Water, about 125ºF (50ºC) - 80 fl. oz. - 2,400mL - 100 fl. oz.
Sodium Thiosulfate (Hypo) - 3 lbs. - 1,440g - 3 lbs. 9 5/8 oz. avdp.
Ammonium Chloride - 6 3/4 oz avdp. - 200g - 8 1/8 oz. avdp.
Sodium Sulfite, desiccated - 2 oz. avdp. - 60.0g - 2 3/8 oz. avdp.
Acetic Acid (28% pure) - 6 fl. oz. - 192mL - 7 1/2 fl. oz.
Boric Acid, crystals - 1 oz. avdp. - 30.0g - 1 3/16 oz. avdp.
Potassium Alum - 2 oz. avdp. - 60.0g - 2 3/8 oz. avdp.
Cold Water to Make - 1 U.S. gallon - 4.0L - 1 Imp. gallon
U.S. Customary and metric measurements are exact. Imperial measurements are accurate to within 1/16 oz. avdp. Imperial liquid volumes are exact and have been correlated in the proportion of 4 U.S. fl. oz. : 5 Imp. fl. oz.
What is this formula supposed to do? I know it is a fixer, I'm just wondering why I would choose to use it.