| 摘要 |
Multilayer pearlescent pigments with a silver interference color, based on platelet-shaped transparent substrates with an optically active coating, where the optically active coating includes at least a) a high-index layer A having a refractive index n≧1.8 b) a low-index layer B having a refractive index n<1.8 c) a high-index layer C having a refractive index n≧1.8 and also d) optionally an outer protective layer D. The multilayer pearlescent pigments have the indices D10, D50, D90 from the cumulative frequency distribution of the volume-averaged size distribution function, with a spanΔD of 0.7-1.4, the spanΔD being calculated in accordance with the formulaΔD=(D90−D10)/D50. The invention further relates to a method for producing these multilayer pearlescent pigments, and also to their use. |
