Direct Fast Black G (Direct Black 19)

Direct Fast Black G (C.I. Direct Black 19) is a high-quality direct dye known for its deep, rich black color and exceptional performance. It is designed for application on cellulosic fibers, including cotton, linen, and rayon. This dye provides a strong, uniform black shade with excellent color strength and fastness properties, making it ideal for a range of textile, paper, and consumer goods applications.

Chemical and Technical Specifications:

• Chemical Name: 1,4-Diamino-2,5-dihydroxybenzene sulfonic acid

• C.I. Number: 19

• Molecular Formula: C15H12N2O6S2

• Molecular Weight: 332.39 g/mol

• Solubility: Soluble in water; forms a stable dye solution

• Dyeing Method: Direct dyeing

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

• Washfastness: Excellent, rated 4-5

• Rubbing Fastness: Good, rated 4

• pH Range: Effective in neutral to slightly alkaline conditions during dyeing

• Appearance: Deep black powder

Industrial Applications:

1. Textile Industry:
   Direct Fast Black G is extensively used in the textile industry for dyeing cellulosic fibers such as cotton, linen, and rayon. It provides a rich, deep black color with superior wash and lightfastness, making it suitable for high-end apparel, home textiles, and industrial fabrics.

2. Paper Industry:
   This dye is utilized in the paper industry to achieve intense black shades in various paper products, including packaging materials, office papers, and specialty papers. Its high color strength ensures vibrant and consistent black coloration.

3. Inks and Coatings:
   Direct Fast Black G is also applied in the formulation of inks and coatings, offering deep black hues with reliable performance. It is ideal for applications requiring high color intensity and stability.

4. Consumer Goods:
   The dye is used in consumer goods such as bedding, upholstery, and curtains, providing a rich black color with excellent durability and colorfastness.

Key Performance Benefits:

• Intense Black Coloration: Produces a deep, rich black color with high color strength and uniformity, enhancing the visual appeal of finished products.

• Superior Fastness: Ensures excellent resistance to light, washing, and rubbing, resulting in long-lasting color retention and durability.

• Reliable Dyeing Process: Forms a stable dye solution in aqueous conditions, ensuring consistent and high-quality dyeing results.

• Versatile Applications: Suitable for cellulosic fibers, paper products, and inks, making it adaptable for a wide range of industrial and consumer uses.

• Enhanced Durability: Offers exceptional colorfastness and resistance to fading, making it ideal for products that require robust performance.