This color contains the following pigments:
FeO or Fe2O3
Mars Black is an opaque black with a strong and cool masstone, a slightly warm tint, and a warm brown undertone. It is not as black as Ivory Black, but it dries more quickly and has three times the tinting strength. Mars Black is normally the only black available in acrylic form and that is safe to over paint. It can be used in all media without reservation and is widely used as an alternative to Lamp Black and Ivory Black.
Mars Black is very lightfast with excellent permanence.
Mars Black has no significant hazards and is the only major black pigment considered non-toxic.
The word Mars refers to the Roman god of iron and war. Mars Black was developed in the early 20th century from inorganic, synthetic iron oxide.
Bismuth Oxychloride is a silvery white pigment with low tinting strength, often mixed with light value pigments to create subtle pearl and iridescent effects.
Bismuth Oxychloride is permanent and lightfast.
Bismuth White is used in cosmetics. Although it is considered non-toxic, the fine powder is an irritant. Some persons are allergic to it. It may cause itching, rashes and mild to severe cystic acne. BIsmuth itself is a heavy metal, but it is the least tox
Bismuth is a byproduct of mining tin and lead. The element Bismutch was first described during the 8th century by Abu Musa Jabir ibn Hayyan, a chemist who lived in the Umayyad caliphate. Bismuth Oxychloride and other bismuth salts have bee produced since the 19th century. Bismuth Oxychloride is best known as a silky white powder that is added to cosmetics to impart a pearlescent effect. It provides excellent whiteness, brightness and a smooth texture.