Production, Application, and Fastness properties of Allium cepa (Onion Skin) Dye for Sustainable Hair Coloring. NextGen Chemical Discoveries , [S. l.], v. 2, n. 2, p. 92–104, 2026. Disponível em: https://novalexpress.com/NGCD/index.php/ngcd/article/view/23. Acesso em: 25 oct. 2026.