1) Chemical
classification :
I.
Nitro dyes
Example : dispersal fast yellow A, Serisol yellow 2G
II.
Amino keton dyes :
Example : Gelliton fast green 3B
III.
Anthraquinonoid dyes
Example : duranol violet 2R, duranol brilliant blue G
IV.
Monoazo dyes
Example : cibacel orange 2RD
V.
Diazo
Example : celliton fast yellow 5R,
2) According
to fastness properties :
There are four types:-
i.
Group A : these dyes have excellent dyeing
properties and good fastness. E.g. C.I. disperse Red 5, C.I. disperse Orange 3
ii.
Group B : these dyes are excellent in high
temperature and for carrier dyeing, with moderate fastness. E.g. Disperse
Yellow 1,Disperse Blue.
iii.
Group C : these dyes are moderate for carrier
and high temperature dyeing with higher fastness properties than Group-B dyes. E.g.
C.I disperse Violet 3, Disperse Orange 13.
iv.
Group D : these dyes are of excellent high
fastness to that but poor dyeing properties on carrier dyeing. E.g. Disperse Orange
32, Disperse Yellow 63.
3) According
to energy requirement :
There are three types :-
i.
Low energy dye : these dyes are used to dye with
carrier. For dyeing 77degree C temperature is required. They have extremely
poor resistance to sublimation.
ii.
Medium energy dyes : these dyes are used to dye
mostly in between temperature 104 to 10 degree C which provides better
sublimation fastness than that of low energy dyes.
iii.
High energy dyes : these dyes are used to dye at temperature
above 129 degree C and are suitable for continuous dyeing. They provide good
fastness.