Developer for blue/black tones on contact papers (such as Gevaert “Ridax” paper).
| Ingredient | Quantity | |
|---|---|---|
| Metol | 2.5 | grams |
| Sodium sulfite anhydrous | 25 | grams |
| Hydroquinone | 6 | grams |
| Sodium carbonate anhydrous | 40 | grams |
| Potassium bromide | 0.5 | grams |
| Water to make | 1 | liter |
| Do not dilute. | ||
Develop papers for 1 minute at 20°C.