Utilization of Coconut Fiber as a Basic Material for Black Batik Ink Through thePyrolysis Process: Analysis of Color Concentration and Environmentally FriendlyPotential. LIPIDA [Internet]. 2025 Oct. 20 [cited 2026 Jun. 7];5(2):185-94. Available from: https://jurnal.politap.ac.id/index.php/lipida/article/view/1834