Vat Blue RSN（Vat Blue 4）

Vat Blue RSN (C.I. Vat Blue 4) is a premium vat dye renowned for its exceptional depth and intensity of blue coloration. This dye is extensively used in the textile industry for dyeing natural fibers such as cotton and wool, providing vibrant and long-lasting blue shades. Vat Blue RSN is known for its outstanding fastness properties, including high resistance to light, washing, and rubbing. Its ability to form a stable, insoluble dye in the fiber matrix after reduction makes it a preferred choice for high-quality dyeing applications requiring deep and enduring color.

Chemical and Technical Specifications:

• Chemical Name: 4,4'-Diamino-3,3'-dichlorobenzidine

• C.I. Number: 12900

• Molecular Formula: C20H15Cl2N3O2

• Molecular Weight: 370.26 g/mol

• Solubility: Soluble in alkaline reducing agents; forms insoluble dye after oxidation

• Dyeing Method: Vat dyeing

• Lightfastness (Blue Wool Scale): 6-7 (excellent resistance to light exposure)

• Washfastness: Excellent, rated 4-5

• Rubbing Fastness: Good, rated 4-5

• pH Range: Effective in alkaline conditions during reduction

• Appearance: Dark blue powder

Industrial Applications:

1. Textile Industry:
   Vat Blue RSN is extensively used for dyeing cellulosic fibers such as cotton, linen, and viscose. It is known for delivering rich, deep blue shades with outstanding colorfastness, making it ideal for high-quality garments, home textiles, and industrial fabrics.

2. Denim Production:
   This dye is frequently utilized in the denim industry to achieve deep and consistent blue hues. It is particularly effective in creating various shades of blue in denim fabrics, offering versatility and durability in denim production.

3. Yarn and Fabric Dyeing:
   Vat Blue RSN is employed in the dyeing of yarns and fabrics, providing uniform color saturation and exceptional performance. Its ability to produce intense blue tones with excellent fastness properties ensures superior quality in finished textiles.

4. Specialty Applications:
   The dye is also used in specialized applications such as the dyeing of upholstery fabrics and other high-performance textile applications. Its durability and color stability make it suitable for use in demanding environments.

Key Performance Benefits:

• Intense Blue Coloration: Produces a deep, vibrant blue with high tinting strength and excellent color coverage.

• Superior Fastness: Offers outstanding resistance to light, washing, and rubbing, ensuring long-lasting color retention and durability.

• Stable Dyeing Process: Forms a stable, insoluble dye within the fiber matrix after reduction, providing consistent and reliable results.

• Versatility: Suitable for a wide range of textile applications, including garments, home textiles, and industrial fabrics.

• High Performance: Delivers high-quality results with excellent colorfastness, making it ideal for premium and specialty textile applications.