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High thermal stability up to 1000 °C, suitable for high-temperature ceramic and refractory applications.
Excellent lightfastness and weather resistance, ensuring long-term color retention in outdoor exposure.
Non-toxic, heavy-metal-free formulation compliant with global regulatory standards including EN 71-3 and RoHS.
Strong tinting strength and uniform particle dispersion for consistent batch-to-batch color performance.
Chemically inert and acid/alkali resistant, enabling compatibility with diverse binder systems.
Ceramic glazes and underglaze decorations for tableware and architectural tiles.
High-performance coatings for industrial steel structures and exhaust systems.
Coloration of refractory bricks, castables, and fireproofing mortars.
Pigmentation of construction materials including concrete pavers, terrazzo, and precast elements.
Specialty inks for heat-resistant labeling on metal and ceramic substrates.
| Chemical Type | Mixed Metal Oxide (Fe–Cr–Mn–Ni spinel-based) |
| Product Form | Fine dry powder |
| Appearance | Uniform reddish-brown free-flowing powder |
| Primary Applications | Ceramics, refractories, high-temp coatings, construction materials |
| Key Features | Thermal stability, lightfastness, chemical inertness, non-toxicity |
| Benefits | Color consistency, low migration, minimal binder interference, regulatory compliance |
| pH (5% aqueous suspension) | 6.5 – 8.0 |
| Moisture Content (wt%, max) | 0.5% |
Q1: What is the primary chemical composition of Cathay CATHAYCOAT Brown BRS81?
A: Cathay CATHAYCOAT Brown BRS81 is an iron-based inorganic pigment, primarily composed of complex mixed metal oxides incorporating iron and other transition metals to achieve its stable brown hue and high thermal stability.
Q2: Is this pigment suitable for high-temperature coating applications, such as coil coatings or ceramic glazes?
A: Yes — BRS81 exhibits excellent thermal stability and resistance to degradation at elevated processing temperatures, making it well-suited for demanding applications including coil coatings, industrial baked enamels, and certain low-fire ceramic systems.
Q3: How does BRS81 perform in UV-exposed outdoor applications?
A: As a fully inorganic oxide pigment, BRS81 offers outstanding lightfastness and UV resistance, with minimal risk of fading or chalking under prolonged outdoor exposure — ideal for architectural coatings and exterior industrial finishes.
Q4: Can BRS81 be used in water-based coating systems?
A: Yes — BRS81 is compatible with both water-based and solvent-based systems. Its surface treatment ensures good dispersion stability and rheological compatibility across common acrylic, epoxy, and polyurethane formulations.
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