3.3. Water vapor barrier properties The WVP of CH films containing CEO or CWO is shown in Fig. 1.In the present study, the WVP of the CH composite films was significantly (P < 0.05) affected by the incorporation of CEO orCWO compared to control films. The addition of either CEO orCWO significantly (P < 0.05) reduced the WVP of the films, having attained a maximum permeability reduction of 63% in thefilm prepared with 30% w/w CWO. Films containing CWO had lower WVP than those with an equal concentration of CEO. Inthe present study, CH films containing CEO showed no significant