Sumule A. Optimization of Carnauba Wax and Paraffin Wax in Beetroot Extract Lipstick (Beta vulgaris) Using Simplex Lattice Design Method. JFSI [Internet]. 2024Dec.28 [cited 2025Aug.1];7(2):31-40. Available from: https://journal.stifera.ac.id/index.php/jfsi/article/view/750