This test consists of subjecting the coated surface of the coated glass to rubbing with a felt pad in dry conditions. It is the type of pad, the loading on it and number of strokes that may cause surface degradation.
E.4. The abrasive felt pad shall have the following characteristics:
- a density of 0.52 g/cm2
- a thickness of 10 mm+- 1 mm
- a circle shape with a diameter of