Sirirak, J., Worawannotai, N., Suwanchawalit, C. and Chayabutra, S. 2020. Preparation and characterization of lake pigments from sappan wood using Thai local clays. Journal of Metals, Materials and Minerals. 30, 1 (Mar. 2020). DOI:https://doi.org/10.55713/jmmm.v30i1.560.