Coatings & Finishes
Inorganic Ultramarine Pigments for Architectural and Industrial Coatings
Published:
2026-03-25
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Reading time:
5 min read
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By RS Pigments Applications Engineering
Alkali-resistant colorants for masonry, stucco, coil coatings, and decorative artist colors requiring permanent exterior lightfastness.
Exterior coatings exposed to cement, plaster, and masonry require pigments that resist alkaline saponification. Synthetic Ultramarine Blue and Violet have an alkali resistance rating of 5/5, ensuring zero color fade on exterior buildings.
Their high lightfastness (Blue Wool Scale 7 to 8) provides decades of weather stability without photochemical degradation under intense solar ultraviolet radiation.
Key Technical Takeaways
- Ultramarine Blue is chemically non-nucleating, eliminating shrinkage and warping in HDPE and PP injection moldings.
- Thermal stability up to 350°C in specialized heat-resistant grades and NANOX compounding platforms.
- Total resistance to alkaline environments (5/5 rating), ideal for masonry coatings, concrete, and laundry powders.
Need Technical Testing Samples for Your Lab?
RS Pigments supplies 1kg and 5kg trial sample packs with certified CoA, complete particle size distribution, and FPV analysis.