Acid treatment method for making bioderived wearable film

An acid treatment method of producing a bio-derived wearable film, the method comprising

• washing palm stem pith with a sodium hypochlorite solution;
• then
• blending the palm stem pith and water to form a raw plant mixture;
• heating the raw plant mixture to form a cooked plant mixture;
• acid treating the cooked plant mixture with an aqueous inorganic acid selected from the group consisting of nitric acid, sulfuric acid, and phosphoric acid at 30 to 60° C. to form a treated plant mixture;
• mixing the treated plant mixture with a starch, a cellulose, a synthetic polymer, a plant hydrogel, glycerin, and a dye to form an uncured mixture;
• adjusting a pH of the uncured mixture to a pH of 6.5 to 8.5;
• heating the uncured mixture to 125 to 175° C. to form a cured mixture;
• and
• drying the cured mixture at 60 to 100° C. to form the bio-derived wearable film.