Glaze
Glaze is a vitreous coating that melts onto the surface of a piece of clay during firing, providing color, luster and protection. Composed primarily of a mixture of silica, fluxes (such as sodium carbonate or potash) and alumina, glaze reacts chemically at high temperatures to form a durable surface that beautifies and protects the ceramic.
The glaze not only adds color and texture, but also makes the pieces waterproof, protects the ceramic from abrasion, stains and corrosion, increasing the durability and functionality of the pieces. In artistic ceramics, glazes allow the creation of complex visual effects such as crackle, metallic glazes and crystallized glazes, enriching the expressiveness and aesthetic value of the works.
There are different types of glazes according to their composition and the application techniques used, such as transparent, opaque, metallic and crackle glazes. Glazes can be applied by various techniques, such as dipping, brushing, spraying or spraying, allowing a wide range of finishes and decorative effects. The choice of glaze and application technique depends on the type of piece, the desired effect and firing conditions.Interesting Fact
In ancient Egypt, potters were already using glazes based on copper and other metals to protect and embellish their pieces. These glazes not only improved the appearance of the ceramics, but also increased their functionality by making them waterproof and more resistant to wear. This technique has been perfected over the centuries, allowing for a greater diversity of colors and finishes in contemporary ceramics.Helpful Tip
Control the viscosity of the glaze when applying it, especially in techniques such as dipping or spraying. A glaze that is too thick may crack during firing, while one that is too thin may not provide adequate coverage. Test small samples to determine the optimum viscosity and avoid defects in the final piece.
