Kodak's F-24 fixer modified by Gorden Hutchins's is: Water 3 quarts hot (125) Hypo 4 cups Sod.Sulfite 1 heaping tablespoon (40gm. or 22cc bulk) Sod.Bisulfite 1/3 cup (100gm or 73cc bulk) Water to make 1 gallon. I have used this formulation and found it very satisfactory. Pat(posted 9102 days ago)