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High thermal stability up to 1000 °C, enabling use in high-temperature ceramic and glass applications.
Excellent lightfastness and weather resistance, maintaining color integrity under prolonged UV exposure.
Chemically inert composition based on mixed metal oxides, ensuring compatibility with acidic and alkaline systems.
Low solubility in water and organic solvents, supporting long-term dispersion stability in coatings and plastics.
Non-toxic formulation compliant with global regulatory frameworks including REACH and RoHS.
Ceramic glazes and bodies for tableware, sanitaryware, and architectural tiles.
Coloration of borosilicate and soda-lime glass for packaging and decorative applications.
High-performance industrial coatings requiring thermal and chemical resistance.
Engineering plastics used in automotive and electronic components exposed to elevated temperatures.
Specialty inks for heat-transfer printing and ceramic decal transfers.
| Chemical Type | Mixed metal oxide (Zinc Iron Chromite-based) |
| Product Form | Fine powder |
| Appearance | Yellow to yellow-brown free-flowing powder |
| Primary Applications | Ceramics, glass, high-temperature coatings, engineering plastics |
| Key Features | Thermal stability, UV resistance, chemical inertness, low volatility |
| Benefits | Consistent batch-to-batch color, minimal sintering shrinkage, no heavy metal leaching |
| Regulatory Compliance | REACH registered, RoHS compliant, non-hazardous per GHS |
Q1: What is the primary chemical composition of HEUCODUR Yellow 255?
A: HEUCODUR Yellow 255 is a high-performance inorganic yellow pigment based on a stabilized mixed-metal oxide system, engineered for thermal and chemical robustness. Its exact phase composition is proprietary to Heubach, but it is formulated to deliver consistent chromatic performance without organic dye components or heavy metal restrictions associated with traditional cadmium or lead pigments.
Q2: Is this pigment suitable for use in polyolefin compounds processed at high temperatures?
A: Yes — HEUCODUR Yellow 255 is specifically developed for demanding thermoplastic applications, including polypropylene and polyethylene. It exhibits excellent thermal stability during extrusion and injection molding, retaining color strength and hue integrity even under prolonged exposure above 280 °C.
Q3: How does HEUCODUR Yellow 255 compare to organic yellow pigments in terms of weathering resistance?
A: As an inorganic pigment, HEUCODUR Yellow 255 offers significantly superior UV stability and long-term lightfastness compared to most organic yellows. It maintains color consistency under outdoor exposure and resists fading, chalking, and hue shift in applications such as automotive exterior parts and architectural profiles.
Q4: Can this pigment be used in food-contact plastics?
A: HEUCODUR Yellow 255 is designed for industrial and technical applications where regulatory compliance for food contact is not required. It is not certified for direct or indirect food-contact use under major global frameworks (e.g., FDA 21 CFR, EU Plastics Regulation), and users must verify suitability through their own regulatory assessment and testing.
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