Miftahul Khair and Silvia Deswinta Maharani Damanik 2026. Comparative Evaluation of Hydrochloric and Acetic Acid Pretreatments for Chicken-Skin Gelatin and Its Application in Edible Films. EduMatSains : Jurnal Pendidikan, Matematika dan Sains. 11, 2 (Oct. 2026), 216–230. DOI:https://doi.org/10.33541/edumatsains.v11i2.8780.