Body: A vitreous (low water absorption) or semi-vitreous (medium-low water absorption) body or substrate is involved, with a white or light colour, or a colour going from buff to a dark brownish grey. Body colour does not affect other product characteristics. The texture is fine and homogeneous with heterogeneous elements hardly being visible to the naked eye. Surfaces and edges are regular with a good finish.
Fair face: The matt to high-gloss, fair face glaze may be white, plain, marble, mottled, granulated or decorated with different patterns or designs.
Shapes and sizes: Square shapes prevail and sizes range from 10 cm x 10 cm to 60 cm x 60 cm. Some models have one or more chamfered corners, and rectangular products are also marketed. The most common fittings and trims are insets and listels, along with skirtings, steps, and cheeks.