PREPARATION OF CANNABIS TAR

Place ½ pound of marijuana (seeds and stems may be included) in a large double boiler or heat bath, cover with alcohol (about two quarts), and boil for 45 minutes. If available, pure grain ethyl alcohol may be used. If not, vodka is a fair substitute since it contains about 50% ethyl alcohol in water. These are expensive solvents in countries where liquor taxes are high. Because all of the alcohol will be removed by evaporation before the tar is used, one may use isopropyl rubbing alcohol instead. It contains 70% isopropyl alcohol and 30% water. In the USA, it is much cheaper than vodka or pure grain spirits. Be sure to use no kind of rubbing alcohol other than isopropyl compound. This is the kind that is usually sold. Some rubbing alcohols are ethyl alcohol with a bitter nauseant added to discourage drinking. Do not use this latter type, as it will leave a horrid-tasting residue.
Keep a constant watch on the boiling pot. Be cautious not to let the alcohol boil over. Remember that alcohol boils at a lower temperature than water. Also remember that alcohol is combustible. It is safer to use a hot plate or electric range than a gas burner for this process.
After 45 minutes, strain the boiled materials and save the green solution (the extractions). Add more alcohol to the mash while it is still damp and repeat boiling for another 45 minutes. After straining the second extractions, combine them with the first ones. A third extraction may be carried out. But since its active content will be rather low, it is best to save this extraction to be used as the first extraction solvent the next time you make tar.
Fill a clean double boiler halfway with the strained extractions. Heat these without a lid and under well-ventilated conditions until the liquids have boiled down to about one-quarter way. Add more extractions to bring liquids back to the halfway mark. When the last of the extractions are in the pot, continue boiling until the scent of alcohol is no longer detectable. The problem at this point is to evaporate off any remaining moisture without scorching the tar. If 100% pure alcohol is used, this problem does not exist, since double boiling may be continued until only the tar remains. If vodka or rubbing alcohol is used, there will be a considerable water content which must be removed. There are two practical methods of achieving this.
The boiled-down extracts can be poured into a pyrex baking dish and left in an oven overnight with the heat at the lowest possible setting. In the morning, if all moisture is gone, the tar can be scraped up while still warm and put up in a jar. The alternate method requires more effort but less time, if you are in a hurry. Fill the lower compartment of the double boiler with salad oil rather than water. Be sure that the pot is completely dry. Otherwise the oil may spatter when heated. Heat the double boiler as before, but at a slightly higher temperature. Oil boils at a higher temperature than water. You may continue boiling off the water until it is gone, without scorching the tar. When evaporation is completed, pour the
molten tar into a jar. Any which clings to the pot can be loosened by adding some hot vodka. This vodka solution can be sweetened with honey and served as a cordial or used as a stoning cooking brandy.

Isn't this just a complicated hash oil recipe?

and you dragged up a 2 year old thread good job!

And an explosive one!

Without proper venting this receipe could become a terminal out of body experience!

1 and 1/2 foot of pvc pipe, 2x end caps . 8 oz butane gas. In one end cap drill a hole small enough for the nozzle of the butane. In the 2nd end cap drill several holes, like a pepper pot. File the inside and ensure all the pipe is clean. in the pepper end place a filter, coffee, tissue paper, whatever. Now fill the pipe with scrap leaf, bud and stems. Replace the end cap. Position over a glass dish and hold in place with clamps. Now slowly empty the entire canister of gas into the pipe through the top single hole.BE CAREFUL NOT TO CAUSE ANY SPARKS, DO NOT SMOKE!!!...When the can is empty retreat from the pipe and wait untill the butane has evaporated. Take the oil in the dish and leave at room temperature untill the remaining gas evaporates.....Presto

done it before, didn't think the yield was worth it.

Also note that Butane, and or IsoButane will leach chemicals from PVC leaving toxins in your products, if your going to play chemist, play with pharmaceutically safe materials....