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High thermal stability up to 800 °C, ensuring color integrity during high-temperature processing.
Excellent lightfastness and weather resistance, maintaining hue and opacity under prolonged UV exposure.
Non-toxic, heavy-metal-free formulation compliant with global regulatory standards including EN 71-3 and RoHS.
Superior tinting strength and dispersion efficiency in both aqueous and solvent-based systems.
Consistent particle size distribution for uniform color development and reduced settling in storage.
Architectural and industrial coatings requiring durable earth-tone pigmentation.
Ceramic glazes and clay-based bodies for kiln-fired tiles and sanitaryware.
Concrete and mortar colorants for precast and ready-mix applications.
Plastic masterbatches for outdoor furniture, construction profiles, and automotive non-critical components.
Artist-grade acrylic and oil paints where archival stability and pigment purity are essential.
| Chemical Type | Iron oxide-based inorganic pigment (Fe₂O₃·nH₂O + MnO₂) |
| Product Form | Free-flowing dry powder |
| Appearance | Uniform burnt umber granular powder |
| Primary Applications | Coatings, ceramics, concrete, plastics, artists’ colors |
| Key Features | Heat stable, lightfast, non-volatile, pH-stable (4–10) |
| Benefits | Low abrasivity, low oil absorption (~18 g/100g), excellent hiding power |
| Storage Conditions | Store in cool, dry, well-ventilated area; protect from moisture |
| Regulatory Compliance | REACH registered, FDA-compliant for incidental food contact (21 CFR 73.1200) |
Q1: What is the primary chemical composition of Cathay Hoover 510BU?
A: Cathay Hoover 510BU is a synthetic inorganic pigment based on iron oxide, specifically formulated to deliver a consistent burnt umber hue through controlled calcination of iron-rich precursors. It contains no organic dyes or heavy metal additives beyond trace impurities inherent to mineral-based pigments.
Q2: Is this pigment suitable for use in exterior architectural coatings?
A: Yes — 510BU exhibits excellent lightfastness, thermal stability, and resistance to weathering, making it well-suited for exterior applications such as masonry paints, stucco systems, and concrete colorants where long-term color retention under UV exposure and moisture cycling is required.
Q3: How does 510BU compare to natural umber pigments in terms of batch-to-batch consistency?
A: As a synthetic inorganic pigment, 510BU offers significantly higher reproducibility in shade, particle size distribution, and dispersion behavior compared to naturally mined umbers, which are subject to geological variability. This ensures reliable color matching across production runs in industrial coating and construction material formulations.
Q4: Can 510BU be used in water-based systems without special stabilization?
A: Yes — 510BU is readily dispersible in aqueous media and compatible with common anionic and non-ionic dispersants. While optimal performance depends on formulation pH and ionic strength, it does not require surface treatment for basic incorporation into latex paints, cementitious slurries, or waterborne primers.
Q5: What is the typical dosage range for achieving full opacity in architectural coatings?
A: Dosage varies depending on film thickness, substrate, and desired depth of tone, but 510BU typically achieves effective hiding power at concentrations ranging from 0.1% to 2% by weight in the final formulation — generally lower than required for many organic alternatives due to its high tinting strength and inherent opacity.
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