PHYSICAL TESTS OF ORGANIC INK BASED ON GUM ARABIC, GAMBIER, AND JANGGELAN LEAVES. Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics, [S. l.], v. 7, n. 1, p. 54–61, 2025. DOI: 10.15408/fiziya.v7i1.40521. Disponível em: https://journal.uinjkt.ac.id/al-fiziya/article/view/40521. Acesso em: 26 jan. 2026.