THC will separate from the plant at 149 C, Alcohol boils at 78 C. That is not to mention i want all the cannabinoid is the tincture other than thc. CBD vaporizes at 206 and CBN at 212. Its not easy to reach those temps in a water bath so you must heat it prior to putting it in the alcohol. If this is incorrect please let me know as it is the best way i can learn more.