Without colour, life is incomplete. Dye refers to the compounds that give
goods their colour. Even though natural dyes have been used for generations, their
limitations have led to the development of synthetic dyes. By addressing the history
and significance of natural dyes, the limitations of natural dyes, the introduction of
synthetic dyes, the negative effects of synthetic dyes, and an overview of several
techniques used for the treatment of disposed dyes in the environment, this chapter
serves as a foundation for the discussion of the entire upcoming book. The goal of this
chapter is to provide a brief overview of the need for and the concept of dye
degradation.
Keywords: Colour index, Degradation, Natural dyes, Oxidation, Synthetic dyes.