Terra sigillata
Terra sigillata is an extremely fine suspension of clay used in ceramics to create a smooth, satin and slightly shiny finish on the surface of a piece. This technique involves applying a thin layer of finely ground clay to the surface of a ceramic piece prior to firing, which provides a more refined and uniform finish without the need to apply a full glaze. Terra sigillata improves the impermeability and wear resistance of the pieces, while enhancing their aesthetic appearance with luster and a smooth texture. This technique has been used since ancient times, especially in Roman and Greek ceramics, and continues to be valued in contemporary ceramics.
The application of terra sigillata not only enhances the visual appearance of the piece, but also has a functional impact. By creating a thin, uniform layer of clay, surface porosity is reduced, which increases resistance to water and daily wear and tear. In addition, the smooth, glossy texture facilitates the adhesion of other decorative elements, such as additional engravings, paints or glazes, allowing for greater versatility in ceramic design.Interesting Fact
The term "terra sigillata" comes from Latin and means "sealed earth." It refers to a Roman pottery popular between the 1st century BC and 3rd century AD, known for its smooth, shiny, red or orange surface. These pieces often featured "seals" identifying the workshop or potter, and were highly valued for their quality and aesthetics. The terra sigillata technique allowed Roman potters to produce large quantities of pieces with uniform and refined finishes, facilitating their distribution and export throughout the Roman Empire and beyond.Helpful Tip
For best results when applying terra sigillata, it is crucial to work with pieces that are still in a leather-hard stage, i.e. firm enough to hold their shape but still damp to allow for an even application. Apply the terra sigillata using a soft brush or paintbrush, making sure to cover the entire surface evenly. After application, gently polish the surface with a soft cloth or burnishing tool to enhance the gloss and smoothness of the finish.
