Product Overview
Strontium aluminate doped with europium and dysprosium is the dominant modern photoluminescent pigment, having displaced zinc sulfide because its afterglow is roughly an order of magnitude brighter and far longer — easily visible for 10 hours or more after excitation in a fully dark-adapted environment. The yellow-green emission (peaking near 520 nm, where human dark-adapted vision is most sensitive) charges quickly under daylight, fluorescent or UV sources and fades over hours rather than minutes. Grades are differentiated by particle size distribution — finer 15–45 µm grades suit inks and thin coatings, coarser 75–150 µm grades give maximum brightness in thick-cast resin and signs. Because the phosphor is moisture-sensitive over long exposure, water-based systems should use coated (encapsulated) grades. Manufacturers listed here supply industrial 25 kg packaging, particle size certificates and afterglow decay curves per DIN 67510 test methods for safety-signage specifications.
OEM & Customization Capabilities
- Grade Selection – particle size and brightness grade matched to ink, coating or casting thickness.
- Decay Data – luminance-vs-time curves (DIN 67510 method) supplied per lot for signage compliance.
- Formulation Support – mixing guidance for paints, masterbatch, silicone and epoxy systems.
Industry Applications
- Photoluminescent Pigments
- Glow-in-the-Dark Materials