ermmm im not sure been fascinated (cant spell!) about how you can make absynth a kinda of hullucinogenic i dunno....xNoa, from what ive bin reading on the net its basically wood alcohol that develops during the fermenting process...various other people states different values of which you should discard. Some say 100ml...some say 50ml but i think to be safe ill throw away bout 150ml...I think when they say first and last 100ml it could possibly be all to do wi the temp of thw wash, naybe if its at a too low temp at the start and end of the distilling process but im not sure...look up more i shall!