Wolfram, the classic Windisch developer was only meant to be stored as a two part solution. The instructions state that parts A and B should be mixed a short time before use.(posted 8571 days ago)
The formula I have is:
Part A:
Pyrocatechine ------12.5 gm
Sodium Sulphite ---- 80 gm
Water to ------- 1 litre
Part B:
Sodium Hydoxide ----- 60 gm
Water to ------- 600 cc.
The working solution is made by taking 25 cc of part A, 15 cc of part B, and making up to 1 litre with water.