To prepare the films, the FFE (4 g) was cast onto a rimmed silicone resin plate (50 × 50 mm2) and air-blown for 12 h (27 ± 2 °C and 75 ± 10% relative humidity (RH)). The films were further dried at 25 °C and 50 ± 5% RH for 24 h in an environmental chamber (WTB Binder, Tuttlingen, Germany). Control film was prepared from the FFS containing gelatin and glycerol without palm oil and surfactant. The resulting films were manually peeled off and subjected to analyses.