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Growth Technology IsoPropyl Alcohol
– You can make batches with as little as 1 ounce of raw materials, though the yield is very small. 1 lb of bud generally yields 2 ounces of oil.
99% Isopropyl alcohol. The higher the percentage, the better. Try not to use anything less than 91%. Everclear (grain ethyl alcohol works as well. These are both flammable solvents. Isopropyl alcohol vapors are highly flammable and can quickly accumulate in closed spaces.
A cheese cloth, fine strainer, or clean shirt fabric
Pyrex or glass baking dish
Grind your herbs into small and loose pieces. This increases the surface area for the solvent and maximizes the amount of compounds extracted. Freeze your solvent and your herbs in your freezer for a minimum of 2 hours. Combine your solvent and herbs in an appropriate container, such as a glass jar and let sit for a minimum of two hours (up to 24), agitating every so often. You should end up with a medium to dark green liquid.
Filter the herbs out of your mix. You may filter once again with a coffee filter and a funnel to refine it a little bit. Pour liquid into a Pyrex or glass baking dish and let your solvent evaporate completely. You do not want to ingest any isopropyl alcohol, which can cause gastric disturbances in small doses and lethal poisoning in high doses. Stir the mix occasionally. If done right, you will be left with a dark green sticky goo that contains a bit of plant fats, oils, and plant matter, and, of course, your active compounds.