For the working area, a tile with a more porous structure and a thick layer of glaze, with a smooth, glossy or matte surface, will greatly simplify the care. A preferred option for a kitchen apron will be a single firing tile, 1 grade, class AA or A (resistance to moisture and chemicals). Also, clinker tiles are perfect for the walls of the kitchen, which has higher strength, moisture resistance and is made of environmentally friendly material: special clay, which has undergone prolonged heat treatment at high temperatures.