Titanium Dioxide – TiO2 (m.p. 3360o F/1850o C) is produced from Ilmenite (FeTiO4) and purifying to TiO2. It is used in a glaze as an opacifier, and will produce cream colors versus the white color of Tin Oxide. It promotes acid resistance and texture to a glaze (such as the mottling effect similar to Rutile, but without the Iron contamination.) Light Ceramic Rutile can be substituted if the color from the Iron content does not matter.