YYZ Skinhead
RIP Neil Peart 9/12/1952 -- 1/7/2020
The first extractions I did were with butane, but reading of residual impurities in BHO (in addition to fear of pressurised flammable gas) made me switch to grain alcohol (ethanol) exclusively. If I could get pure butane that had no extraneous crap in it I would try BHO again, because I liked the result I got. It was amber-colored and had the texture of rubber cement.