Black Pigments for High Temperature Processing

Experts in Thermal Pigment Stability

Deqing Demi Pigment Technology Co., Ltd. specializes in heat-resistant color solutions for extreme industrial environments. We understand that thermal stability is non-negotiable for high-speed extrusion and industrial baking. Our high-temperature blacks are the industry standard for manufacturers who require color permanence under heat stress. We provide robust mineral blacks that act as reliable colorants for everything from engine components to high-heat polymer compounds.

High-Temp Application Sectors

• Silicone Gaskets: Heat-stable black for automotive and aerospace seals.
• Cookware Coatings: Non-toxic black for high-heat non-stick exteriors.
• Technical Plastics: Safe coloring for PPA, PPS, and other high-melt polymers.
• Industrial Enamels: Black finishes for boilers, exhausts, and heat exchangers.

High-Temp Black Specs

Performance Characteristics

• Chemical Oxidation Barrier: Resists the transition from Fe3​O4​ to Fe2​O3​.
• Low Volatility: Zero outgassing during high-temperature plastic molding.
• Deep Jetness: Maintains a professional "piano black" finish after firing.
• Excellent Dispersion: Milled for rapid wetting in high-viscosity resins.

• Q: Why does standard black turn red in my process?

  A: Basic magnetite oxidizes at 180∘C. You need our Manganese-doped series to stay black above 200∘C.

• Q: Is it electrically conductive?

  A: Our high-temp mineral blacks are generally non-conductive, making them safer for electronic housings than carbon black.

Bespoke Thermal Engineering

We offer "Phase-Stable" testing, where we heat samples of your material with our pigment to your specific processing temperature to verify hue stability.

Custom Sizing: We provide ultra-micronized blacks for thin-film coatings that require a glass-smooth surface even after high-temperature curing.

The Science of Spinel Stability

In high-temperature blacks, we focus on the "Lattice Energy" of the spinel structure. By incorporating Manganese (Mn) or Zinc (Zn) into the iron oxide crystal, we raise the energy barrier required for oxidation. We use TGA (Thermogravimetric Analysis) to ensure the pigment's weight remains constant up to 800∘C. This ensures that the "L*" value (lightness) remains consistently low, providing the deep black aesthetics required for premium industrial goods.