Update 10/10/18: This product will be discontinued once its sold out.
Wax coated Sericite Mica.
SMAX is Sericite Mica coated with synthetic paraffin wax. The advantage of this surface treatment is that the mica has a nice silky feeling going on and it also stays on longer! (improved slip and adhesion). By using a synthetic rather than a natural wax, the melting point is higher, making for a product which is more stable under all conditions.
The wax surface coating also gives it a better "pressability" making it a superior choice for pressed powder cosmetics.