Sulphur Black BR（Sulphur Black 1）

Sulphur Black BR (C.I. Sulphur Black 1) is a highly effective sulfur dye renowned for its deep black coloration and superior performance on cellulosic fibers such as cotton and rayon. This dye is favored for its excellent fastness properties, including resistance to light, washing, and rubbing. Sulphur Black BR is widely utilized in various industrial applications due to its stability, strong affinity for fibers, and versatility in both exhaust and continuous dyeing processes. It is an ideal choice for producing high-quality black textiles with lasting color integrity.

Chemical and Technical Specifications:

• Chemical Name: 1,4,5,8-Tetraaminoanthraquinone

• C.I. Number: 13010

• Molecular Formula: C22H14N4O2

• Molecular Weight: 366.37 g/mol

• Solubility: Soluble in alkaline reducing agents; forms leuco dye for application

• Dyeing Method: Exhaust dyeing, continuous dyeing

• Lightfastness (Blue Wool Scale): 4-5 (good resistance to light exposure)

• Washfastness: Excellent, rated 4-5

• Rubbing Fastness: Good, rated 4-5

• pH Range: Effective in alkaline conditions during reduction

• Appearance: Black powder

Industrial Applications:

1. Textile Industry:
   Sulphur Black BR is predominantly used for dyeing cellulosic fibers such as cotton and viscose. It delivers a rich, deep black color with excellent fastness properties, making it suitable for various textile products including garments, home textiles, and industrial fabrics.

2. Denim Production:
   In the denim industry, Sulphur Black BR is used to create intense black shades in denim fabrics. It is often combined with other dyes to achieve a range of black tones and effects, providing versatility and durability in denim applications.

3. Yarn and Fabric Dyeing:
   The dye is employed in yarn and fabric dyeing, ensuring consistent and high-quality black coloration. Its strong adhesion to fibers and resistance to color fading make it ideal for use in woven and knitted fabrics.

4. Leather Dyeing:
   Sulphur Black BR is also used in the leather industry to produce black leather products. Its durability and fastness properties ensure that the leather maintains its rich black color through extensive use and exposure.

5. Paper Industry: This dye can be used in the paper industry to produce black or dark shades on various paper products.
   

Key Performance Benefits:

• Deep Black Coloration: Provides a deep, intense black color with excellent coverage and uniformity across various substrates.

• High Fastness Properties: Exhibits strong resistance to light, washing, and rubbing, ensuring long-lasting color retention and durability.

• Versatile Application: Suitable for both exhaust and continuous dyeing processes, offering flexibility in industrial dyeing operations.

• Stability in Alkaline Conditions: Performs effectively in the reductive dyeing process, making it reliable for industrial-scale applications.

• Cost-Effective: Provides high performance at a competitive cost, making it an economical choice for large-scale dyeing projects.