Single firing
Single firing is a ceramic process that integrates the stages of bisque firing and glazing in a single firing, reducing time, energy consumption and production costs. In this method, the glaze is applied directly on the raw piece, without having been previously fired. As the kiln temperature rises, the piece changes from a moist, brittle clay to a hardened, vitrified material, while the glaze simultaneously melts, forming a vitreous layer on the surface.
This technique requires more precise control of the moisture in the piece prior to firing, as well as an appropriate glaze formulation to resist volume change, outgassing and moisture removal during thermal rise. Although it may present more technical challenges than the traditional double firing method, single firing is attractive in industrial or semi-industrial contexts that seek to optimize resources. Its use is common in the production of utilitarian earthenware, as it simplifies the production chain without compromising the quality of the final product.Interesting Fact
The spread of single firing was spurred by the Industrial Revolution, when the massive demand for tableware and other ceramic products required faster and more efficient methods. The adoption of better designed kilns, the development of single-firing glazes and the improvement of fire control made this technological revolution possible.Helpful Tip
Make sure that the pieces are completely dry before starting the single firing. Excessive moisture in the clay can generate internal steam during the temperature rise, causing cracking, warping and even breakage. Experimenting with different firing curves and hold times will help you perfect this technique.
