I usually work with the Kodak farmer`s reducer in my photos. I follow the instructions that Kodak give for working with negatives in my papers: Part A (farmer reducer) dissolved in 473 ml of water; Part B (Sodium thiosulfate, anhydrous) also dissolved in 473 ml. Then, I mixed equal part of each stock solution to prepare the final solution that is supposed to be active for, at least, 10 or 15 minutes. I notice that the bleach effect is very slowly. So, I want to ask to the forum: - Am I wrong when I work my papers as Kodak recommendation for negatives? - Ralph Lambrecht recommends mixing 10 cm3 potassium ferricyanide with a litter of water to make a 1% stock solution. This stock solution is mixed 1+1 with fixer to make the working solution that is supposed to work for 10 or 15 minutes. According with his book Way Beyond Monocrome, it works fast and well. Notice that he just uses the part A of Kodak farmer`s reducer, but he ignore the Part B completely. I appreciate any comment, recommendation, etc. Thank you, Henry.