PERERA , Hasith; HOSAN, Shen; WIJESEKARA, Dasith; VITHANAGE, Vimukthi; KOSWATTAGE, Kaveenga Rasika. Development and Characterization of a Biodegradable pH Indicator Film Using Plant-Based Pigments. International Journal of Environment, Engineering and Education, [S. l.], v. 7, n. 1, p. 61–70, 2025. DOI: 10.55151/ijeedu.v7i1.193. Disponível em: https://ijeedu.com/index.php/ijeedu/article/view/193. Acesso em: 2 may. 2026.