Dyeing with sulfur dyes
Summary :
Table of Contents
- Introduction
- Chemical constitution of sulfur dyes
- Dyeing with sulfur dyes
- Classification of sulfur dyes
- The reduction of sulfur dyes
- Dyeing of cotton with soluble form of sulfur dyes
- Two -bath padding method
- Bibliography
Abstract
sulfur dyes are mainly used for dyeing cellulosic fibers for corduroy articles, work wears and men's outer wear (woven and knitted goods) and lcisurewcar. Polyester/cotton blend fabric is another important area of application of sulfur dyes. Silk, paper and leather are also dyed to a limited extent. sulfur dyes are much used for raincoat and other matcraIs which are subsequently rubber coated and vulcanized. Current literature shows a wider area of sulfur dyes for dyeing various fibers such as Tencel [11, silk [2] and nylon [3].
The consumption of sulfur dyes for the dyeing of cellulosics is estimated at 70,000 ton per annum. By far the largest proportion of this quantity is sulfur blacks for heavy shades to get umbrella cloth. sulfur blue is also most important member of this class for dyeing knitwear. The remaining proportion is made up of yellows, browns, greens and red browns. sulfur dyes represent a wide range of shade having good to excellent fastness to washing and light at relatively low cost compared to any other class of dye. Most sulfur dyes give dull shades and hence they can be dyed on unbleached or even grey material. sulfur blues and greens are brightest and the best of the sulfur dyes. sulfur dyes are not fast to chlorine bleach.
The consumption of sulfur dyes for the dyeing of cellulosics is estimated at 70,000 ton per annum. By far the largest proportion of this quantity is sulfur blacks for heavy shades to get umbrella cloth. sulfur blue is also most important member of this class for dyeing knitwear. The remaining proportion is made up of yellows, browns, greens and red browns. sulfur dyes represent a wide range of shade having good to excellent fastness to washing and light at relatively low cost compared to any other class of dye. Most sulfur dyes give dull shades and hence they can be dyed on unbleached or even grey material. sulfur blues and greens are brightest and the best of the sulfur dyes. sulfur dyes are not fast to chlorine bleach.
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