # 1
If you use any infusion system to extract tobacco flavour from cigs, pipe tobacco or cigars aren't you extracting all those 1,000's of chemicals in tobacco that we try to avoid by vaping ?
Welcome to the extraction forum. Your question has been asked a few times but isn't a "stupid" one to ask. First, there aren't 1000's of chemicals added to any tobacco. We've all heard that ANTZ propaganda so often we took it to be fact but in truth there are 600 chemicals known to be used in tobacco products with many being the same "flavorings" (Blueberry, Peach, Cherry, Vanilla....etc), we use for vaping. Also included in the list of chemicals is PG, VG, Liquid nic, Sucrose (sugar), Sucralose (sweetener). No single tobacco contains all 600 chemical additives but as with DIY juice each blend contains a few of them, some tobaccos contain more than others. Cigarette tobacco is a prime example, from what I've read tobacco companies use toxic chemicals like Ammonia (makes the nicotine more effective), Benzene, Acetone and many other "questionable" chemicals which is why I don't extract flavor from cigarette tobacco. Pipe tobaccos and Cigars can have Sucrose, Sucralose, PG and various flavorings added to them. I'm not certain but suspect pesticides could also be present on some tobaccos, I'm especially cautious of those that are foreign grown in nations with little regulatory oversight. I think it safe to assume that any chemical added to the tobacco could find its way into our flavor extracts.
The main health hazard associated with smoking tobacco (carcinogens), only occur when the tobacco is burnt (a process called pyrolysis), and inhaled. Polycyclic Aromatic Hydrocarbons (PAH), Acrolein and Nitrosamines are potent carcinogens and are all created by pyrolysis (when the tobacco is burnt). These same carcinogens are produced when burning ANY organic matter, not just tobacco. When you "flame kiss" that steak on the grill guess what you just introduced.... The big difference is dosage/frequency, smokers create and intentionally inhale these carcinogenic pyrolytic products repeatedly throughout each and every day whereas the steak is consumed only occasionally. Carbon Monoxide (a poison), is also a product of the combustion process, it isn't in the tobacco but is produced when you burn it. So is NET safe to vape since we aren't burning anything? Probably not, vaping anything, even unflavored, is likely not 100% safe. Carcinogenic pyrolytic products can be produced/formed at temperatures as low as 400F. What is the crud that builds up on our coils? What happens when we get a "dry hit" when using cotton wick? No doubt in my mind vaping NET is FAR safer than burning/smoking tobacco, but I personally doubt it is without some measure of risk.
Hot or cold macerations, Supercritical CO2 and steam distillation are the same in that using PG, VG, PGA, CO2 and or water as the solvent to extract flavor from tobacco does not extract any but trace amounts of nicotine or WTA's.... period. I wish it did, but it doesn't. If you want any measurable amount of nic or WTA in your NET you will have to add it. The process required for extracting nicotine and WTA's is complex, involves highly toxic chemicals and is best left to certified labs/chemists.
Personally, I didn't start vaping to stop smoking. I love tobacco and smoked it for 40 years, the last 15 of which was spent as a pipe enthusiast. I didn't quit using tobacco, I just stopped burning it. I love the flavor of NET and after two years of vaping it (and not smoking), I feel much better physically. I've been extracting flavor from tobacco for quite some time. The past year has been the most informative/productive and conducive to my extraction efforts especially after finding ECF and the extraction sub forum. There is a wealth of information/data available on-line some of it is hard to find but well worth the time and trouble.