Electrostatic developer mix containing either MoS2, TiS2, WS2 or graphite as lubricant

摘要

A dry electrostatic developer mix having improved fatigue-resistance properties, is realized by adding to the developer mix, which contains carrier particles and pigmented toner particles, molybdenum disulfide in amounts ranging from about 0.005% to about 1.0% preferably in the range of from about 0.009% to about 0.2% based on the weight of carrier particles present in the developer mixture.