| Titre : |
Colour tolerance for liquid coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Chiara Battaglia, Auteur ; Long Lin, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 204-207 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Colorimétrie
Evaluation
Formulation (Génie chimique)
Mesure
Revêtements organiques
Rouge (couleur)
Vert
vision des couleurs
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Ensuring colour consistency between the standard and a batch is a fundamental task in coloured goods manufacturing, which is achieved through the colour matching evaluation. For this purpose, the determination of acceptable tolerances is essential to allow a clear and accurate colour communication and to avoid customer complaints. The study reported in this paper attempted to identify a reliable method to define colour tolerance limits.
One of the limits of every colour representation model is that a Euclidean global colour space cannot be uniform at the saure time in terms of both hue and chroma differences. Additionally, a tolerance measure based only on the AE value does not take into account that this difference could be due to variations along a single or multiple coordinates at once'. As a consequence, there is, by necessity, an unsatisfactory correlation between instrumental (AE) and visual (AV) tolerances.
The most accurate representation of the limits of colour perception in the CIE colour space has the shape of an ellipsoid, defined as: "the standard deviation of the boundaries around a colour target (centre point of the ellipsoids) on the CIE colour space, where all the colours within are indistinguishable to the average human eye". |
| Note de contenu : |
- MATERIALS
- METHODOLOGY : Instrumental measurements - Visual assessment
- RESULTS AND DISCUSSION : Visual and instrumental data correlation
- Fig. 1 : Tolerance ellipsoids in the CIELab colour space
- Fig. 2 : Colour variations of the green low chroma centre along the axis of the colour space
- Fig. 3 : Colour variations of the bright orange chroma centre along the axis of the colour space
- Table 1 : Pigments content of the standards
- Table 2 : Green batches formulations (percentage by weight of the coating sample)
- Table 3 : Orange batches formulations (percentage by weight of the coating sample) |
| En ligne : |
https://drive.google.com/file/d/1n163Y6uANDRwjzvcDGcGTppKqlk5NTQE/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34429 |
in SURFACE COATINGS INTERNATIONAL > Vol. 103.4 (07-08/2020) . - p. 204-207
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