“…The incorporation of such natural dyes in polysaccharide-based films have produced reliable responses to pH variations making them a diagnostic tool to ensure the safety and quality of food at the time of purchase (Halász & Csóka, 2018;Kurek et al, 2018;Liu et al, 2018;Chen et al, 2019;Liang et al, 2019). Starch extracted from tapioca, yam, corn has been considered a promising agent as a film component for food packaging (Othman et al, 2019;Santoso et al, 2019;Song et al, 2019) as it offers advantages by being obtained from renewable sources, it is biodegradable, has a relatively low cost, and is generally easy to obtain (Chen et al, 2019;Luchese et al, 2018).…”