Mechanical Characteristics of Plastic Films Made from Potato Peel Waste (solanum tuberosum L.) with Variations of Acetic Acid and CMC Fira Rahmawati, Muhammad Fahmi Hakim, Kamilah Pathun Ni’mah Tekper : Jurnal Teknologi dan Manajemen Industri Pertanian Vol. 4 No. 3 2023 DOI 10.33772/tekper.v4i3.45193