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High thermal stability up to 250°C, maintaining color integrity during processing.
Excellent lightfastness and UV resistance for long-term outdoor performance.
Non-toxic, sulfate-free formulation compliant with global regulatory standards (REACH, RoHS).
Superior dispersibility in aqueous and solvent-based systems without grinding aids.
Consistent particle size distribution ensuring uniform tinting strength and batch-to-batch reproducibility.
Architectural coatings and exterior wall paints requiring fade-resistant blue/violet hues.
Plastic coloration for polyolefins, PVC, and engineering resins in automotive interior components.
Inks for packaging gravure and flexographic printing on paper and film substrates.
Artist-grade acrylics, gouache, and watercolor formulations demanding high purity and clarity.
Building materials including concrete pavers, terrazzo, and precast architectural elements.
| Chemical Type | Sodium aluminum silicate sulfide (synthetic ultramarine) |
| Product Form | Fine dry powder |
| Appearance | Brilliant blue to violet-blue free-flowing powder |
| Primary Applications | Coatings, plastics, inks, artists’ colors, construction materials |
| Key Features | Alkali-stable, non-bleeding, low oil absorption (~45 g/100g) |
| Benefits | Enhanced weatherability, eco-friendly alternative to cobalt-based blues |
| pH Range (10% aqueous suspension) | 8.5–9.5 |
| Heavy Metals Content | Compliant with EN 71-3 and ASTM F963 (≤10 ppm Pb, Cd, Cr, Hg) |
Q1: What is the primary function of Holliday AR Ultramarine Pigment in industrial coatings?
A: Holliday AR Ultramarine Pigment serves primarily as a high-performance blue colorant and optical brightener in solvent-based and high-solids industrial coatings. Its excellent lightfastness and thermal stability enable consistent color performance during curing and long-term service exposure.
Q2: Is Holliday AR Ultramarine Pigment compatible with acidic resin systems?
A: No — ultramarine pigments are inherently sensitive to acidic environments. Holliday AR is formulated for optimal performance in neutral to mildly alkaline systems. Use in strongly acidic binders (e.g., certain epoxy esters or low-pH acrylics) may cause color fading or decomposition; compatibility testing under actual formulation conditions is strongly recommended.
Q3: How does Holliday AR differ from standard ultramarine pigments in terms of dispersion and rheology?
A: Holliday AR features a surface-treated particle morphology designed to enhance wetting and reduce agglomeration in organic media. This results in easier dispersion with lower energy input and improved suspension stability, particularly in medium-to-high-viscosity coating systems without significantly altering flow behavior.
Q4: Can Holliday AR Ultramarine Pigment be used in food-contact coatings?
A: Holliday AR is not intended or certified for direct food-contact applications. While ultramarines are permitted in certain food packaging inks under specific regulatory frameworks, this grade is engineered for industrial maintenance and protective coatings — not food-safe formulations. Customers requiring food-contact compliance must consult regulatory experts and select appropriately certified alternatives.
Q5: What is the typical dosage range for achieving full opacity in alkyd-based primers?
A: Dosage depends on desired shade intensity and film thickness, but Holliday AR is generally effective at low concentrations — typically ranging from 0.1% to 2% by weight in alkyd primer systems. For optimal hiding and color uniformity, gradual addition with post-addition dispersion is recommended over high-shear pre-mixing.
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