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ASTM E1477 Revision 98A, December 10, 1998
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Standard Test Method for Luminous Reflectance Factor of Acoustical Materials by Use of Integrating-Sphere Reflectometers
Includes all amendments and changes through Reapproval Notice , 2013
Page Count:2
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This test method covers the measurement of the luminous reflectance factor of acoustical materials for use in predicting the levels of room illumination.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.