The natural soils in powder are mineral substances of natural origin, consisting of salts, acids and sulphides present in the subsoil in deposits of various depth and stratification. Their colour and resistance characteristics derive from the long geological process of formation and exalted by the successive stages of processing. Available in the form of powder They exploit a high coloring and covering power Insoluble in the vehicle: they are finely dispersed in it Used as a coloring charge in cements, paints and paints Inimitable shades, semi-transparency and resistance to time Used in numerous painting and artistic techniques Chemical composition: mineral oxides of natural origin (celadonites, hematitis, bruises, manganese)