2.3.2. Film solubilityFilm solubility was tested according to the method reported inthe literature (Gontard et al., 1992). Three pieces (1 × 4 cm2) offilm were weighed to the nearest 0.0001 g and afterwards dried in a forced-air oven at 105◦C for 24 h. At this time, films were regained and re-weighed to calculate their initial dry weight (Wi).Then, the samples were submerged in distilled water (30 ml) andmildly shaken (100 rpm) for 24 h at ambient temperature. The sam-ples were then filtered using Whatman No. 1. The filter paper plusundissolved portions was dried in an air-circulating oven (105◦C,24 h) and weighed (Wf). The solubility of film (FS %) was determinedusing the Eq.