Farmer's Reducer - SUBTRACTIVE

For overexposed or fogged film

Solution A
Water300 ml
Potassium Ferricyanide40 g
Water to make500 ml
 
Solution B
Water1L
Sodium Thiosulphate (Hypo)450 g
Water to make2 L

Mixing instructions: Add chemicals in specified sequence.

Dilution: to 1L of water add 30 ml of Solution A and 30 ml of Solution B.

Use: Pour solution into a white tray and immerse a wet negative. Agitate gently. Watch the action carefully and remove the negative as soon as the desired density is achieved. Immerse immediately into running water to stop the action. Wash thoroughly. The mixed solution has a short life, but the process can be repeated with fresh solution for further effect. To slow down the action increase the proportion of water in the working solution.