Direct Black Dyes

Direct Black Dyes – Deep, Uniform, and Cost-Effective Coloring for Paper

Direct Black Dyes are high-performance anionic dyes widely used in paper coloration, offering deep black shades, excellent penetration, and uniform coloring. They are especially suitable for cellulose fiber-based pulps, providing strong affinity and easy application in both continuous and batch dyeing systems.

With good solubility, stable shade, and high color yield, Direct Black Dyes deliver consistent results under neutral and slightly alkaline papermaking conditions. They are also compatible with retention aids and fixing agents, ensuring efficient dye retention and reduced color loss in white water systems.

Key Features & Advantages:

• Deep and uniform black shade with strong tinting strength

• Excellent solubility and easy to use in papermaking systems

• Stable color performance under various pH conditions

• Cost-effective solution with good retention efficiency

• Compatible with anionic and cationic papermaking additives

Applications:

• Coloring of packaging paper, kraft paper, and decorative paper

• Suitable for tissue and printing papers requiring deep shades

• Applicable in both batch and continuous dyeing operations