Table of Contents

Farmer's Reducer (Kodak R4a)

Substractive bleach for overexposed or fogged film.

Substractive…

Preparations

Prepare stock solutions as described below:

Part A

Water, 300 ml
Potassium Ferricyanide, 37.5 gr
Water, to make 500 ml

Part B

Water, 1000ml
Sodiumthiosulphate, 480 gr
Water, to make 2000 ml

Finally, prepare working solution as specified below:

Working solution

Water, 850ml
Part A, 30 ml
Part B, 120 ml

Instructions for use

  1. Soak the film in water.
  2. Put the wet film in a tray of working solution, agitate carefully.
  3. Inspect and remove film from tray as soon as density is sufficiently dense, or slightly before.
  4. Apply a quick rinse in water to abort further bleaching.
  5. Inspect and repeat if needed.

For prints

Mix 10-14 parts of water with 1 part of A and 1 part of B.

Notes

For a weaker solution, keep proportion of part A and part B and dilute in more water.