This is a rapid developer for commercial use with fast enlarging papers, producing neutral black tones.
| Ingredient | Quantity | |
|---|---|---|
| Metol | 3.3 | grams |
| Sodium sulfite anhydrous | 33.5 | grams |
| Hydroquinone | 10 | grams |
| Sodium carbonate anhydrous | 56 | grams |
| Potassium bromide | 3.3 | grams |
| Water to make | 1 | liter |
| Mix chemicals in order. | ||
Dilute 1:2 and develop for 1–2 minutes at 20°C.