“…These are located in the "two-phase'' region of the simplified phase diagram (shown in of this three-phase system is indicated by the presence of a triangle within the two-phase region ( Fig. The technologically useful microemulsions often require high surfactant levels in order to provide sufficient interfacial coverage to completely microemulsify the required levels of ingredients, as well as to provide sufficient formulation stability to temperature and compositional changes to meet practical storage and use requirements [82,83]. The technologically useful microemulsions often require high surfactant levels in order to provide sufficient interfacial coverage to completely microemulsify the required levels of ingredients, as well as to provide sufficient formulation stability to temperature and compositional changes to meet practical storage and use requirements [82,83].…”