The Characteristic Of Biocomposite Film Of Spirulina Residue As Natural DyesSiti Agustina, Aton Yulianto, Fajriyan, Ahmad Kamil, Eddy Sapto Hartanto and Firda Aulya SyamaniE3S Web Conf., 503 (2024) 08002DOI: https://doi.org/10.1051/e3sconf/202450308002