A dye is a coloured compound,normally used in solution,which is capable of being fixed to a fabric. The dye must be ‘fast’or chemically stable so that the colour will not wash with soap and water, fade on exposure to sunlight etc. Dyeing is normally done in a special solution containing dyes and particular chemical material. After dyeing, dye molecules have uncut Chemical bond with fiber molecules. The temperature and time controlling are two key factors in dyeing. Mordanting agents, levelling agents, anti-foaming agents,enzymes, retarders