Construction Grade Inorganic Pigments

Introduction to Coloring Construction Materials

As a dedicated manufacturer of inorganic iron oxide pigments, Deqing Demi Pigment Technology Co., Ltd. provides coloring solutions tailored specifically for the construction industry. Our focus is on delivering materials that not only provide vibrant and lasting color but also maintain the structural integrity and performance of the finished product. We produce a range of standard and specialized composite iron oxide pigments designed to meet the rigorous demands of civil and architectural projects, ensuring color consistency batch-to-batch.

Major Usage Sectors

• Concrete Products: Paving stones, blocks, roof tiles, and precast elements.
• Mortars & Stucco: Coloring for jointing mortar, renders, and exterior facades.
• Fiber Cement: Integral coloring of fiber cement boards and sheets.
• Ready-Mix Concrete: On-site coloring for large structural and decorative concrete pours.

Material Performance Data (Standard Grades)

Key Functional Benefits

• Alkali Resistance: Maintains shade stability when mixed directly into high-pH cementitious systems.
• High Opacity: Effective masking of the grey or white base color of cement, reducing required dosage.
• UV Stability: Pigment structure resists degradation when exposed to direct sunlight, preventing color fade over decades.
• Thermal Stability: Suitable for processes involving heat curing (e.g., steam curing of blocks).

• Q: Can these pigments be used in white cement?

  A: Yes, the strong tinting power of our construction-grade pigments allows them to achieve deep, rich colors even when used in white cement bases. Due to the lower masking required, the dosage may need adjustment compared to grey cement.

• Q: What affects the final color in concrete?

  A: The final color is influenced by the water-to-cement ratio, the curing process (steam vs. air), the color of the cement and aggregate used, and the pigment dosage. Consistent mixing and curing practices are essential for reproducible results.

Manufacturing Process and Dedicated Support

We utilize advanced composite preparation and grinding technologies to ensure narrow particle size distribution, which directly translates to improved color strength and consistency in construction applications. Our production line is designed for high-volume output, supporting large-scale projects globally.

Custom Color Matching: We offer a tailored service to match specific architectural or regional color standards. Our technical team works with client samples to develop custom blends that meet unique hue and performance requirements, including formulations optimized for specific concrete admixtures.

Alkaline Compatibility & Color Integrity

The primary challenge in construction coloring is the high alkalinity of cement systems (pH typically 12-13). Our inorganic pigments are engineered to be chemically inert under these conditions, preventing pigment dissolution or reaction which would lead to efflorescence or color shift. We use CIE data to verify that the color coordinates (L*, a*, b*) remain stable after being subjected to accelerated alkaline exposure tests, ensuring the pigment maintains its intended hue over the concrete's cure time.