Ulexite, also known as "television stone", is a borate-rich mineral used mainly in ceramics as a flux in glazes. Its main function is to lower the melting point of glazes, which allows glossy, well vitrified finishes to be obtained without the need for firing at excessively high temperatures. Ulexite also improves the adhesion of the glazes to the pieces and gives them greater durability.
In addition to being an excellent flux, ulexite can contribute to the creation of unique visual effects on the glaze surface, creating interesting patterns or smooth textures, depending on kiln conditions and the concentration of ulexite in the mixture.
Interesting Fact
Ulexite is known as the "television stone" due to its ability to transmit images through its natural fibers, although this property does not directly affect its use in ceramics.
Helpful Tip
If you are looking to improve the melting of your glazes without increasing the firing temperature, ulexite is an excellent choice. However, be sure to test before use in large quantities, as it can affect the transparency and texture of the glaze.
