I was in Prague a while back, I had gone there to drop off samples of my Cheese#1 and some Exodus clone bud for a comparative test in a lab using gas chromatography analysis techniques and whilst out there I visited a cannabis collective that was doing loads of work with oil extractions and they pulled out these eCigs loaded with oil and I must say they didn't work too badly at all. They'd made some adjustments to them, not sure what they did but they do work quite well.
Here's a few pics of their oils and a couple of their mother and clone rooms.
@Graywolf. Good info my friend and rest assured I'll pass that on to the folk in Prague, especially with regard to cannabis acetate.
Gonna backtrack through this thread now to hopefully get some info on cannabis acetate?
My regards to your friends in Prague, a beatiful city and lovely people!
Here is the process we are currently using to make cannabis acetate, probably not refined as far as it can be yet, but works and produces reliable results.
Last run, we started by dissolving 10.4 grams of BHO into 16.5 grams of hexane, to remove it from the storage container with an unknown tare, so as to not waste any left behind in films and to get an accurate weight. We warmed the mixture in a hot water bath to increase dissolution rate.
When dissolved, we decanted into a beaker with a known tare and weighed the total amount, from which we subtracted the beaker tare and the weight of the hexane to get the BHO weight of 10.4 grams.
We then poured that into a one liter boiling flask. To that we added 25 ml of acetic anhydride and 1.25 ml of 98% sulfuric acid.
We placed the boiling flask on a combination hot plate stirrer, and added a stirring bar to the mixture.
We added an Alhin condenser to the flask, through which we pumped ice water, and reflux boiled the mixture for one hour while stirring.
After refluxing for one hour, we added 40 ml of water to react the remaining acetic anhydride, and another 40 ml of hexane. We poured that into a separatory funnel, which we finished filling with saturated salt water.
After shaking well, we allowed the layers to separate and bled off the lower water emulsion layer, only to refill with salt water again and repeat the procedure until we had run about 4 liters of salt water through the mixture.
After bleeding off the salt water one last time, we bled the hexane mixture into a beaker and after filtering through a 0.2 micron syringe filter, we boiled off the hexane using the hot plate stirrer, with the beaker sitting in a larger beaker half full of water.
Just before the hexane was gone, I refilled the beaker to the half way mark with 190 proof ethanol and boiled that off. I repeated the alcohol wash three times to insure the removal of the rest of the hexane.
The resulting acetate is of a lighter color than the original oil and of lower viscosity.