Film suspensions were prepared by dispersing chitosan (2.00 g/100g) in aqueous acetic acid [10]. The stoichio- metric amount of acetic acid was calculated from sample weight, taking into account the value of DA to achieve the protonation of all the NH2 sites [2]. The suspensions were homogenized by magnetic stirring at room temperature for 45 minutes. The ATH (0.50 g/100g) was added to the filmogenic suspension and homogenized. Aliquots of 9.0 mL were poured into Petri dishes (9.5 cm) and dried at room temperature for 36 hours and then kept at 28˚C in an incubator with forced air circulation for 24 hours. As the mass suspension used to cast the C-ATH was kept con- stant, the total solid content per gram of dried films was 28.2 g∙m−2.