In Fig. 4, the droplet size distribution curves of the M seriesof emulsions are presented. The time period of fifteen dayswas chosen for these plots as it was the most indicative of thechanges that occurred in the oil droplet sizes. It is evident that the narrowest distribution corresponds to the emulsion with 2%(w/v) mastic resin and the maximum of its curve corresponds tothe smallest droplet diameter (10 _m) of the graph. This resultsuggests that the particular emulsion would be stable with timein terms of droplet coalescence and ultimately phase separation.When the initial size of the droplets is rather small and remainssmall with time, their coalescence rate could be considered lowunder certain conditions, otherwise the mean droplet diameterwould increase. This finding indicates that the films that surroundthe droplets in the particular emulsion are quite durable andresistant [23]. In fact, the same emulsion exhibited the fewestchanges in droplet size distribution over the sixty-day period ofthe study (data not shown) and, consequently, it was consideredto be the most stable of the third series (M). For this reason it waschosen for further tests in combination with white and red wine.More specifically, the optimum emulsion in terms of stabilitywas selected from each series (W, R and M) and two new testemulsions were prepared as a combination of their constituents;one emulsion with 20% (v/v) white wine in the aqueous phase and2% (w/v) mastic resin as additive, and a second emulsion with 20%(v/v) red wine in the aqueous phase and 2% (w/v) mastic resin.In the first case of the emulsions with the white wine