Black Pigments Powder for Construction Materials

Integrated Solutions for Black Architectural Materials

Deqing Demi Pigment Technology Co., Ltd. provides the construction industry with black powders that offer superior tinting power and stability. We understand that achieving a "true black" in cementitious or mineral systems is a challenge due to the natural lightness of the binders. Our production process ensures that our black pigments are free from impurities that could cause efflorescence. We are a trusted partner for manufacturers of high-end black concrete pavers, tiles, and specialty mortars.

Black Construction Application Fields

• Concrete Pavers: Creating modern, charcoal and slate-effect driveways.
• Architectural Concrete: Deep black structural walls and columns.
• Roofing Materials: Black pigmentation for concrete and fiber-cement shingles.
• Jointing Mortars: Dark grey to black mortar for contrasting brickwork.

Black Construction Pigment Specs

Functional Attributes for Black Materials

• Maximum Hiding Power: Effectively masks the grey of standard Portland cement.
• UV Permanence: Unlike organic black dyes, these inorganic oxides will not fade to blue or brown.
• Oxidation Resistance: Processed to prevent the transition of black oxide to red oxide during storage.
• Non-Reactive: Does not interfere with air-entraining agents or other concrete chemicals.

• Q: Is there a risk of the black color "bleeding" when it rains?

  A: Our iron oxide blacks are insoluble minerals that become part of the concrete matrix, ensuring no bleeding or leaching occurs over time.

• Q: How much black pigment should I use for a "charcoal" look?

  A: For charcoal, a dosage of 1-2% of the cement weight is usually sufficient; for a deep black, 5-7% is recommended.

Precision Black Formulation

We offer multiple grades of black, including bluish-black and brownish-black variants, allowing for precise matching with natural stone such as slate or basalt.

Stability Treatment: Our black pigments undergo a specialized surface treatment to prevent oxidation, ensuring that the powder maintains its deep black hue even when stored in humid conditions or used in high-temperature curing processes.

The Science of Blackness (Jetness)

Black color science is measured primarily by the "L*" value (lightness) and the "Mc" (My value for jetness). In construction, the goal is to achieve the lowest possible L* value. We use spectrophotometric analysis to ensure that our black pigments absorb across the entire visible spectrum (400-700nm) without peaks that would indicate a color bias. By controlling the particle size distribution, we minimize light scattering, ensuring that the finished construction material appears deep, dark, and uniform.