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Exceptional lightfastness and weather resistance for long-term color stability.
High tinctorial strength with intense, clean blue-violet hue.
Excellent heat stability up to 180 °C in polymer and coating systems.
Non-toxic, sulfate-free formulation compliant with global regulatory standards.
Optimized particle size distribution for superior dispersion and gloss retention.
Architectural and industrial coatings requiring durable blue pigmentation.
Plastic coloration for polyolefins, ABS, and PVC applications.
High-performance inks for packaging and decorative printing.
Construction materials including colored concrete, stucco, and tile grouts.
Artist-grade acrylics and water-based decorative paints.
| Chemical Type | Sodium aluminosilicate sulfur complex |
| Product Form | Fine dry powder |
| Appearance | Free-flowing violet-blue powder |
| Primary Applications | Coatings, plastics, inks, construction materials |
| Key Features | Lightfast, heat-stable, non-bleeding, low migration |
| Benefits | Consistent batch-to-batch color, easy dispersion, low dust generation |
| Regulatory Compliance | REACH registered; compliant with FDA 21 CFR §73.1627 (for indirect food contact) |
| pH (10% aqueous suspension) | 9.0–10.5 |
Q1: What is the primary chemical composition and structure of Nubiola V-5 Ultramarine Pigment?
A: Nubiola V-5 is a synthetic sodium aluminosilicate pigment with polysulfide chromophores embedded in its crystalline lattice. Its intense blue hue arises from the sulfur-based radical anions stabilized within the sodalite cage structure — a hallmark of high-quality ultramarine pigments.
Q2: Is Nubiola V-5 suitable for use in acidic media or low-pH formulations?
A: No — like all traditional ultramarine pigments, V-5 is sensitive to acidic conditions and may undergo color degradation or loss of intensity below pH ~5.5. It is best suited for neutral to alkaline systems, such as aqueous coatings, cementitious materials, and certain polymer masterbatches where pH stability is maintained.
Q3: How does Nubiola V-5 perform under UV exposure and outdoor weathering?
A: V-5 exhibits good lightfastness in protected applications but is not recommended for prolonged direct UV exposure without stabilization. Its performance improves significantly when incorporated into UV-stabilized binders or used indoors — typical in decorative plasters, artist’s colors, and interior architectural coatings.
Q4: Can Nubiola V-5 be dispersed in water-based systems without special additives?
A: While inherently hydrophilic due to its ionic surface, optimal dispersion in water-based systems typically requires mild mechanical agitation and may benefit from non-ionic dispersants or pH adjustment to ensure colloidal stability and prevent agglomeration.
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E-mail: wangxingqiang@ericwchem.com
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