Titanium dioxide. Iridescent pigments undergo surface treatment with mica ; their level of iridescence varies according to the mica content. As a result of reflections and light interference, they may take on very different colours. Extremely lightfast, excellent covering power, non-toxic. Used for a wide range of applications, including cosmetics. Suitable in all binders, including oils, vinyl paints, resins, etc… Avoid grinding iridescent pigments ; grinding may destroy their “mother-of-pearl” effect.