Format and appearance – for ceramic tiles, this is a parameter that has, perhaps, the largest meaning along with the quality and brand of the manufacturer. Absolute angles, set sizes, an ideal surface – the actual must correspond to the declared. Glazed tiles supplement this list also of the same degree of staining, the absence of whitish edges or subteces.
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The tile of one article may well differ slightly in tone and caliber – this is a natural process. Technological reasons in industrial production lead to the impossibility of releasing all the batch tiles in one chromatic tonality. Usually small tint discrepancies are still present. At the end of the production, specimens are sorted, removing defective, and tiles, homogeneous in tone, are laid separately with the affix on the package of a special letter (A, B).
Ceramic tile caliber is its actual size indicated in mm and indicated by the letter W. For the above reasons, when leaving the furnace, specimens can vary in size. This is especially true when the release of tightly axial tiles. At the sorting stage, parties of products of the same size are created. The box indicates the nominal size, for example, 20 x 20 cm, and actual: W = 198 × 198. Thus, in our example, a caliber is obtained 01.