if you are making green dragon (pot oil...hash oil is totally different) and are concerned about the chems, use everclear. it comes out not quite as nasty as rubbing alcohol and you can drink it safely. if you want to spend the time and a few bucks a much more worthier product can be had using butane or acetone. all the info for most recipes have alreadey been posted and easily searchible...

then there are those awesome bubblebags...