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ASTM E313-98
Standard Practice for Calculating Yellowness and Whiteness Indices from Instrumentally Measured Color Coordinates
Automaticky preložený názov:
Štandardná prax pre výpočet žltnutie a belosť Indexy z inštrumentálnych Nameraná farebnými súradnicami
NORMA vydaná dňa 10.12.2000
Informácie o norme:
Označenie normy: ASTM E313-98
Poznámka: NEPLATNÁ
Dátum vydania normy: 10.12.2000
Kód tovaru: NS-46378
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Anotácia textu normy ASTM E313-98 :
Keywords:
color, colorimetric analysis, instrumental measurement, color/light, reflectance, reflectivity, whiteness indexes, yellowness indexes, ICS Number Code 17.180.20 (Colours and measurement of light)
Doplňujúce informácie
| 1. Scope | ||||||||||||||||||||||||||||||||||
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1.1 This practive provides numbers that correlate with visual ratings of yellowness or whiteness of white and near-white or colorless object-color specimens, viewed in daylight by an observer with normal color vision. White textiles, paints, and plastics are a few of the materials that can be described by the indices of yellowness or whiteness calculated by this practice. 1.2 For a complete analysis of object colors, by a specified observer and under a specified illuminant, use of three parameters is required. For near-white specimens, however, it is often useful to calculate single-number scales of yellowness or whiteness. This practice provides recommended equations for such scales and discusses their derivations and uses, and limits to their applicability (see also Ref (1)). 1.3 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 . |
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| 2. Referenced Documents | ||||||||||||||||||||||||||||||||||
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