hi, here's the recipe... This formula is from Patrick Dignan's book Classic B&W Formulas. Solution A Sodium Sulfite, 35 grams - Hydroquinone, 6 grams Phenidone, 0.2 grams - Sodium Bisulfite, 6 grams Water to make, 1 liter Solution B Sodium Sulfite, 65 grams - Sodium Metaborate, 20 grams Or, Borax 20 grams, for results "like that of D76" Water to make, 1 liter Mr. R. W. Anderson who wrote the article, claims a true one stop speed boost plus "the advantages ... of a two bath". .... normally you'd have all the sodium sulfite in bath A ... right? what is the function of the sodium sulfite in the bath B? thanks.