Marca Corona Pavimenti, 2012

Coefficient of linear thermal expansion ISO 10545/8
It defines a test method to calculate the coefficient of linear thermal expansion of ceramic tiles with temperatures that range from 20° to 100°.
Thermal shock resistance ISO 10545/9
It specifies a test method to calculate the thermal shock resistance (sudden temperature variation ranging from +15° and +145°C) and defines the resistance of ceramic tiles to bear,
without damages, stresses due to dimensional variations caused by a sudden thermal shock especially when repeated over time.
Crazing resistance ISO 10545/11
It defines a test method to calculate the crazing resistance of glazed ceramic tiles, except for those cases where crazing is decorative feature of tiles themselves.
Frost resistance ISO 10545/12
Frost resistance is a quality tiles have when they are subjected to water at temperatures lower than 0°C without being damaged by stress generated by their moisture content
freezing. The tiles are defined as resistant or not.
Marca Corona porcelain stoneware tiles do not suffer from damages caused by frost, thanks to their compactness and low porosity.
Resistance to chemicals ISO 10545/13
Resistance to chemicals is the capacity of the glaze at room temperature to tolerate contact with chemicals (domestic products, staining chemicals, pool additives, acids and solvents)
without alteration in its appearance. Under standard, tiles are classified in decreasing order of resistance for all chemicals, exept stains, as follows:
Testing solutions Ammonium chloride / Sodium hypochlorite L Solutions H Solutions
No visible effect (A). UA ULA UHA
Visible effects on cut edges (B). UB ULB UHB
Visible effects on cut edges, on non-cut edges and on the working surface (C). UC ULC UHC
Testing solutions Ammonium chloride / Sodium hypochlorite L Solutions H Solutions
No visible effect (A). GA(V) GLA(V) GHA(V)
Sensible surface appearance change (B). GB(V) GLB(V) GHB(V)
partial or complete loss of original surface (C). GC(V) GLC(V) GHC(V)
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