Table of Contents

Pre-development bleach

To reduce contrast in prints and open-up shadows.

This bleach is applied post exposure but pre-development. The bleach primarily affect shadow regions.

Preparations

Prepare a stock and then working solution as described below:

Stock solution A
(Ferri 0.1%)

Potassium Ferricyanide 1 gr
Water, to make 1000 ml

Working solution
(Ferri, 0.001%)
Mix 1 part stock solution A with 99 parts water (10ml + 990ml)

Instructions for use

  1. Expose print. Print with increased contrast, 1 grade extra or more.
  2. Soak print in a 'one-shot' working solution of bleach, treat for approx 1-3 min.
  3. Rinse print in water
  4. Develop, stop and fix.
  5. Wash

To alter the effect, adjust strength of the 'one shot'-bleach. Try 0.01% - 0.001% (1+9 - 1+99).