 Armed Forces Developer #4 (High Contrast)
Armed Forces Developer #4
This is a high contrast developer for aerial films and for other low-contrast situations.
Distilled water (50°C) ................. 750 ml
Sodium sulfite (anhy) .................. 25.0 g
Hydroquinone ........................... 10.5 g
Phenidone .............................. 0.25 g
Sodium carbonate (mono) ................ 45.0 g
Potassium bromide ...................... 1.0 g
Benzotriazole .......................... 0.1 g
Distilled water to make ................ 1.0 l
Usage
Use full strength. | 
Linear Mode
