You all are talking some crazy talk - very interetsing though, I have to say. I usually just make a tincture using 190pf EC along with some nice crytaly greens. Nothing spectaular, but fun just the same. A couple drops under the toung and you got yourself I nice head change.

I'm considering the butan method though ... sound very interesting. Anyone given the thought to methonal (ethyl alcohol) I believe its 200pf (pure alcohol - moonshine so to speak, just pharm grade).

For those of you who cant get regular alcohol about 75.5% (151pf), here is a drying method to rid the "wet" protions in the alcohol; making it 200pf:

Quote Originally Posted by Dr.D, from another board I frequent
Incase you wanted to make your own 200 Proof grain alcohol, here you go. These are directions on how to "dry" 750ml of "wet" 151 proof alcohol (either Baccardi or EverClear):

If you want to use "wet" alcohol, you just have to dry it out first. Get a desiccant like MgSO4 (common epsom salt). Dry it at 400'F for at least 4-6 hours and put it in a few coffee filters. Then slowly pour your alcohol over it while it's in a funnel. The salts catch the water and the dehydrated alcohol runs through. It's a sinch.

750ml of 151pf alcohol (75.5%) will yield 566.3ml of absolute, dehydrated alcohol (200pf). That means 183.7ml H2O must be removed. Each mole of MgSO4 can hold 7 moles of water, which corresponds to slightly over it's molecular weight or 105% it's weight in water (assuming it is totally dry) so roughly 175g of dried salts. I'd use about 300g though because it makes it much easier when you don't have to achieve 100% efficiency, that would get slow toward the end. You have to make a drying tube like I instructed you (a big funnel) and pour the alcohol in 2 equal portions over ~150g of salt each. Unless you have an enormous funnel, I'd just do 100ml alcohol at a time and then recharge the system with new filters and salt before the next round. The surface of the salts will get hard as it collects water. Occasionally you may need to break up the salts and mix them around in the funnel (about 4 coffee filters being used). Just don't puncture the paper when you do this.
Works well, I've done it several times. You just have to watch out for the finer particals of epsom, They get through the coffee filter. for that you'll need a whatman filter # 40 and/or up. You can find those at:

http://www.whatman.com/products/?pageID=7.25.5.11

Anyway ... just thought I would share. You all got some good ideas here. Cant wait to try yours. Thanks ...