Reducer for over-developed negatives.

IngredientQuantity
Mix chemicals in order.
Solution A
Potassium permanganate4
grams
Water to make
1
liter
Solution B
Sulphuric acid2mililiters
Water to make1liter

Both Solution A and Solution B keeps well. For use take 100 mililiters of water, add 15 mililiters of Solution A, then 15 mililiters of Solution B. After reduction, fix for several minutes in an acid fixing bath and then wash thoroughly.

Permanganate reducer does not act so energetically as G503 and G504 but it has the advantage that it can be used repeatedly.