big snippy... Richard mentioned... Groceries used to carry Red Devil Lye, perfectly pure sodium hydroxide, and also 20 Mule-Team Borax, also pure enough for photographic uses. Both are useful in themselves but can be combined in solution to form "Kodalk" AKA sodium metaborate, pentahydrate (although Kodak called it octahydrate). You may not remember Richard, but i went out and bought 100 lbs of both because Kodalk is so expensive. I have been making my own for some time and it costs me 1/8th of what Kodalk would cost. Robert Hall www.RobertHall.com