The key to this method is the heating phase after the initial cure. This decarboxylates the barely psychoactive THC-A into the THC we all know and love. Because it's done all in one set of steps there is none of the slow degradation to CBN and CBD that you get with slow curing. The end result is a very potent product. Those who have tried of know of 'budder' will note that for the most part this is the key to making budder; the isomerization of THC-A to THC.
First we need the usual tools for making QWISO. I use fresh, not dried, bud and bud bits that have been frozen overnight. Using undried and frozen buds is key to making high quality hash oil, as the rest of the plant matter is barely touched by the solvent; just the resinous trichomes are affected for the most part.
Putting the buds in a mason jar I think put just enough 91% Isopropanol in the jar to cover them. I then shake vigorously for thirty seconds. After that I strain the mess through a mesh strainer into a bowl. From there I pour it through a coffee filter into another container. Note how it's fairly clear; there is virtually no chlorophyll or compounds other than cannabinoids in the resulting liquid.
Now we pour the liquor into a pyrex baking dish. I set it on gentle heat and let it evaporate under my kitchen vent/hood. I have a very powerful fan in my kitchen; you might want to do this outside unless you're sure of your ventillation.
Once the QWISO has evaporated down to hash oil and it's cured overnight I put it in an oven a 220°F for 15-20 minutes. I'm still playing with different durations. This is a key step to this method. During this phase the inactive THC-A loses a carboxyl group and becomes the more strongly psychoactive THC.
Let it cool until you can handle the pyrex, then put it in as cold a freezer as you have handy for no less than 2 hours. The hash oil will freeze up and form very hard crystals.
...to be continued in the next post.
Edited by oldskoolgrower, 17 April 2009 - 02:07 AM.