The DARKROOM COOKBOOK, Third Edition

FORMULA #45
Keelan’s Monobath
(H.S. Keelan)
Water, 500.0 ml
Sodium sulfi te, 50.0 g
Phenidone, 10.0 g
Hydroquinone, 15.0 g
Sodium thiosulfate, pentahydrate, 110.0 g
Sodium hydroxide, 18.0 g
Potassium alum, 18.0 g
Water to make 1.0 liter
Formulas 229
Dissolve the alum separately and add to the solution after all the other ingredients are completely
dissolved.
Add the Phenidone to the water; do not mix. Add a pinch of hydroquinone and place
the rest aside. Add the remaining ingredients in the order given. Mix well to dissolve the
Phenidone. Add the remainder of the hydroquinone and then the alum.
Caution: Dissolve the sodium hydroxide in a small volume of water in a separate container
before adding it to the solution of the other constituents.
FORMULA #46
Orlando’s Monobath
(C. Orlando)
Water, 750.0 ml
Metol, 12.9 g
Sodium sulfi te, 70.9 g
Hydroquinone, 25.7 g
Sodium thiosulfate, pentahydrate, 180.0 g
Sodium hydroxide, 25.7 g
Benzotriazole, 10.0 g
Water to make 1.0 liter
Caution: Dissolve the sodium hydroxide in a small volume of water in a separate container
before adding it to the solution of the other constituents.