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Highly stable iron oxide-based pigment with excellent lightfastness and weather resistance.
Consistent natural earth tone—authentic raw sienna hue without synthetic color drift.
Low oil absorption for efficient dispersion in water- and solvent-based systems.
Non-toxic, heavy-metal-free formulation compliant with global environmental and safety standards.
Thermally stable up to 800°C, suitable for high-temperature coating and ceramic applications.
Architectural coatings and exterior wall paints requiring durable, UV-resistant earth tones.
Ceramic glazes and clay body coloring for traditional and industrial pottery production.
Concrete and cementitious products including precast elements and terrazzo flooring.
Plastic masterbatches for construction profiles, garden furniture, and outdoor consumer goods.
Artist-grade acrylics, oils, and watercolor pigments demanding archival stability and non-fugitive performance.
| Chemical Type | Natural iron oxide (Fe₂O₃·H₂O) with controlled hydration |
| Product Form | Fine dry powder |
| Appearance | Free-flowing, reddish-brown granular powder |
| Primary Applications | Coatings, ceramics, concrete, plastics, artists’ materials |
| Key Features | Lightfastness ≥8 (ISO 105-B02), pH stability 4–10 |
| Benefits | Low dust generation, easy wetting, minimal settling in dispersions |
| Storage Conditions | Store in cool, dry, well-ventilated area away from moisture and direct sunlight |
| Regulatory Compliance | REACH registered; RoHS and EN71-3 compliant |
Q1: What is the primary chemical composition of Cathay Hoover 206RS Raw Sienna?
A: Cathay Hoover 206RS is an iron oxide-based inorganic pigment, primarily composed of hydrated iron oxide (Fe₂O₃·nH₂O), consistent with the natural earth pigment profile of raw sienna. Its color and performance derive from its specific crystalline structure and particle morphology, not from organic dyes or synthetic colorants.
Q2: Is this pigment suitable for use in exterior architectural coatings?
A: Yes — Cathay Hoover 206RS exhibits excellent lightfastness, thermal stability, and weather resistance due to its inorganic nature, making it well-suited for long-term outdoor applications such as masonry paints, stucco, and concrete stains where UV exposure and alkaline environments are common.
Q3: How does 206RS differ from burnt sienna or synthetic iron oxides?
A: Unlike burnt sienna, which is calcined to yield a redder tone, 206RS retains the natural yellowish-brown hue characteristic of raw sienna. Compared to fully synthetic iron oxides, it offers a more nuanced, earthy chroma and subtle undertones preferred in heritage restoration and premium decorative finishes.
Q4: What dispersion methods are recommended for optimal performance in water-based systems?
A: For water-based coatings and construction mortars, pre-wetting followed by high-shear mixing or bead milling is recommended. The pigment responds well to conventional anionic or nonionic dispersants commonly used with iron oxides, though compatibility testing with specific resin and additive packages is advised to ensure uniformity and stability.
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E-mail: wangxingqiang@ericwchem.com
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