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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:PeintureIndex. 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 stepsEn ligne : https://drive.google.com/file/d/1d_KH0vHhJ-ccMRS0GRUl4-ZnHkEdAp5m/view?usp=drive [...] Format de la ressource électronique : 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[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20923 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : In the black Type de document : texte imprimé Auteurs : Gabriele Leder, Auteur ; Kai Krauss, Auteur Année de publication : 2007 Article en page(s) : p. 26-27 Langues : Anglais (eng) Catégories : Compatibilité chimique et physique
Pigments
Polyacryliques
Polyalkydes
PolyestersIndex. décimale : 667.9 Revêtements et enduits Résumé : The authors describe easily dispersed pigment black preparations.
Inxel pigment preparations show effective compatibility in all acrylate resins that were evaluated. The jetness values were always comparable or even higher compared to the corresponding powder pigment. The strong blue undertone in mastone applications and very good rub-out performance in tint demonstrate the excellent stability of the pigment preparations. Beside these acrylate resins also tests in alkyd and polyester systems were conducted. Here as well, very positive results were obtained. Meanwhile, various preparations based on Degusa pigment blacks can be offered in different jetness ranges. Step by step the colour range will be widened.Note de contenu : - Table : Selected acrylic resins
- Figures : 1. Dispersion times in minutes of the pigment black powder in comparison to the newly-developed preparation - 2. Comparison of jetness (Mγ) and unterdone (dM) of Inxel Black A902 in five different acrylate resins (5% pigment black on binder solid) - 3. Comparison of jetness (Mγ) and undertone (dM) of an acrylate coating prepared with a Regular Color Gas Black (RCG) and Inxel Black 1903 - 4. Optical density of draw downs based on a low colour furnace black and Inxel Black 1904 (TiO2/pigment black = 100:4, two pack acrylic coating)En ligne : https://drive.google.com/file/d/1_7URnYm6cYLmEIddrP4ljKAg1Kk4-2hv/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27334
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 197, N° 4514 (07/2007) . - p. 26-27[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 008161 - Périodique Bibliothèque principale Documentaires Disponible