Exemplary of the amphiphilic emulsifying agents which can be used in the instant invention are: naturally-occurring, lyophilic colloids including gums, proteins and polysaccharides, such as gum arabic, gum tragacanth, agar, gelatin and starch; and synthetic materials such as methyl cellulose, polyvinyl pyrrolidone, polyvinyl alcohol and copolymers of methyl vinyl ether and maleic anhydride.