ABSTRACT
Abstract: Disperse dyes are water insoluble and non-ionic dyes and are used to dye manmade fibres in acidic medium. The dye has been assigned such a name because of the use of dispersing agent to retain dyes in fine dispersion. Grinding is an important process to control particle size for ease in diffusion and migration of disperse dye. Due to their application invariably at higher temperature, a part of few of dyes is sublimised-off necessitating their classification based on stability against sublimation. Dyes are retained by fibre with physical forces. Fastness properties are excellent on polyester except in certain cases.
