Zinc is used in ceramics mainly as a flux, helping to reduce the melting point of glazes and improving their adhesion to ceramic pieces. It is also used to modify colors and textures in glazes and engobes, softening and dulling colors, producing more subtle and refined effects in finished pieces.
When mixed with other elements, such as lead or copper, zinc can contribute to the production of iridescent and metallic glazes, creating visual effects that mimic surfaces such as aged copper or oxidized metals.
Zinc also improves the mechanical properties of ceramic pieces, increasing their resistance to deformation during firing and their ability to resist cracking. This makes it a very versatile material in ceramics, useful both for aesthetic effects and for improving the durability of the pieces.
Interesting Fact
Zinc was instrumental in the development of opalescent ceramic glazes during the 19th century, especially in Europe. This material allowed ceramists to experiment with translucent, milky finishes that captured light in a unique way, achieving effects similar to frosted glass.
Helpful Tip
If you want to lower the melting point of your glazes and create softer colors, zinc oxide is an excellent choice. Be sure to adjust the proportions according to the type of clay and firing temperatures to prevent the glaze from becoming too opaque or brittle.
