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High thermal stability suitable for processing temperatures up to 800 °C.
Excellent lightfastness and weather resistance, maintaining color integrity under UV exposure.
Non-toxic formulation compliant with major global regulatory standards including EN 71-3 and RoHS.
Low oil absorption for efficient dispersion in inorganic binder systems.
Chemically inert—resistant to acids, alkalis, and solvents commonly used in industrial coatings.
Ceramic glazes and decorative tiles requiring high-firing stability.
Architectural concrete and precast façade elements.
High-temperature resistant coatings for industrial furnaces and exhaust components.
Fireproofing materials and intumescent formulations.
Colored glass batches for signage and architectural glazing.
| Chemical Type | Mixed metal oxide (Fe–Cr–Al spinel-based) |
| Product Form | Fine free-flowing powder |
| Appearance | Deep brick-red to maroon powder |
| Primary Applications | Ceramics, refractories, architectural concrete, high-temp coatings |
| Key Features | Heat stable, UV stable, chemically inert, non-volatile |
| Benefits | Color consistency after firing, low migration risk, long-term outdoor durability |
| Density (g/cm³) | 4.2–4.5 |
| Particle Size (D50, μm) | 1.8–2.4 |
Q1: What is the primary chemical composition of Cathay CATHAYCOAT Red RS11-1?
A: Cathay CATHAYCOAT Red RS11-1 is an iron oxide-based inorganic pigment, formulated to deliver high thermal stability and consistent red hue performance in demanding industrial coating systems.
Q2: Is this pigment suitable for high-temperature curing applications?
A: Yes — RS11-1 exhibits excellent thermal stability and retains its color integrity during standard industrial baking cycles, including those exceeding 180°C, making it well-suited for coil coatings, automotive primers, and powder coating formulations.
Q3: How does RS11-1 perform in UV-exposed outdoor applications?
A: As a crystalline inorganic oxide pigment, RS11-1 offers inherent UV resistance and long-term weathering stability, supporting durable color retention in exterior architectural coatings and industrial maintenance paints without significant fading or chalking.
Q4: Can RS11-1 be used in waterborne coating systems?
A: Yes — RS11-1 is compatible with both solvent-borne and waterborne industrial coating systems. Its surface treatment ensures good dispersibility and stability across a range of pH and ionic strength conditions typical in aqueous formulations.
Q5: What is the typical dosage range for optimal color development?
A: Dosage depends on formulation requirements and desired opacity, but RS11-1 is typically used at low concentrations — generally ranging from 0.1% to 2% by weight — due to its high tinting strength and efficient light absorption characteristics.
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