2.2. Preparation of films
Sodium alginate and agar, alone or in the chosen blend composition, were dissolved in distilled water, at an overall concentration
of 1.5% by wt. The solution was cast onto a casting surface and the
water was let to evaporate at room temperature for 48 h. Films of
plain AA, of plain Ag and of blends AA/Ag 70/30, and 30/70 were
prepared.