An active developer formula for use on chloride contact papers to produce cold blue-black tones.
Ingredient | Quantity | |
---|---|---|
Metol | 2.7 | grams |
Sodium sulfite anhydrous | 40 | grams |
Hydroquinone | 10.5 | grams |
Sodium carbonate anhydrous | 75 | grams |
Potassium bromide | 0.8 | grams |
Water to make | 1 | liter |
Mix chemicals in order. |
Dilute one part of stock solution with two parts of water and develop prints from 1.5–2.5 minutes at 20°C.