Aniline

Dye is a chemical solution used to produce long-lasting colors in materials. The textile industry uses dyes to color fibers, yarns, and fabrics.… See more » Catechu, KAT uh choo, also called black cutch, is a brown, tarlike or resinlike substance obtained chiefly from the wood of acacia trees. It is… See more » Indigo, IHN duh goh, is a deep blue dye used to color cotton and wool. It is also called indigotin. In past times, this dye was taken from the… See more »