Emulsion drop size depends on the both fo rmulation and compos ition of the surfactant-oil-water system. as well as on the stirring conditions prevailing during emulsification. General trends versus f ormulation or compos ition changes are presented. Howevel; it is shown that the effects are not independent and that a prop er combination of these param eters allows the attainm ent of vel)' small drop size. even at low stirring energy. An overall phenomenology is presented on a twodimensional fo rmulation-comp osition map fro m which it is easy to select the best emulsification conditions.

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