Step 1 (Preparation): Before starting this sequence, it is very important that you take proper precautions, have the proper supplies and the a decent preparation area.
You will need the following supplies: 1 ounce of super dry marijuana, 1 gallon of high proof alcohol solvent (Everclear works best), medium sized Pyrex mixing bowl, large wooden spoon, straining device (Muslin Bag works best), a separate container to catch strained liquid, double boiler setup, silicon spatula, plastic syringes.
Preparation Area: You must also be sure to have the proper ventilation(open windows/fan), as well as an electric stove (gas stoves are more dangerous with solvent), and a fire extinguisher.
Step 2 (Grind): Place 1 ounce of extremely dry and ground up marijuana (sativa or indica) into a medium sized, Pyrex glass mixing bowl. Make sure you can spare a few inches above the marijuana grind, as liquid will be added soon.
Step 3 (Dissolve): Add Everclear or another high proof alcohol solvent which will cover the marijuana in it’s entirety, with about an inch of additional solvent on top.
(Caution: never use rubbing alcohol as a solvent)
Step 4 (Mix): Slowly mix the Everclear and marijuana together in the bowl for just about 3 minutes. Use a large wooden spoon/large fork to mix the marijuana with the solvent, allowing for the solvent to dissolve resin and oils from the herb.
Step 5 (Strain): Delicately pour the marijuana solvent mix through a straining device e.g(muslin bag, grain, cheesecloth, Thai filter, steeping bag, etc) into a separate 2 quart mixing bowl or large bowl.The strained concoction should be dark with greenish undertones.
Step 6 (Repeat): Place marijuana material back into original mixing bowl and repeat steps 2, 3, and 4 in order to remove all oil and resin from the marijuana a second time.
(Caution: repeating the straining process a third time will ruin your batch as the remaining marijuana resin will have little to no benefit.)
Step 7 (Boil): Pour dark green mixture from both washes into the top of a double- boiler. Make sure that the bottom pot of the double-boiler is filled with water before turning on the heat.
(Caution: if you don’t have enough space for all of the mix in the double-boiler you can continue to add the remaining marijuana mix as the level in the double-boiler begins to drop during the evaporation process. )
Step 8 (Evaporate): Begin heating the liquid on high setting until the top pot of the double boiler starts bubbling, then turn the heat off promptly.Allow the heat from the bath of water to heat the top pan until the Everclear or high proof alcohol solvent has evaporated. Once you see that the dark green mixture is bubbling, immediately turn off the heat. This process can take anywhere from 15-25 minutes.
Step 9 (Almost Done): You are done when the liquid has become a thick green substance and no longer bubbles. If the liquid has ceased to bubble but is somewhat runny, you can turn the heat back on low until it starts bubbling again and you are satisfied with consistency.
Step 10 (Cool Down): Use plastic syringes to draw up the remaining which will allow you to create individual portions for future medical use. The semi thick liquid will become thicker once it cools. Be sure to dry the left over oil in a cool, dry place.