Dyeing of Polyester and its Blends with Some Disazo Dyes Derived from the Disodium Salt of Chromotropic Acid and their Chelates with Transition Metal Ions

Disazo dyes derived from the disodium salt of chromotropic acid and their chelates with metal ions were applied on polyester, polyester/cotton and polyester/wool blend fibres as disperse dyes. The fastness to washing, perspiration, rubbing and light of the resultant dyeings were measured. The bonding of dye or its complexes to the fibre and the effect of substituent groups on the colour fastness of the dyes are discussed