A large amount of trimmings were set out to dry in a sack, and dehydrated near a heater for several days.

..meanwhile..

400ml methylene trichloride was prepared in situ, and distilled twice for purity in a hot water bath, and dried over MgSO4. An unweighed mass of very dry cannabis extract was pulverized to a powder and poured into a 1000ml round bottom flask. To the flask 400ml chloroform is added. The solvent is setup for reflux in a hot water bath for 1 hour.

The contents of the flask are poured through a funnel, and the filtrate washed once with a sodium bicarbonate solution, and twice with water. The chloroform was dried over dehydrated magnesium sulfate,filtered, and excess chloroform was distilled off.

The plant material was again added to the distilled chloroform, and the above process repeated. The chloroform remaining after distillation was evaporated and left behind relatively pure THC oil. This was kept in a clear vial wrapped in foil to protect it from UV light.

The whole process was very quick, and did not blow up my trailer with butane gas.