*2.3.4.2 Lipid-protein edible coatings*

Protein has large number of polar group and is hydrophilic in nature. Due to its hydrophilicity, it has poor water vapour barrier, although it has good mechanical and oxygen property. Lipid is hydrophobic in nature. By combining these two makes film with stronger and good barrier properties as well as organoleptic property enhances and increases its market value [99]. Combined film also improves its water solubility [100]. To improve optical, mechanical and barrier properties of sodium caseinate– oleic acid–beeswax film, calcium caseinate is added to it [101].
