In addition to its outstanding properties, lithopone has excellent stability, weather resistance and chemical inertness. This makes it suitable for a wide range of applications, even under harsh environmental conditions. You can rely on lithopone to stand the test of time, maintaining its luster and performance for years to come.
Anyway, it doesn't matter if it reflects or absorbs, Titanium Dioxide is a pretty awesome sunscreen agent for two main reasons: it gives a nice broad spectrum coverage and it's highly stable. Its protection is very good between 290 - 350 nm (UVB and UVA II range), and less good at 350-400 nm (UVA I) range. Regular sized Titanium Dioxide also has a great safety profile, it's non-irritating and is pretty much free from any health concerns (like estrogenic effect worries with some chemical filters).