Bilayer or layer-by-layer emulsions are prepared through mixing anionicprotein-stabilized emulsions with anionic polysaccharide solutions atpH > pI and then turn pH < pI; or mixing cationic protein-stabilizedemulsions with anionic polysaccharide solutions at pH < pI. It hasbeen proven that bilayer emulsions own better stability than mixedemulsions for the higher charge density