Energetic positive developer giving vigorous results. Producing pure black to blue-black tones on chloride paper, and pure black tones on bromide enlarging paper.
|Mix chemicals in order.|
|Sodium sulphite anhydrous||25||grams|
|Sodium carbonate anhydrous||37.5||grams|
|Water to make||1||liter|
Do not dilute as solution is ready for use.
Times of development:
- For contact printing papers (gas-light): 45–60 seconds.
- For enlarging papers (chloro-bromide and bromide): 1.5–2 minutes.
Keeping qualities and use: The solution keeps well and is very economical in use.
Note: To increase the capacity of the developer for blue-black tones on contact printing papers (gas-light), and pure black tones on enlarging papers (bromide), add a developer improver.