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Exceptional lightfastness and weather resistance for long-term color stability in demanding outdoor applications.
High tinctorial strength with excellent dispersion characteristics in aqueous and solvent-based systems.
Non-toxic, sulfate-free formulation compliant with global regulatory standards including EN 71-3 and REACH.
Thermally stable up to 180°C, retaining vivid blue hue during polymer processing and baking operations.
Low oil absorption ensures efficient pigment loading and optimal rheology control in coatings and inks.
Architectural and industrial coatings requiring durable, non-fading blue tones.
Plastic coloration for PP, HDPE, ABS, and PVC in extrusion, injection molding, and blow molding.
High-performance printing inks for packaging, labels, and security printing.
Artists’ acrylics, gouache, and watercolor formulations where purity and alkali stability are critical.
Construction materials including colored concrete, stucco, and dry-mix mortars.
| Chemical Type | Sodium aluminosilicate sulfur complex (Ultramarine Blue) |
| Product Form | Fine, free-flowing powder |
| Appearance | Brilliant violet-blue granular powder |
| Primary Applications | Coatings, plastics, inks, artists’ colors, construction materials |
| Key Features | Alkali-stable, non-bleeding, low migration |
| Benefits | Consistent batch-to-batch color, easy incorporation, minimal dust generation |
| pH Stability Range | 5.0 – 10.5 |
| Storage Conditions | Store in cool, dry place; protect from moisture and direct sunlight |
Q1: What is the primary chemical composition of Nubiola V-8 Ultramarine Pigment?
A: Nubiola V-8 is a synthetic sodium aluminosilicate pigment with polysulfide chromophores, delivering intense blue coloration through its crystalline lattice structure. It contains no heavy metals such as lead, cadmium, or chromium, and is free from aromatic amines.
Q2: Is Nubiola V-8 suitable for use in food-contact plastics or packaging applications?
A: Nubiola V-8 is formulated to meet general requirements for pigments used in food-contact plastics under global regulatory frameworks, including FDA 21 CFR §178.3297 and EU Directive 2002/72/EC (as amended). Final compliance depends on the full formulation, processing conditions, and end-use application — users should conduct appropriate migration testing and consult regulatory experts for their specific case.
Q3: How does Nubiola V-8 perform under heat and UV exposure during polymer processing?
A: Nubiola V-8 offers good thermal stability up to typical polyolefin and PS processing temperatures (≤220 °C), and demonstrates moderate UV resistance in opaque systems. Prolonged exposure to strong UV radiation or high-temperature oxidative environments may lead to gradual fading; stabilization additives are recommended for demanding outdoor or long-term applications.
Q4: What dispersion methods are recommended for optimal color development in plastics?
A: For best results, pre-disperse Nubiola V-8 using high-shear compounding — e.g., twin-screw extrusion with adequate residence time and temperature control. Masterbatch dilution is widely adopted, and dosage typically ranges from 0.1% to 2% by weight depending on required shade depth and polymer matrix.
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