So this is probably a thread worth starting. I have run wiped film and short path distillation on both ethanol and CO2 extract, I have less experience working with BHO as starting material to be honest.
While I have hit over 90% THC and over 95% total cannabinoids on wiped film fairly easily, short path distillation is obviously much less consistent. The highest SPD product I have made tested at 90% total cannabinoids and the starting material was very potent trim that made very nice crude, however, I also doubt that result as it was from a problematic test lab I no longer trust.
Using a newer testing lab, it seems that most SPD product is 75%+ THC, and 80%+ total cannabinoids. Based on public data I have seen, this probably describes about 80% of the distillate that is out there. Popular trends and Instagram have people focusing more on color than potency, so maybe most stuff isn’t that potent?
For those of you who are short path experts with lots of experience, what factors seem to matter most in producing a high quality product? Here’s what I can think of:
- Vacuum depth that allows lower distillation temps (ie., cannabinoid fractions distilled <200degC)
- Quality of crude extract: does only potency matter? Or trace “contaminants” from over-extraction that can’t be removed by winterization alone, even in high potency oil?
- CO2 super/sub, BHO, EHO: any easier to work with than others on SPD?
- Going “low and slow” to get more pure fractions? Or does long heat exposure isomerize cannabinoids and lead to lower results?
- Distillation heads: the right tool for the job, and different heads or diff packing depending on first/second pass or volatile/cannabinoid fractions.
- Winterization (obviously) [Although I have found that wiped film can sometimes produce good product from poorly winterized material]