Cryolite is a mineral composed primarily of sodium fluoride and aluminum. In ceramics, it is mainly used as a flux due to its ability to significantly lower the melting point of glazes, which facilitates the melting of ingredients and the creation of uniform and consistent coatings at lower temperatures. This effect is especially useful in low-temperature glazes, where efficient vitrification is sought without the need for high firing temperatures.
In addition to its properties as a flux, cryolite is appreciated for its ability to modify the visual characteristics of glazes. Its addition in glaze formulation can improve transparency, providing a glassy, glossy finish. However, it is also highly valued for its ability to produce opaque effects in some glazes.
Interesting Fact
Cryolite was used in large quantities in the aluminum industry before being replaced by other materials.
Helpful Tip
Cryolite can be sensitive to kiln conditions, so controlling the firing time and temperature is key to obtaining the best results.
