[article]
| Titre : |
Specular gloss scales comparison between the national institute of standards and technology and the national research council of Canada |
| Type de document : |
texte imprimé |
| Auteurs : |
Maria E. Nadal, Auteur ; Mario Nöel, Auteur ; Joanne C. Zwinkels, Auteur |
| Année de publication : |
2003 |
| Article en page(s) : |
p. 45-51 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Tags : |
Amérique Nord Propriété optique Mesure comparative Etalonnage Canada Organisation nationale Organisme normalisation Equation état Brillant |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The gloss value of a test sample is determined relative to a standard, generally a polished piece of black glass. Therefore, gloss is a dimensionless quantity whose accurate determination requires standardized experimental conditions such as spectral distribution of the incident beam of light, incident and viewing angles, and a gloss standard. To help manufacturers monitor and assess specular gloss, the National Institute of Standards and Technology (NIST) Physics Laboratory provides a special test service to calibrate gloss reference standards. This facility is built around a newly rebuilt reference goniophotometer—an instrument that measures flux as a function of angles of illumination or observation—and a newly developed primary gloss standard—three wedges of highly polished, high-quality optical glass. The system has an overall (k = 2) uncertainty of 0.4%. The new service offers calibration measurements of industry working gloss standards at the specular geometries of 20°, 60°, and 85°, in compliance with the International Standards Organization (ISO) 2813 and the American Society for Testing and Materials (ASTM) D 523 documentary standards. This article describes a bilateral comparison of specular gloss scales between NIST and the National Research Council of Canada (NRCC) that has been performed. The results of this comparison show agreement within the combined uncertainties for the measurement of specular gloss of highly polished black glass. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5576 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 75, N° 943 (08/2003) . - p. 45-51
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Specular gloss scales comparison between the national institute of standards and technology and the national research council of Canada in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 75, N° 943 (08/2003)
