What is meant by tonality and caliber?
Ceramic is a natural material with a natural composition which becomes resistant when fired at very high temperatures. This process, however, can cause slight differences in the shades of colour and in the actual dimensions of a tile between one batch and the next. Therefore, tiles are grouped before packaging according to their shade and their caliber. These are then indicated on the label of every pack. It is important to purchase tile that has the same tonality and caliber, if at all possible, to ensure a pleasing aesthetic appearance as well as consistent grout joints. Using different caliber sizes result in a variantion in grout joint widths.
