Properties of disperse dyes

[Tanvir Ahmed Chowdhury]

i) Disperse dyes are molecularly dispersed.
ii) Disperse dyes are very less soluble in water which makes fine dispersion.
iii) The light fastness of disperse dye is fair to good and light fastness rating 4-5.
iv) Washing fasters is mode rate to good. The washing fastress rating is about 3-4.
v) Sublimation- Disperse dye have good sublimation power due to its stable electron arrangement. The sublimation fastness of disperse dye is related to
•   Low molecular size of dye stuff
•   Non ionic group
•   No sulphonatod group.
vi) Color will be fade due to heat application on disperse dye.
vii) In the presence of nitrous oxide, textile mlt dyed with certain blue and violet disperse dyes with anthraquinone dye structure will be fade.