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1.1 This test method describes a procedure for estimating the resistance of transparent plastics to one kind of surface abrasion by measurement of its optical effects.

1.2 Abrasive damage is judged by that percentage of transmitted light which, in passing through the abraded track, deviates from the incident beam by forward scattering. For the purpose of this test method, only light flux deviating more than 0.044 rad (2.5

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