PV 15 – ultramarine violet PV 15 – ultramarine violet Used successfully in watercolors. Manufacturer/ product code: Kremer / 42605Chemical Description: sodium aluminum sulfosilicateColor: violetColor Index: PV 15Date: from 1878 Reflectance Spectroscopy (350-950 nm) Reflectance Spectroscopy (200-1250 nm) Reflectance Spectroscopy (950-1700 nm) XRF Spectroscopy Raman Spectroscopy (532 nm) Raman Spectroscopy (785 nm) Raman Spectroscopy (830 nm) FTIR Spectroscopy (non-invasive )