Water, about 125║F (50║C) - 14 fl. oz. - 425mL - 17 1/2 fl. oz.
Sodium Sulfite, desiccated - 2 oz. avdp. - 60.0g - 2 3/8 oz. avdp.
Acetic Acid (28% Pure) - 6 fl. oz. - 190mL - 7 1/2 fl. oz.
Potassium Alum - 2 oz. avdp. - 60.0g - 2 3/8 oz. avdp.
Cold Water to Make - 32 U.S. fl. oz. - 1.0L - 40 Imp. fl. oz.
If it is desired to mix a stock hardener solution, use Kodak F-1a, adding one part of cool hardener to four parts of cool 25% hypo solution (2 pounds of hypo to the gallon of solution).
This was abandoned internally in favor of F-5.