| Titre : |
Black - The fine details : The measurement of deep-black coatings represents an enormous challenge for measurement technology and for the preparation of samples, requiring minute attention fo detail |
| Type de document : |
texte imprimé |
| Auteurs : |
Kai Krauss, Auteur ; Andrea Höpke, Auteur ; Markus Mahn, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 38-44 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Colorimétrie
Mesure
Noir (couleur)
Noir de carbone
Revêtements:Peinture
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Measurement devices are primarily used to analyse coloured surfaces. Errors in the calibration of the devices when measur-ing close to zero reflection range can lead to erroneous test resuits. As this is often not recognised, erroneous measure-ments are common. |
| Note de contenu : |
- Blackness values Mc, My, dM
- CIE L*A*B* colour space
- Measurement technology
- Influence of surface reflection
- Practical measurements
- Calibration for measurements in the deep-black range
- Colourimetric properties in full tone coatings
- Fig. 1 : Jetness My as a function of reflection
- Fig. 2 : Correlation between lightness L* and blackness value (jetness) My
- Fig. 3 : Absolute contribution of hue dM displayed in the CIE a*b* colour coordinate system
- Fig. 4 : 45°/0° geometry (a) and d/8° (b) geometry for measuring the blackness value and the undertone
- Fig. 5 : Diffuse and specular reflection of light on plane surfaces
- Fig. 6 : Comparison of a coated panel without and with finger prints and following inadequate cleaning
- Fig. 7 : Coated panel with streaks observed under diffuse and strong focussed light
- Fig. 8 : Colourimetric properties of different carbon blacks in water-borne 1K-PU coating. The mean primary particle size increases
- Table 1 : Colour depending on the absorption and reflection of light
- Table 2 : Comparison of measurement values of plates with different blackness levels, measured with two measurement devices (45°/0 and d/8°), and comparison of measurement with and without gloss trap
- Table 3 : Comparison of colourimetric data of a perfectly clean plate, the same plate with finger print and after several cleaning steps |
| En ligne : |
https://drive.google.com/file/d/1d_KH0vHhJ-ccMRS0GRUl4-ZnHkEdAp5m/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32524 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2019) . - p. 38-44
Aller sur edunet
Accueil
Ajouter le résultat dans votre panier Affiner la recherche
