Alas and alack, my photo chemical source for many years has closed its doors. Tri-Ess Sciences of Burbank, which I used to visit personally and then by mail, is gone. Old Ira Katz is deceased. http://www.tri-esssciences.com/ (Ira invented many of the chemical special effects used in Hollywood such as human fireballs and such.) Anyway, what companies are your favorite suppliers? Certainly Photographer's Formulary. Who else? My (new) ideal source would have: 1. Great prices, of course! 2. A wide variety of chemicals, from sodium sulfite to TEA to chloro-hydroquinone. (Does anyone really have the latter?) 3. Low or no minimum order. 4. Reasonable shipping rates. 5. And of course, great service! Where do you buy your chemicals? Any caveats? Thanks!