Hydrated solution of emulsion continuous phase was prepared by dissolving wall material powders in distilled water using a high speed blender (Model RW 20.n, IKA Works, Malaysia). They were produced one day before emulsification and kept overnight in a shaking water bath (Ratek Instruments, VIC, Australia) to warrant a full saturation of the polymer molecules. For starch-based biopolymers, the temperature of water bath was adjusted to 60 °C while for proteins, they were kept at ambient temperature to avoid changes due to temperature. In the case of WPC, their solutions were prepared by dispersing the desired amount of their powder (10 wt%) into buffer solution (5 mM phosphate buffer, pH 7). The pH of WPC solutions was adjusted back to pH 7.0 using 1 M HCL if required. The total concentration of dissolved solid was 40% (w/w) that was composed of 30 wt% maltodextrin and 10 wt% of emulsifying ingredients including one of the biopolymers of Hi-Cap or WPC.