Colorants are classified as either organic or inorganic depending on the chemistry. Both organic and inorganic colorants are available in dry form or liquid form dispersed in an oil. Organic colors were originally called coal tar or anilines because they were derived from coal sources. However, nowadays almost all organic colorants are synthetic and are available as either water soluble, oil soluble or insoluble (= Lakes) agents in all kinds of shades. Inorganic colorants are composed of insoluble metallic compounds which are either derived from natural sources (e.g. china clay, carbon deposits) or synthesized.