Pigments for Paper and Fiber Coloring

Coloring Solutions for Pulp and Textiles

Deqing Demi Pigment Technology Co., Ltd. offers specialized inorganic pigments suitable for mass coloration of paper, cardboard, and various fiber materials. Our pigments are chosen for their small particle size, which is essential for uniform distribution and minimal impact on the physical strength and integrity of the fiber structure. We provide reliable coloring materials that meet the demanding aesthetic requirements for packaging, specialized papers, and colored fiber products, maintaining color brightness and lightfastness.

Fiber and Pulp Applications

• Packaging and Cardboard: Coloring for boxboard, liners, and specialty packaging materials.
• Construction Paper: Integral coloring of school and craft papers.
• Molded Fiber Products: Coloring for eco-friendly molded pulp containers and protective inserts.
• Textile Printing (Specific Types): Coloring of coatings and backings for certain synthetic and natural fibers.

Paper Grade Performance Data

Fiber Coloring Specific Advantages

• Low Abrasion: Minimizes wear and tear on sensitive paper machine equipment (e.g., pumps, screens).
• Easy Wetting: Surface properties promote rapid and complete dispersion in aqueous pulp slurries.
• Uniform Retention: Engineered to integrate efficiently with common retention aid systems, optimizing yield.
• Non-Bleeding: The inherent insolubility ensures the color remains fixed in the finished paper or fiber matrix.

• Q: Why is low abrasiveness important in paper applications?

  A: Low abrasiveness is critical to prolong the operational life of highly sensitive and expensive paper machine components, such as pumping systems and wires. High-abrasion pigments lead to increased maintenance downtime and component replacement costs.

• Q: Can these pigments be used for recycled fiber coloring?

  A: Yes, these inorganic pigments are well-suited for coloring recycled pulp. They offer consistent color strength, helping to mask or override the residual color present in the mixed recycled fiber streams, producing a uniformly colored product.

Tailored Milling and Particle Control

We utilize specialized milling processes to achieve the necessary fineness and narrow particle size distribution for paper and fiber products. This ensures smooth application and prevents spots or defects in the finished sheet.

Process Optimization Support: Our technical team assists paper manufacturers by analyzing their specific slurry conditions (pH, hardness, retention aid type) to recommend the optimal pigment grade and dosage for maximum color efficiency and retention.

Dispersion and Opacity in Fiber Matrices

Color in paper is critically dependent on the pigment's state of dispersion and retention efficiency. We employ advanced color physics to measure the opacity and scattering coefficients of our paper-grade pigments within a cellulose medium. The small, highly dispersed particles maximize the exposed surface area, leading to high tinctorial strength and a uniform color appearance across the paper sheet, which is quantified by CIE Whiteness and Opacity tests.