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High thermal stability up to 800 °C, suitable for high-temperature ceramic and enamel applications.
Excellent lightfastness and weather resistance, maintaining color integrity under prolonged UV exposure.
Non-toxic and heavy-metal-free formulation compliant with global regulatory standards (RoHS, REACH).
Superior dispersion performance in aqueous and solvent-based systems without requiring complex surface treatment.
Consistent particle size distribution ensuring uniform color strength and minimal batch-to-batch variation.
Ceramic glazes and underglaze decorations for tableware and architectural tiles.
High-performance architectural coatings requiring long-term color retention.
Industrial powder coatings for metal substrates exposed to outdoor environments.
Plastic coloration for automotive interior components where heat and light stability are critical.
Specialty inks for packaging films requiring FDA-compliant pigments.
| Chemical Type | Calcium-strontium chromate-based inorganic pigment |
| Product Form | Fine dry powder |
| Appearance | Brilliant red powder with slight orange undertone |
| Primary Applications | Ceramics, architectural coatings, powder coatings, plastics, specialty inks |
| Key Features | Heat stable, lightfast, non-toxic, heavy-metal-free |
| Particle Size (D50) | 0.8–1.2 µm |
| Bulk Density | 2.4–2.6 g/cm³ |
| pH (10% aqueous slurry) | 7.0–7.8 |
Q1: What type of inorganic pigment is CATHAYCOAT Red RA18B?
A: CATHAYCOAT Red RA18B is a high-performance, heat-stable iron oxide-based red pigment engineered for demanding industrial coating applications. It is not a cadmium or lead-based pigment and offers excellent chemical inertness and UV resistance.
Q2: Is this pigment suitable for high-temperature curing processes?
A: Yes — RA18B exhibits strong thermal stability and maintains its color integrity during typical industrial baking cycles, including those up to 200 °C. It is commonly selected for coil coatings, automotive refinishes, and powder coatings requiring robust heat resistance.
Q3: How does RA18B perform in acidic or alkaline environments?
A: As an iron oxide derivative, RA18B demonstrates good resistance to mild to moderate acidic and alkaline conditions encountered in architectural and industrial coating systems. However, prolonged exposure to highly aggressive media may affect dispersion stability and should be evaluated in the final formulation.
Q4: Can RA18B be used in waterborne coating systems?
A: Yes — RA18B is compatible with both solvent-borne and waterborne systems when properly dispersed using appropriate surfactants or dispersing agents. Optimal performance requires formulation-specific dispersion optimization to ensure stability and color development.
Q5: What is the recommended dosage range for achieving optimal color strength and opacity?
A: Dosage depends on the base system, desired shade intensity, and film thickness, but RA18B is typically used at low concentrations due to its high tinting strength and hiding power — generally ranging from 0.1% to 2% by weight in the final coating formulation.
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