This clean-working formula is recommended for use with commercial films in reproduction work when a comparatively low maximum denisty is desired. It is also suitable for development of roll, pack and sheet film providing a long scale of tonal gradation.
|Hot Water (125F or 52C)||800 ml|
|Sodium Sulfite, anhydrous||125 g|
|Potassium Carbonate||250 g|
|Water to make||1 L|
TANK DEVELOPMENT: Take one part stock solution, fifteen parts water and develop 20 to 25 minutes at 68 F (20 C). (Ed note – this looks like one of the few places American ounce measurements are superior – one ounce of developer and 15 ounces of water will fill a 120 stainless steel tank.)
TRAY DEVELOPMENT: Take one part stock solution, four parts water and develop 5 to 10 minutes at 68F (20C).
From Ansco Formulas for Black and White Film by GAF, 1948 – Formulas are provided for historical reference. They may not work well with modern films and papers. Some of the chemicals can be dangerous. As with all photographic processes, be careful.