The droplet size distribution of colloid mill-made emulsions was obtained using DLS and SLS, and the droplet size distribution of microfluidic-made emulsions was obtained using CLSM. The surface volume mean diameter (Sauter mean diameter, D32) of the colloid mill-made emulsion, stabilized by WPI, obtained from SLS and DLS was 1.4 µm (Figure ). By centrifugation of the colloid mill emulsions, a subnatant was obtained, which contained tiny droplets (< 200 nm diameter). Such tiny droplets were also observed in previous work by electron microscopy. The size distribution of these tiny droplets, as determined by DLS, and their volume fraction is