====== Farmer's Reducer (local bleaching) ====== For local bleaching of prints ===== Stock Solutions ===== **Part A** | Potassium ferricyanide, 1%| **Part B** | Sodium thiosulfate (Hypo), 10% | Note: As an alternative to B, one can use ordinary fixer at working strength ===== Instructions for use ===== Mix 1 part of A with 1 part of B; dilute with two parts of water. The working solution is effective for approx 10 min. Reduce proportion of A to get a less powerful bleach. Keep in mind that stronger solutions are better for increasing local contrast. Weaker solutions are better suited for reducing overall print density.