A study was undertaken of the kinetics of the black Fe-Cr oxide pigment synthesis process based on the oxide constituents (Fe2O3 and Cr2O3). A kinetic model is proposed which enables correlating the degree of transformation advance, expressed as the mass fraction of the arising solid solution (of the same composition as the starting oxide mixture), with synthesis time and temperature. The model is valid for raw materials, range of starting compositions, and operating conditions similar to those used in black Fe-Cr oxide pigment processing in industry.