Solubility of BSG films in water was measured following the
method of Jouki, Yazdi, Mortazavi, and Koocheki (2013). Film sam-
ples were dried at 95◦C for 24 h in a laboratory oven and then
weighed to determine initial solid content. Pre-weighed film sam-
ples (1 cm × 3 cm) were immersed under constant agitation in
50 ml of distilled water for 6 h at 25◦C. After that period, the
remaining pieces of films were filtered and dried at 110◦C to con-
stant weight (final dry weight). The solubility was reported as the
difference between the initial and final dry matter with respect to
the initial dry matter