The efficiency of the studied ChD coatings in the reduction of WVTR is not significant, but appears promising considering the results for coatings based on chitosan combined with other polymers. A few examples are the following: Reis et al.25 reported a 51% reduction of the WVTR for Kraft paper coated with 1.8 g/m² chitosan and palmitic acid films; Despond et al.26 obtained an excellent water vapour barrier effect with two- layer coatings consisting of a bottom layer of 7 g/m² chitosan and a top layer of 2 g/m² carnauba wax; and Fang et al. reported 98% reductions of WVTR for 7.4 g/m² two-layer coatings based on chitosan and poly(vinyldene chloride).