Optimization of color in the mechanochemical activation of clays

A method for the mechanochemical activation and simultaneous color optimization of mineral material, characterized in that the mechanochemical activation and simultaneous color optimization take place in a first high-energy mill (40), wherein the mineral material is ground together with a solid reducing agent in the first high-energy mill (40) and wherein the mechanochemical activation of the mineral material causes an increase in the R3 value (7d) according to ASTM C1897-20 by at least 150 J/g, preferably by at least 250 J/g.