| Bleach |
|---|
| Water | 1 L |
| Potassium Ferricyanide | 100 g |
| Potassium Bromide | 100 g |
| Water to make | 2 L |
| |
| Toner |
|---|
| Solution A |
| Water | 500 ml |
| Thiocarbamide | 50 g |
| Water to make | 1 L |
| |
| Solution B |
| Water | 500 ml |
| Sodium Hydroxide | 50 g |
| Water to make | 1 L |
Mixing instructions: Add chemicals in specified sequence.
Dilution: Mix equal parts A + B, then dilute 1+9 with water. Solutions A, B and bleach can all be stored for several months in opaque bottles. The working solution should be used immediately, although it can be stored for short periods.
Use: Immerse fully-washed print (presoak if previously dry) in the bleach until it turns a faint buff color. Rinse in several changes of water. Redevelop in toner solution for one minute, or until fully redeveloped. Wash.
Notes: For yellow-brown tones make working solution with half the quantity of B.
For deep-brown tones make working solution with double the quantity of B.
