PSA presented some results about the sand drop test and requested information from the experts who presented the Round Robin on sand drop test.

PSA found the test well representative of the reality. The test is known because already used by test houses. The results of the Round Robin proposed a 5% delta haze. UTAC performed additional tests. France proposed to conduct some additional tests in order to verify the procedure and the relevancy of the previous tests. It was explained that the sand drop test is more severe for glass than for plastic because of the “bounce effect”, such that the particles rebound on the plastic because of the elastic deformation, while they fully impact the glass with inelastic deformation.

The Chair concluded that this is a problem of test protocols between test houses.