A coarse emulsion was made by adding 15 wt.% of the stripped soybean oil (with or without BODIPY 665/676) to the continuous aqueous phase, and high-speed stirring was applied at 11,000 rpm for 1 min with a rotor-stator homogenizer (Ultra-turrax IKA T18 basic, Germany). A fine emulsion was prepared by passing the coarse emulsion through a lab-scale colloid mill with a gap width of 0.32 mm (IKA Magic Lab, Staufen, Germany), operating for 1 min at 26,000 rpm. During operation, the colloid mill was cooled with water at 4 °C.