After I finished the last post, I thought more about what I would try when I get a chance to make the glycerine tincture. It will be awhile before I can try it, but here is my idea if anyone wants to try it or if anyone else has comments. Actually, comments and other ideas would be great before anyone tries this.

  1. Place 1/8th crumbled weed into an oven-safe glass bowl or pyrex cup and decarboxylize in the oven at 200F for 20 mins. I might even go longer than 20 mins until I get a dried consisitency.
  2. After decarboxylization, pour 1 or 2 oz food-safe glycerine in the bowl or cup. Stir and mash the weed until it is fully submerged and in contact with the glycerine.
  3. Cover the bowl or cup with a small plate or aluminum foil or other oven-safe cover so that air will not circulate as much, but no pressure will build inside the vessel.
  4. Place the bowl/cup back in the oven and increase the temperature. This is where some commentary would be helpful. I'm thinking I would increase it to 250F. I've heard some cannabinoids evaporate at about 260F, so I want to keep it lower than that. Does anyone have any ideas about the highest safe temperature?
  5. Cook at the higher temperature for about 2 hours. Again this is just an idea without having tried it. I'll monitor it and try to see if anything appears to be disolving into the glycerine. I'm thinking that 2 hours should be a good amount of time for an extraction. Also, Coelho has mentioned that he heats hash oil in a water bath for about 2 hours for isomerization. He said that 2 hours gives good results, and it begins to degrade after 3 hours --- so I'm thinking 2 hours would be good for extraction and isomerization without drgrading the THC. Maybe 2 hours is too much at this higher temperature? Comments on this are welcome!
  6. Remove the bowl from the oven.
  7. Cool to a reasonable temperature for handling.
  8. Strain out the tincture into another container using a fine-mesh strainer, and pressing every bit of glycerine out.
  9. That would be the end of the glycerine tincture process, but as a fallback measure, in case the process did not do a complete extraction, I would then do the normal green dragon extraction on the remaining weed mash:

    • Add 2 to 4 oz Everclear to the bowl.
    • Place the bowl in the ususal double-boiler water-bath setup.
    • Simmer for 20 mins.
    • Strain out alcohol.
    • Repeat with fresh Everclear and combine the two alcohol extractions. (Just combine the two green dragon alcohol extractions, not the glycerine extraction!)
  10. Test the glycerine tincture to see if it worked. (Get high!)
  11. Test the green dragon tincure to see if any THC was left in the mash. (Maybe get high again!)
  12. Post results back to this thread.


What you would hope for is that the glycerine tincture would be nice and strong, and there would be nothing left for the green dragon. But since the glycerine process is kind of experimental at this point, I would do the green dragon process to make sure all the THC was captured.

Like I said, it will be awhile before I try this. If anyone has any comments beforehand, that would be great. If anyone tries any of these steps, please post the results!