Pyrocatechin is well suited to development of color separation positives for dye-tone transparencies.

IngredientQuantity
Mix chemicals in order.
Solution A
Pyrocatechin
20
grams
Sodium sulfite anhydrous40grams
Water to make1liter
Solution B
Potassium carbonate anhydrous120grams
Water to make1liter

For tray development dilute 1:2:1. Develop 4—6 minutes at 18.5°C.