Essential oils as in resin right?First off, I'm personally not a fan of iso extractions, as with this method it straight rapes the terps to near null in the final product. Every iso extract I've made myself ends up an oily brown-black and smells like graphite (like pencil lead), its not dabbable - and to be honest even with a long cure it has always been a little burny on the throat when smoked. It also kinda takes a while for me to purge it to the point that im satisfied most of the alcohol has evaporated, ya definitely don't want to smoke any non evaporated iso residual. As long as the ingredients are 99% alcohol and 1% you should be fine with any brand though- the 1% water will also evap off with heat. Wish I had pictures to show ya on the process but back then I didn't really take many pics.
I know it sounds stupid, but if you or your lady have a hair straightener and some spare parchment, and maybe a spare clean teabag (for filtering plant material) laying around, you can make rosin. Super simple method, no solvents- just heat and pressure. It produces a very nice (dabbable) oil or shatter dependent on strain it preserves
terpenes very nicely, usually actually stronger potency than most bubble hash and all iso out there as well. All you do to try it out is grab a little tester bud a little bigger than a large bowl and stick it in a piece of parchment folded in half once and give the bud a press with the heated hair straightener for about 6-7seconds. You'll hear a sizzle as the oils are extracted onto the folded parchment around the material, then scrape up the oil that distilled onto the parchment. Its definitely worth a try man. You don't have to dab it either if thats not your style. You can put it on a bowl or even eat a little bit of it because it's decarbed from the heat extraction process.
Here's what I got from testing it out on less than amazing starting material. I used hash instead of flowers.
From a little junk to a little funk.
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The spot in the middle with no oil is where the hash ball layed when it was folded in the once folded parchment. I used a 25 micron hash pressing screen to filter out the plant material.
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here's some rosin made from keif
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