| Titre : |
Colour stability of wood coatings pigmented with natural indigo from Isatis tinctoria after accelerated weathering |
| Type de document : |
texte imprimé |
| Auteurs : |
Juha Jordan, Auteur ; Roosa Helander, Auteur ; Päivi Laaksonen, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 210-218 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Bois -- Revêtements
Bois -- Teinture
Caractérisation
Couleurs -- Stabilité
Décoloration
Essais accélérés (technologie)
Indigo
Pigments végétaux
Revêtements -- Détérioration
|
| Index. décimale : |
667.2 Colorants et pigments |
| Résumé : |
An experimental study of artificial weathering of two outdoor coatings pigmented with natural indigo from Isatis tinctoria was carried out. The two coatings, natural indigo-pigmented boat varnish and outdoor paint, were exposed to cycles of ultraviolet light, water condensation and water spray for 40 days in a QUV test chamber. Synthetic indigo and commercial ultramarine pigment were employed as reference materials. The effects of artificial weathering on the coatings were evaluated with CIELab parameters, as well as visual inspection. Coating and pigment stability during artificial weathering were studied with reflectance spectrometry, hyperspectral imaging technology and Fourier Transform–infrared spectroscopy. According to the results, coatings with indigo proved to be more resistant to visual and spectral changes than unpigmented or commercially pigmented coatings. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Sample preparation and testing
- RESULTS
- DISCUSSION : Colour changes and visual appearance - Pigment stability - Coating stability and ageing
- Table 1 : Compositions of the coatings
- Table 2 : Exposure cycle of the test. The cycle was repeated six times |
| DOI : |
https://doi.org/10.1111/cote.12585 |
| En ligne : |
https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12585 |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37852 |
in COLORATION TECHNOLOGY > Vol. 138, N° 2 (04/2022) . - p. 210-218
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