Zircopax, ZrSiO4 is a brand name for various grades of zirconium silicate opacifier. The grade that Continental Clay offers is Zircopax-Plus and it is comprised of 94.0% ZrSiO4 on average.
- Zircopax Plus is white in appearance and white to grey-white as an opacifier after firing.
- As a sole opacifier zircopax is added to glaze and glass formulations in amounts that range from 3% to 12%.
- If background opacity is the objective and other colorants are to be included, the use of Superpax rather than Zircopax is often recommended as an overall cost saving measure.