Blanc Fixe N: It is a synthetic barium sulphate produced from highly purified solutions in a defined growth process. The product is resistant to acids and alkalis, insoluble in water and organic solvents. It is color neutral due to low refractive index (1,64 of BaSO4). The low specific surface area (<5 m2/g) and low abrasiveness (due to low Mohs hardness of ca. 3) make BLANC FIXE N easy to wet and disperse.