Iriodin® 9121 Rutile Lustre Satin WR has an interference color of silverwhite. The mica-based pearl luster pigment refine coatings for interior and exterior applications.This product can be combined in a wide variety of ways with other colorings and a wide range of applications. It is supplied as a dry, free-flowing powder that is insoluble in water with a pH ranging from 6-9.