If you have any questions, please do drop me a line, don't wanna leave you dabbing anything with ISO in it brother!
I'll just drop by here to say with those clear pictures at the start, you definitely did not finish the purge.
Leaving a dish out in a room to let the iso evaporate only works for getting rid of most, not all of the solvent. You MUST use heat and/or vacuum to do the final purge. I have highlighted this because every single person using any solvent must know this!
This is because some solvent will remain trapped in the heavier oily solution left on your dish after most of the solvent has evaporated. It will look like there is no solvent left, but there still is going to be. If you do not use heat/vacuum in the final step of the purge, you are very unlikely to ever get enough of the iso out!
Also I have to contradict @cptchronic here and say that avb should never be soaked for half an hour with iso, as it is going to pull out lots of undesirables given the length of the wash, even when frozen first! 5 mins is too long for an iso soak.
Generally, you should soak AVB less than fresh nugs. I would not recommend doing a single wash for longer than 20 seconds for AVB, less is not unreasonable. You can give multiple washes but you'd have to have a pretty shitty/inefficient vaporizer (that leaves a hell of a lot of actives on the AVB!) for that to be justified.
Even what we consider 'lightly vaped' flower is going to have a hell of a lot less oil to extract there than anything else other than AVB we might wash. Remember that with enough time, ISO will pull most of what is in your AVB out into the oil - and most of what is in the AVB is not what we want to be dabbing! Half an hour is more than enough time. Even 5 mins is!
I suggest getting as much of that oil off the parchment as possible, putting it into a glass dish spread as a thin film and apply some heat. A double boiler will do the trick.
Good to be practicing with your AVB though as you learn to extract with solvents though
Definitely got to agree here, AVB oil IMO is a lot of work for little return and should be reserved for times when our medicine stash is not looking so good. Still in the latter case, AVB oil can be a life saver!
Kief is great to make oil
I would not mix the kief with AVB and wait til you have a lot of kief and run it separately. Especially if you freeze your material and ISO first, you will get a great extract from a 20 second wash of the kief (do second and possibly even third washes!). The how long question varies depending on how much resin and how much solvent you have in your solution to be purged. Keep a close eye on it, periodically take some material and let it cool down to room temp on parchment. See if it starts to more readily come off of the parchment (which will indicate that you do not have so much residual solvent, and may have completed your purge). There are a number of other ways to see if you have completed your purge, see Skunk Pharm etc
Most definitely, I bet you'll get the best oil you've ever made
Definitely got to agree here, AVB oil IMO is a lot of work for little return and should be reserved for times when our medicine stash is not looking so good. Still in the latter case, AVB oil can be a life saver!
Kief is great to make oil
I am suggesting lower temperatures for purging than what a stove can achieve, so I suggested a double boiler (still a bit too hot). A double boiler means you take a large vessel, fill it with water and bring it to a boil on the stove, placing another smaller pyrex vessel inside the water (before bringing to a boil) and purge your final product there. The max temp is limited by the vapor pressure of the water due to the heat, which encourages it to boil into the air. This will still be slightly too hot for the boiling point of ISO, but will avoid overdoing the purge with way too much heat.
Yes, I am suggesting always heat purge on pyrex after you evap the most fo the liquid
Of course the most accurate way to know about residuals is to get your material tested - this is obviously not cost effective with AVB oil.
That temp will do nicely my friend! Good making use of the above infoSuper interesting information. Thank you!
According to Wikipedia, ISO boils at 180.7℉. With this in mind, would you recommend purging at 180.7°? I ask because I (and really almost anyone who can afford an inexpensive home sous vide kit) can easily achieve and maintain that temperature (± 0.1°) with an immersion circulator.
BTW, that, along with a little PBW, is precisely how I cook, er, um, clean my glass.
