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High chroma, warm reddish-brown hue with excellent color consistency across batches.
Outstanding thermal stability up to 800 °C, suitable for high-temperature ceramic and refractory applications.
Low soluble salt content (< 0.1%), minimizing efflorescence risk in cementitious systems.
Optimized particle size distribution for enhanced dispersion and improved tinting strength in aqueous and solvent-based media.
Non-toxic, heavy metal-free formulation compliant with EN 71-3 and REACH Annex XVII requirements.
Architectural concrete and precast concrete products.
Ceramic glazes and engobes for stoneware and porcelain tiles.
Roofing granules and asphalt coatings.
Industrial coatings for infrastructure and marine environments.
Plastic masterbatches for outdoor applications requiring UV resistance.
| Chemical Type | Synthetic α-Fe₂O₃ (hematite) |
| Product Form | Free-flowing dry powder |
| Appearance | Uniform reddish-brown powder |
| Primary Applications | Concrete, ceramics, coatings, plastics |
| Key Features | Thermal stability, low solubles, high dispersibility |
| Benefits | Color retention under UV exposure, minimal bleeding in alkaline matrices |
| pH (10% aqueous slurry) | 6.5 – 7.5 |
| Volatile Matter (105 °C, 2 h) | ≤ 0.5% |
Q1: What is the primary chemical composition and crystal structure of Nubiola Y-7050?
A: Nubiola Y-7050 is a synthetic iron oxide pigment based predominantly on hematite (α-Fe₂O₃) with a well-controlled crystalline structure, optimized for consistent color strength, UV stability, and dispersibility in demanding industrial systems.
Q2: Is Nubiola Y-7050 suitable for use in exterior architectural coatings?
A: Yes — Y-7050 exhibits excellent resistance to UV radiation, weathering, and alkaline environments, making it widely specified in high-performance exterior masonry, stucco, and cementitious coatings where long-term color retention and minimal fading are critical.
Q3: How does Y-7050 perform in water-based versus solvent-based systems?
A: Y-7050 is engineered for broad compatibility — it achieves stable dispersion and minimal flocculation in both water-based emulsions and common organic solvent systems, though optimal performance requires appropriate wetting and dispersing agents matched to the specific vehicle chemistry.
Q4: Can Y-7050 be used in polymer coloration applications such as PVC or polyolefins?
A: Yes — Y-7050 is thermally stable up to typical polymer processing temperatures and is commonly used in rigid and semi-rigid PVC profiles, masterbatches, and construction-grade polyolefin compounds where heat stability and low volatility are required.
Q5: What are the key handling and safety considerations during formulation?
A: As with all fine particulate iron oxides, appropriate dust control measures (e.g., local exhaust ventilation, respirators for prolonged handling) are recommended during dry blending. The pigment is non-toxic, non-hazardous under normal conditions, and complies with general industrial hygiene guidelines for inert pigments.
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