Increasing the ratio of water in all studied systems led to a decrease in stability, and PW-containing emulsions with only 10 wt% of water demonstrated no phase separation (excluding systems with 5% of PW, which were unstable regardless of the amount of water). We assumed that in emulsions with higher water and PW contents, there might have been too much wax in the oil phase,which probably breaks the film on the newly formed and more densely packed droplets, causing fracturing and draining and finally emulsion instability [14]. In order to confirm this theory we used a different method of emulsion preparation. In the experiment described below, we followed the similar method as developed by Rousseau, namely the slow-static method [7]. Initially, the aqueous and the oil phases were heated to 75◦C and brought together under the stirring. But after cooling the system to 45◦C the stir-ring was stopped and further cooling was done without mixing. At 25◦C a stable, gel-like emulsion was obtained. It was previously stated that the gel-like structure can improve the emulsion stability by immobilizing emulsion droplets in the formed structure [7].As can be seen in Fig. 1 the emulsion contained big water droplets and large needle-like of PW crystals however the crystals were only present near the droplets and not in the continuous phase, which in contract to what was observed previously (Fig. 3c). Therefore it is possible that the dispersed wax particles could cause the rupture of droplets and the emulsion breakdown under continuous stirring.