Solution A
Water	300 ml
Potassium Citrate	100 g
Water to make	500 ml
Solution B
Water	200 ml
Copper Sulfate	7.5 g
Water to make	250 ml
Solution C
Water	200 ml
Potassium Ferricyanide	6.5 g
Water to make	250 ml

Mixing instructions: Add chemicals in specified sequence.

Dilution: Pour Solution A into a tray, then add Solution B, and finally add Solution C. Stir thoroughly at each stage.

Use: Immerse prints into toning solution until desired effect is achieved. Wash.