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ASTM E97

82nd Edition, October 10, 1982

Complete Document

Standard Test Methods for Directional Reflectance Factor, 45-Deg 0-Deg, of Opaque Specimens by Broad-Band Filter Feflectometry

Includes all amendments and changes through Reapproval Notice , 1987


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Superseded By: ASTM E1347

EN
Additional Comments:
W/D S/S BY ASTM E1347
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Product Details:

  • Revision: 82nd Edition, October 10, 1982
  • Published Date: January 1987
  • Status: Superseded By:
  • Superseded By: ASTM E1347
  • Document Language: English
  • Published By: ASTM International (ASTM)
  • Page Count: 4
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

This method covers the determination of the 45-deg, 0-deg directional reflectance factor of nonfluorescent opaque specimens by means of filter photometers. To obtain similar results from spectrophotometers, see Method E308.

NOTE 1-The values stated in inch-pound units are to be regarded as the standard.

NOTE 2-This method has been developed for determining (1) the daylight luminous reflectance factor of paint, opaque white porcelain enamels, and ceramic whitewares; and (2) the blue-light reflectance factor (sometimes called "brightness") of uncolored papers and pulps in sheet from. The method may also be used for determining the reflectance factor of other opaque specimens.

NOTE 3-The blue-light reflectance factor of paper provides a measure of freedom from yellowness such as results in pulp and paper from the presence of lignin and other so-called impurities left by incomplete bleaching.

NOTE 4-Blue-light reflectance factor by this method differs slightly, both spectrally and geometrically from the TAPPI Standards T 217 and T 452. The TAPPI methods are considered to be standard for the pulp and paper industry when brightness measurements are to be made.

This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.