The goal of the work was verification of utilization of metallurgical wastes-sludge from Nova Hu, a.s. Ostrava, Tøinecké železárny, a.s. Tøinec and Vítkovice, a.s. as a pigments. Here as samples originated as waste materials during iron production there was assumption of their utilization as ferric pigments. However neither by application of bacterial leaching or calcination, quality of these materials corresponding to their utilization as ferric pigments was, not obtained. When succeeded produce material with fine red colour, thus leach of given treated waste was unsatisfactory.