Solvent casting technique: The films were prepared by casting chitosan (1%), gelatin (10%) solution separately and different proportions (1:10, 1:20, 1:30, and 1:40) of both chitosan and gelatin (composite films) as shown in table 1 with 0.2ml. ethylene glycol as plasticizer after vacuum filtration for removal of entrapped air bubbles on the plastic tray and air dried at room temperature[21].