A very cost-effective fluxing agent which helps in cutting energy costs and CO2 (carbon dioxide) emissions is the Luzenac talc. It is used for making highly active fluxing agents and brings magnesium oxide to the ceramic flux when used with feldspar. Use of this combination lowers fusion temperature and speeds up the vitrification process. It also improves composition viscosity, increases surface tension and stabilizes thermal expansion, which is very important for large format tiles.
All this creates tremendous savings by reducing firing cycles and decreased firing temperatures and leading to additional benefits in form of lower maintenance costs. To take an example, for creating stoneware tiles, energy savings can be made by lowering the temperature by 25˚ to 35˚ thus saving up to 90 kilocalories per kg of product.