Glass
Glass in ceramics refers both to the vitreous component that forms in ceramic glazes and to the direct use of glass fragments or powder to decorate the surface of the pieces. In glazes, glass is formed by melting during firing, creating a hard, shiny and resistant layer that not only beautifies the piece, but also waterproofs it and protects it against physical and chemical damage. This vitreous coating provides a uniform and aesthetically appealing finish. In addition to use in glazes, glass shards or crushed glass powder can be applied directly to the clay prior to firing for unique visual effects, such as glossy, speckled or textured surfaces, which add an extra dimension to the ceramic piece.
Glass in ceramics not only serves an aesthetic function, but also enhances the functional properties of the pieces. By acting as a vitrifying agent, glass increases the water resistance and durability of the pieces, making them more suitable for utilitarian applications such as tableware, vases and cookware.Interesting Fact
The use of glass in ceramics dates back to ancient civilizations such as the Egyptians, where vitreous glazing techniques were applied to small decorative objects and jewelry. Glass glazing techniques were perfected over the centuries, allowing a greater diversity of colors and finishes in ceramics, which contributed to the evolution of artistic and functional styles in different cultures around the world.Helpful Tip
If you plan to use crushed glass as decoration in your ceramic pieces, it is essential to make sure that the melting point of the glass is compatible with the firing temperature of the clay used. A glass with too low a melting point can overheat and melt uncontrollably, causing deformation or defects in the piece. On the other hand, a glass with too high a melting point may not melt properly, resulting in insufficient adhesion to the ceramic surface. Pre-test different types of glass and firing conditions to find the perfect combination that will allow you to achieve the desired decorative effect without compromising the integrity of the piece.
