FerroTint F9550 Black Iron Oxide is one of our most economical black pigments. This pigment does not go through the extensive processing of our “Best or Better Series” pigments, but it still provides the quality needed for many applications. Designed for use in cement-based building products, F9550 is processed to eliminate costly production steps. Like all Black Iron Oxides, F9550, has excellent lightfastness and chemical resistance. In normal applications it is considered a permanent pigment. While weaker than typical Carbon Black pigments, Black Iron Oxides are more compatible with water base systems. Black Iron Oxides also have the unique property of being magnetic, since they are based on the mineral Magnetite.