Pearl Lustre Pigments are made from mica flakes, finely coated with titanium and/or iron oxide. The thickness and combination of coatings produces refraction of light to give an appearance similar to oil film on water. They can be mixed with any medium, are non-toxic and totally lightfast. They are impervious to acids, alkalis, water and temperatures up to 800°C and are best used over dark base-coat colours. They give a wide range of effects (from soft satin to sparkiling brilliance) over other colours.