Mars Black is a widely used pigment with a high rating for opacity, lightfastness and permanence. It is completely opaque with a warm, brownish undertone.; Sennelier gathers only the finest organic and inorganic pigments from around the world. These pure pigments are ground very slowly with extreme care to an extra-fine consistency. They are then combined at maximum concentration with an archival safflower oil to yield the highest possible tinting strength and a rich satin finish. This paint has a unique buttery texture.