We’ve posted about homemade flux before, but Tom has taken it to a whole new level. He used pine gum straight from the tree for his Flux recipe. He dissolved the rosin in some 99% isopropyl alcohol, and filtered it using coffee filters.
I tried making flux from an even more raw material, pine gum straight from the tree. It had to be filtered, of course, but so far so good — and the turpentine in it hasn’t eaten through my bottle yet. :)
Via the forum.