eco-friendly dyes

  are dyes or colorants derived from plants, invertebrates,a or minerals. The majority of natural dyes are vegetable dyes from plant sources from roots, berries, bark, leaves, and wood and other organic sources such as fungi and lichens

  Substances that add color to textiles. They are incorporated into the fiber by chemical reaction, absorption, or dispersion. Dyes differ in their resistance to sunlight, perspiration, washing, gas, alkalies, and other agents; their affinity for different fibers; their reaction to cleaning agents and methods; and their solubility and method of application. Various classes and types are listed below.

To extract colour   Solvent extraction There is use of organic solvents such as acetone, petroleum, ether, chloroform and ethanol in the extraction of natural dyes. It is a very viable technique as compared to aqueous extraction. The yield of dye is good, and the quantity of water requirement is less. The extraction is done at lower temperature