Based on values of transparency (Table 2), oil-incorporated filmshad the lower transparency than control film as confirmed by thehigher transparency value. The decreases in transparency of theedible films were connected with the decrease in light transmit-tance when essential oil was added. Tongnuanchan et al. (2012)have reported that the inclusion of different types of essentialoil (bergamot, kaffir lime, lemon and lime) into fish skin gelatinmay decrease the transparency of film. These authors have statedthat the oil droplets localized in the film matrix have loweredthe transparency of the gelatin film, more presumably due to thescattering of light. The intensity of light-scattering phenomenamainly depends on the concentration and the extent of dispersionof the oil droplets in the film matrix (Monedero et al., 2009). Thehigher the droplet concentration resulted in the greater the light-scattering intensity, and consequently decreased the transparencyvalues (Sánchez-González et al., 2009). However, transparency val-ues for the biocomposite films in the present study were lower thanthe values measured for LDPE (4.26A600/mm), which is a commer-cial plastic intended for packaging (Guerrero et al., 2011). Accordingto data achieved in this study, the biocomposite films without/withOEO are clear enough to be used as see-through packaging or coat-ing materials.