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ASTM E259-98
Standard Practice for Preparation of Pressed Powder White Reflectance Factor Transfer Standards for Hemispherical Geometry and Bi-Directional Geometries
Automaticky preložený názov:
Štandardná prax pre prípravu Kompaktný púder White Odrazivosť Factor štandardy prevod na pologuľovitý geometrie a obojsmernú Geometries
NORMA vydaná dňa 10.10.1998
Informácie o norme:
Označenie normy: ASTM E259-98
Poznámka: NEPLATNÁ
Dátum vydania normy: 10.10.1998
Kód tovaru: NS-45677
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Anotácia textu normy ASTM E259-98 :
Keywords:
Reflectance and reflectivity-copy materials/paper, preparation of reference white reflectance standards, practice,, Specimen preparation (for testing)-paints/related coatings, reference white reflectance standards, practice
Doplňujúce informácie
| 1. Scope | ||
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1.1 This practice covers procedures for preparing pressed powder transfer standards of reflectance factor. These standards can be used in the near-ultraviolet, visible and near-infrared region of the spectrum. Procedures for calibrating the reflectance factor of materials on an absolute basis are contained in CIE Publication No. 44 (2). Pressed powder standards are used as transfer standards for such calibrations because they have a high reflectance factor which is nearly constant with wavelength and because the distribution of reflected flux resembles that from the perfect reflecting diffuser. 1.2 This standard does not purport to address all of the safety problems, 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. 1.3 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only. |
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| 2. Referenced Documents | ||
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