Extraction of natural dyes for the coloration of textile substrate is one the most important research area to the researchers. These dyes are considered to be very good for their colour experimentation quality, excellent for their endurance and soft lustrous colouring. They do not create any pollution problems as they are applied with simple chemical reactions. The wide verities of exotic shades produced by natural dyes are parallel with the synthetic range and hence can replace them with ease. Natural dyes are being considered as a more environmentally friendly substitute for synthetic dyes. The major advantage of natural dyes is the fact that they are produced from renewable sources. Among the few drawbacks of natural dyes low colourfastness property is one. | Crocking fastness properties of annatto Bixa Orellana dye on cotton mordanted with eco-friendly mordants and post-treated with various dye fixing agents
