S/G film had maximum solubility (Table 1) due to the highly
hydrophilic nature of the starch-based films (Rachtanapun &
Tongdeesoontorn, 2009). Glycerol, being more hygroscopic, also
results in higher solubilisation of starch-based films (Bourtoom,
2008). Oil being hydrophobic reduced the solubility of the films
(Garcia et al., 2000). Lipids helped to minimize the porosity and
cracks on the starch films (Fig. 1b) besides acting as barrier for
water penetration into the film. Tea extract slightly improved the
solubility probably due to leaching of the extract components into
water creating passages for water to penetrate and solubilise the
starch fractions.