Surface quality. Tiles without defects Rectangularity Water absorption AVERAGE VALUE According According According According According According Thickness > 7,5mm Moduls of rupture and breaking strength Resistance to surface abrasion BIa GL Resistance to deep abrasion Bla UGL Linear thermal expansion coefficient Thermal shock resistance Frost resistance Resistance to chemical attack Resistance to stains of glazed tiles Color resistance to light Skid resistance Average coefficient of friction No sample must show visible alteration No sample must show visible defect Declared value Minimum class...

SERRA&COCeramiche Ceramiche Serra S.p.A.