The thickness of the individual films was measured with a
Mitutoyo® manual micrometer, with divisions of 0.01 mm, at five
random points on each sample, which were determined to have a
mean value of 0.08 ± 0.04 mm for the TTI, 0.10 ± 0.04 mm for
chitosan films and 0.07 ± 0.03 mm for PVA films.