I think your process is a great idea since it allows for preservation of the weed (by way of the GD). As far as the cooking time, I think your guess is as good as mine.

On another thought, one way to get an airtight environment would be to use a pressure cooker. A pressure cooker is essentially the same thing as an autoclave (which was referenced in the previous recipe). A practical problem is that I can't seen to find a pressure cooker smaller than 4 quarts. Obviously if we are only making a few ounces, there will be quite a lot of air in the pressure cooker with the glycerine/cannabis mixture.

I did find a reference to a lady in the northwest U.S. (Oregon I think) that made the Glycerine tincture using a crockpot over several days. A crockpot is obviously not airtight but she claimed that it worked. I will try and find that recipe again and repost it here.
ucesq Reviewed by ucesq on . Glycerine-based cannabis tincture? In this thread, someone posted info about using glycerine as the solvent to disolve THC from buds: http://boards.cannabis.com/recipes/133450-healthier-cannabis-food.html It sounded like the advantage was that you could put the drops under your tongue. It said that glycerine will enter your system from under your tongue, while other kinds of tinctures based on alcohol won't. It said that the high comes on faster than other methods of ingestion. Has anyone ever tried to use glycerine? How Rating: 5