Although the properties of composite films based on caseinate
have been studied in several publications, there are very few
published data on caseinate–chitosan films (Pereda, Aranguren,
& Marcovich, 2008). Moreover, most of the cited literature about
bilayer coatings on paper described systems where a lipid forms a
second layer over the polysaccharide or protein-coating (Despond
et al., 2005; Khwaldia, 2010). To our knowledge, no research has
been reported on bilayer systems including two hydrocolloid layers
for paper coating.