It's a porcelain tile and the designs are obtained by applying soluble salts on the surface of the brick tiles before firing. The body of the Vitrum line is porcelain and the designs change according to the type of soluble salt applied. In this respect the design penetrates approximately 3mm into the body of the tile. Taking one model, the designs are uniform and do not change from tile to tile and the line is based on a beige colour range. This technique is developed for internal flooring of private and residential areas. The Vitrum line is also suitable for internal and external cladding.