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ASTM E1651-94(2004) Standard Test Method for Total Luminous Reflectance Factor by Use of 30/t Integrating-Sphere Geometry (Withdrawn 2004)
standard by ASTM International, 01/01/2004
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1.1 This test method covers measurement of total luminous reflectance factor of opaque, nonfluorescent specimens by use of an integrating-sphere reflectometer with illumination at an angle of 30