How is glaze resistance to abrasion determined?
Since 1999, U.S. and European manufacturers have been using the same testing method for determining glaze wear resistance – with a value of 4 (on a scale from 0 to 5) being good for almost all applications except the most abrasive and dirty environments. However, lower ratings are also fine depending on where the tile will be used and how much traffic and outside dirt (especially sand, because it is abrasive) will be present.
