Black substance is a term used to describe a variety of materials that are dark in color. TAR, which is a viscous liquid made from the distillation of organic material, is one example of a black substance. PITCH is another type of black substance, which is a thick, sticky, and highly flammable substance derived from the distillation of COAL TAR. SOOT is a black powdery or dusty substance that is produced by the incomplete combustion of organic matter. COAL is a black sedimentary rock that is composed of carbon and is used as a fuel source.