Based on values of transparency (Table 2), oil-incorporated films had the lower transparency than control film as confirmed by the higher transparency value. The decreases in transparency of theedible films were connected with the decrease in light transmittance when essential oil was added. Tongnuanchan et al. (2012)have reported that the inclusion of different types of essential oil (bergamot, kaffir lime, lemon and lime) into fish skin gelatin may decrease the transparency of film. These authors have stated that the oil droplets localized in the film matrix have lowered the transparency of the gelatin film, more presumably due to the scattering of light. The intensity of light-scattering phenomena mainly depends on the concentration and the extent of dispersion of the oil droplets in the film matrix (Monedero et al., 2009). The higher the droplet concentration resulted in the greater the light scattering intensity, and consequently decreased the transparency values (Sánchez-González et al., 2009). However, transparency values for the biocomposite films in the present study were lower thanthe values measured for LDPE (4.26A600/mm), which is a commercial 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 coating materials.