Fith Khaira Nursal, Fith dan Nining, Nining dan Rahmani, Aisyah Preface, peer review declare, article: Effect of Glycerin as Plasticizer in Formulation of Grape Seed Oil (Vitis vinifera L.) Emulgel Peel-Off Mask. IOP Conference Series: Earth and Environmental Science. ISSN ISSN 1755-1315