PROPERTY International Std.
ISO 13006/EN 176
Group Bla 		OPAL VALUE Method of Testing
Deviation in length ± 0.6% ± 0.3% ISO 10545 Pt 2
Deviation in thickness ± 5% ± 5% ISO 10545 PT 2
Straightness of Sides ± 0.5% ± 0.5% ISO 10545 PT 2
Rectangularity ± 0.6% ± 0.5% ISO 10545 PT 2
Water absorption * < 0.5% < 0.5% ISO 10545 PT 3
Mohs Hardness * > 6 > 8 EN 101
Flexural Straightness * > 35 N/mm2 > 45 N/mm2 ISO 10545 Pt 4
Abrasion resistance < 175 mm3 < 144 mm3 ISO 10545 Pt 6
Breaking Strength * 1113 N 400 N ISO 10545 Pt 4
Density (g/cc) > 2.0 2.4 ISO 10545 PT 3
Frost resistance Frost proof Frost proof ISO 10545 PT 12
Chemical Resistance No Damage No Damage ISO 10545 PT 13
Thermal Shock Resistance No Damage No Damage ISO 10545 PT 9
Colour Resistance No Damage No Damage DIN 51094
Thermal Expansion < 9 x 10-6 < 6 x 10-6 K-1 ISO 10545 PT 8
Stain Resistance Resistant Resistant ISO 10545-14
Moisture Expansion Nil Nil ISO 10545-10