mr_happy2: The oil obtained from acetone is black, has what I consider to be the usual hash taste, and will get you very much stoned. SWIP could tell the C4H10 was better, but he only was able to get ~1g per 1/2oz (4x tried, 3x used different green). From acetone, he got 3.5g per 1/2oz, but it will induce massive caughing fits. Also, used some grain alcohol back in the day (didn't know any better), and got a green oil (chlorophyl (sp?) contaminated) that still was able to get one well stoned.
PB
BTW, on larger scales, I thought I read somewhere that acetone soak for one week was most efficent means of extraction. Am I mistaken?