Solution A
Water at 125° F (52° C)
500 cc
Hydroquinone
45 g
Sodium sulfite, desiccated
30 g
Sulfuric acid, concentrated
4 cc
Cold water to make
1 liter
Solution B
Water at 125° F (52° C)
500 cc
Sodium carbonate, desiccated
30 g
Potassium carbonate
90 g
Potassium bromide
8.3 g
Sodium sulfite, desiccated
90 g
Add cold water to make
1 liter |