Here's a link to the old thread I wrote. This new way is much better.
I love oil. It is by far my favorite way to consume THC. So I figured out how to make it, because fuck paying what people charge for what basically amounts to a little bit of trim, a little bit of solvent and a little bit of time. I can do it myself for cheap, and so can you!
This is something that I've adapted and modified and brainstormed and (especially) experimented on for a long time now, and I think I've finally got it down.
For the materials, I'm going to list what I use. I happen to have lab glass, but you can make substitutions where you need to. Just make sure to test any plastics with a bit of your solvent to make sure that they won't dissolve.
SAFETY PRECAUTIONS! DO NOT SKIP THIS PART!
Risk of fire. Do not perform this extraction near open flames or sparks. Do not smoke in the vicinity of this extraction. If a fire starts, cover it with baking soda and cut all heat sources. Use adequate ventilation. If at any time you feel lightheaded or dizzy, seek fresh air immediately. Damaged glass may explode when heated or rapidly cooled. Always wear oven mitts when handling hot glass. Always make sure to use clean solvents. Do not perform this extraction in any place where it may be illegal.
Plant material (you get out what you put in, so use high quality pot)
70mm Buchner funnel
Filter paper (fast-draining type)
500 ml vacuum flask
Vacuum hand pump
3 x 125 ml Erlenmeyer flasks
Acetone (anhydrous preferred but not necessary)
Measure out your solvent first. For the first pull, measure out 14 ml of solvent per gram of plant material. For the second and third pulls, measure out 12 ml of solvent per gram, per pull (IE: if you were running 10 grams, you'd have 3 flasks - one with 140 ml, one with 120 ml and another with 120 ml.) The reason you use extra solvent on the first pull is because the plant material will soak up some of the solvent. Put all 3 flasks of clean solvent in the freezer for at least 4 hours. The colder, the better.
You can also freeze your filter flask and Buchner funnel if you like, although I find it to not make any difference whatsoever in the final product. It's no real extra work, however, so do it if you like. Don't freeze the rubber vacuum adapter.
Break up your pot very finely, removing all seeds and stems as they will impart a bad taste in your final product. I like to use a coffee grinder. It doesn't have to be powdered, but it should be a good bit finer than what's required to roll a joint.
Set up your Buchner funnel on top of your flask. Place the filter paper in it and put your plant material on top of the filter.
Slowly pour your solvent over the plant material. Remember to use the flask with the most solvent for the first pull. Do not overfill the funnel. Make sure to cover all your plant material, but don't fill to more than 3/4 full. Do multiple runs or buy bigger equipment if necessary.
Wait for your solvent to drain using only gravity until the drip becomes very slow. At this point, apply your vacuum. 50mm/Hg or less is ideal. Anything over this will pull chlorophyll and other unwanted contaminants with your cannabanoids. Do not
press the plant material at any point to remove solvent.
Pour each pull into its' own separate evaporation dish or combine them all. Each pull will vary in potency, taste and yield.
Evaporate using a fan. Once your oil no longer smells of acetone and isn't too runny, place in a pre-heated oven at 200F for 30 minutes to remove any residual solvent. Let cool slightly before collection. Collect your oil with a razor while warm but not hot. You should be able to pick the evaporation dish up without any protection, but it should still feel very warm.
Dry the oil, then leave it in the pan - do not scrape it with a razor as in the last step. Fill your evaporation dish 3/4 of the way with distilled water. Heat this in your oven at 250 F for 30-60 minutes. Allow the dish to cool to room temperature, then place it in the fridge for two hours, or until all oil has precipitated. Do not freeze. Discard the water and repeat a total of 3-5 times.
Add a minimal amount of warm solvent (anyhdrous preferred) to the pan and re-dissolve all your oil. Filter if necessary, making sure to wash your filter paper with more warm solvent so as to not lose product.
Step 8: Evaporate with a fan again in the same pan. Scrape up with a razor when completely dry and still warm but not hot.
Sour Bubble, organically grown in coco coir using compost teas
Sour Bubble oil
That's pretty much it. It's extremely simple and extremely effective. Yield ranges from about 15-25% depending on the pot used. This was designed for concentrating good, organic pot. I do not suggest using any plant material that hasn't been properly flushed, as this will concentrate the bad along with the good, creating bad flavors, reduced potency and potential future health problems. So no brick weed. It'll work just fine, but you have been warned. I reccomend that you smoke this from a proper concentrate pipe. My favorite is the nail/dome setup, but there are others out there. Failing that, hot knives have never failed any hash enthusiast.
Note: I do not feel that vacuum purging is necessary with this method, as long as proper water washes/drying methods are used. Acetone is miscible with water (unlike butane) and therefore should theoretically be effectively removed with water washes and sufficient drying.
----This is, like everything I may write, a work in progress. It will change slightly as I get more experience and learn more.----------