Sulphur Dyes

What Are Sulphur Dyes ?

Discover the world of sulphur dyes, an affordable and versatile option for dyeing cellulose fibers like cotton, rayon, and viscose. Known for their excellent color depth and earthy shades, sulphur dyes are a popular choice for creating rich, long-lasting textiles with a unique, timeless appeal.

Sulphur dyes, also known as sulfur dyes or thio dyes, are characterized by their insolubility in water, requiring a reducing agent to convert them into a soluble form for dyeing. This process ensures that the dye molecules penetrate the fabric fibers deeply, resulting in impressive washfastness and color stability. The color palette of sulphur dyes is dominated by dark, earthy tones such as deep browns, blues, greens, and blacks, making them ideal for creating sophisticated, understated designs. The rich, muted shades of sulphur dyes lend themselves perfectly to a variety of applications, from casual wear and home textiles to industrial fabrics

Dyeing

At first dye solution is taken in a dye bath & the fabric is immersed in that solution. Then it is heated for 10-15 minutes. Then half of the total NaCl solution is added and temperature is raised to boil & then the rest amount of NaCl is added. Dyeing at this temperature is continued for about 30 minutes. Then the steaming is turned off and the application continued in cooling liquor for a further half hour. This steaming helps to diffuse the dye in to the fabric before fixing. Retained dye liquor should be rinsed out immediately from the surface of the fabric.