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In
their normal state Sulphur dyes are insoluble in
water but are readily soluble in the solution of
Sodium Sulphide. In this form they have high
affinity to the all cellulose fibres.
The main advantage lays in their cheapness, ease of application and good wash-fastness. The only disadvantage of the Sulphur dyes that they produce dull shades and lack a red.
It dyes all cellulose fibres, but particularly linen and jute, to a lustrous and deep black with excellent wash and light fastness. The use of Sulphur dyes is restricted to dull brown, Khaki and Navy shades, where a good wash but not boil-fastness is required. Most Khaki and Navy overalls are dyed with Sulphur dyes. An outstanding member of this family is Sulphur black.
Sulphur colors are excellent for dyeing cotton hosiery and other knit goods in dark colors or blacks. The sulphur dyes contain sulphur in one form or another. Nearly all colors except reds have been produced in this chemical group. The sulphur blacks, blues, and browns are among the fastest produced. |
