Specifically for tiles, we have kaolins with different cuts classified by their grain sizes are recommended for different uses:
1) R45µ = 4% and 34% of Al2O3: With brightness and stability at high temperatures, are recommended for spray-dried bodies and tiles.
2) R45µ = 2-3% and 36% Al2O3: by whiteness and / or plasticity are given in the introduction of slips and glazes compositions matte finish.
3) R25µ = 0.5% and 37% Al2O3: kaolin extremely thin and free of impurities suspending high power suitable for incorporation in glossy enamels, which results in a surface quality that requires this type of product.
Floor and Wall tiles: