Originally Posted by bobbooty

if you are a purist, the best you can do is bubble hash, wet or dry, sieving.

if you are searching for the best, most potent form of thc, that would be the butane honey oil. hands down. crude BHO is what most of us know it as, it can then be purified, if one has the chemistry knowledge, you can purify the amber'd/brown colored honey oil to a completely clear appearance, hence no impurities. not too many people have this kind of knowledge or access to the tools needed to do this, which is why you dont see this form (clear hash oil) around much. but, i bet this clear BHO is the bomb, lol.

there is much discussion over the health effects of the chemicals used, to make BHO and whether or not the "bad" chemicals used to make the BHO are present enough after production, to be of health concern. there is plenty of debate over the possible health effects. i suggest reading, and making your own decisions.