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.5 The test piece shall be cleaned in accordance with 6.1 prior to commencement of the test. The test sequence shall commence within 30 min of the sample being cleaned.
E.6 The test piece shall be mounted in the equipment in such a way that movement is not possible. The metal finger containing the felt pad shall be lowered on to the glass surface and a load of 4 N applied perpendicular to the glass surface via the felt pad.