| Titre : |
Consistent determination of the contrast ratio of white inks |
| Type de document : |
texte imprimé |
| Auteurs : |
Danny C. Rich, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 1501-1509 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Blanc (couleur)
Encre
Mesures optiques
Opacité (optique)
Réflectance
Translucidité (optique)
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Translucency is a critical property of print on flexible packaging. It forms the basis for obtaining full color gamut, hiding the contents of a package and even creating the scanner readable digital codes for point of purchase tracking. The print industry has followed the paint and decorative coatings industry, the paper industry and the plastics industry in attempting to identify measurement methods that will accurately describe translucency or its opposite, opacity. Both of these properties are defined in terms of the contrast ratio, the ratio of the luminous reflectance of a coating placed over a black and a white substrate. In this paper, the theory of diffuse reflectance spectroscopy is used to define the measurements used to determine the contrast ratio. A brief experimental study illustrates the strong points and weak points of traditional contrast ratio measurements. A better model of contrast ratio determination is hypothesized, and an experiment is designed and reported that demonstrates both the validity of the hypothesis and a method for obtaining consistent estimates of the contrast ratio. |
| Note de contenu : |
- Table 1 : Luminous reflectance (Y) and contrast ratios of the same white ink printed on different substrates and backed with different white and black backings
- Table 2 : Contrast ratio readings from three instruments |
| DOI : |
https://doi.org/10.1007/s11998-021-00515-8 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-021-00515-8.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36804 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 6 (11/2021) . - p. 1501-1509
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Consistent determination of the contrast ratio of white inks in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
