ASIAGWU, A.; OTUTU , J.; ONYESOM, I.; EBIGWAI, J. Extraction and Application of Natural Colourant from the Bark of Berlinia Grandiflora on Cotton and Polyamide 6 Fabrics. Iraqi Journal of Science, v. 62, n. 6, p. 1745-1760, 1 Jul. 2021.