Colour properties of poly(vinyl alcohol)–anthocyanin blends

• Main Authors: Aziz, N., Mat Nor, N.A., Mohd-Adnan, A.F., Taha, Rosna Mat, Arof, Abdul Kariem
• Format: Article
• Published: Springer 2016
• Subjects: Q Science (General); QC Physics; QH Natural history
• Online Access: http://eprints.um.edu.my/18409/; https://doi.org/10.1007/s11082-016-0715-7

This work aims to analyze the colour variation and stability of anthocyanin colourant. Anthocyanin has been solvent-extracted from fruit pulps of Melastoma malabathricum. Different weight percentage of ferulic acid (FA) have been added to the anthocyanin solution and exposed to 17.55 lux UV-B irradiation for 93 days. The colour stability has been evaluated using Commission Internationale de l’Eclairage (CIE) colour system. The FA has been added to anthocyanin solution that contains.5 % trifluoroacetic acid (TFA) has been mixed with poly (vinyl alcohol) or PVA for the development of a coating system. The PVA–anthocyanin coating without FA has the most unstable colour. Coating with 3 % FA addition resulted in better colour stability. Colour stability has been analysed via lightness (L*), chromaticity(c*), hue angle (H°), coordinates a* and b* as well as colour saturation.