Dolomite is a mineral composed mainly of calcium and magnesium carbonate, which is used especially in the manufacture of glazes, as it is an important source of calcium and magnesium, two essential elements in the formulation of ceramic glazes. As a flux, dolomite helps to reduce the melting temperature of glazes, facilitating their firing at lower temperatures. This not only improves the efficiency of the firing process, but also allows for more precise control of glaze texture and appearance.
Dolomite is especially useful in the creation of matte or semi-matte glazes, as it contributes to the opacity and matte finish of the pieces. In addition to its aesthetic properties, dolomite improves resistance to thermal changes, making it a valuable material for utilitarian ceramics, such as tableware and cookware. This characteristic is crucial in pieces that must withstand rapid temperature changes, such as those used in kilns or in contact with hot liquids.
Interesting Fact
In addition to its use in ceramics, dolomite is also used in agriculture to neutralize acidic soils and as a mineral supplement in animal feed.
Helpful Tip
If you are looking for a matte or semi-matte glaze with a smooth texture, use dolomite in your glaze mix. Be careful with the amount, as too much dolomite can cause the glaze to become too opaque or crackle during firing.
