• Zein films are easily cast from alcohol solutions. Zein is dissolved in warm (65-85°C) aqueous ethanol or isopropanol with added plasticizers.
• The solution is cooled to 40-50°C, allowing bubbling to cease prior to casting, and is then poured over a glass plate where a film is formed as the alcohol evaporates from the surface. The dried film is finally peeled off the plate (Gennadios et al., 1993a).
• The TS of zein films is similar to that of wheat gluten films, and two- to threefold lower than that of MC and HPC films.