SURFACTANT LOCATION 375 REFERENCES (1) Griffin, •V. C., Classification of surface-active agents by HLB, J. Soc. Cosmetic Chemists, 1,311-26 (1949). (2) Griffin, W. C., Calculation of HLB values of nonionic surfactants, Ibid., 5, 249-56 (1954). (3) Becher, P., Emulsification, in Schick, M. J., Nonionic Surfactants, Marcel Dekker, Inc., New York, 1967, pp. 604-26. (4) Sherman, P., Emulsion Science, Academic Press, New York, 1968, pp. 140-53. (5) Becher, P., and Birkmeier, R. L., The determination of HLB by gas-liquid chromatog- raphy, ]. Am. Oil Chemists' Soc., 41, 169-72 (1964). (6) Gorman, W. G., and Hall, G. D., Use of dielectric constants in the classification of sur- factants, J. Pharm. Sci., 52, 442-6 (1963). (7) Ross, S., Chen, E. S., Becher, P., and Ranauto, H, J., Spreading coefficient and hydrophile- lipophile balance of aqueous solutions of emulsifying agents, ]. Phys. Chem., 68, 1681-3 (1959). (8) Becher, P., Spreading, HLB, and emulsion stability, ]. Soc. Cosmetic Chemists, 11, 325-32 (1960). (9) Davies, J. T., A quantitative kinetic theory of emulsion type, I. Physical chemistry of the emulsifying agent, Proc. Intern. Congr. Surface Activity, 2nd, London, 1957, 1, 426-38. (10) Davies, J. T., and Ridcal, E. K., Int'erfacial Phenomena, Academic Press, New York, 1963, pp. 359-83. (11) Sbinoda K., and Saito H., The stability of O/W type emulsions as function of tem- perature and the HLB of emulsifiers: the emulsification by PIT-method, J. Colloid In- terface Sci., •0, 258-63 (1969). (12) Becher, P., Emulsions: Theory and Practice, 2nd Ed., Reinhold Publishing Corp., New York, 1965, pp. 249, 422. (13) The Atlas HLB System, Atlas Chemical Industries, Wilmington, Del., 1963, pp. 5-8. (14) Ohba, N., Hydrophile-lipophile balance values for O/W emulsions stabilized by non- ionic surfactants, I. Hydrophile-lipophile balance values of nonionic surfactants de- termined by emulsification, Bull. Chem. Soc. Japan, •5, 1016-20 (1962). (15) Ohba, N., Hydrophile-lipophilc balance values for O/W emulsions stabilized by non- ionic surfactants, II. "Required hydrophile-lipophile balance" values of the oil mix- ture, Ibid., •5, 1021-5 (1962). (16) Griffin, W. C., Ranauto, H. J., and Adams, A.D., Further studies on emulsion systems, Am. Per[umer Cosmetics, 81, 31-42 (1966). (17) Lin, T. J., Effect of initial surfactant locations on the viscosity of emulsions, J. Soc. Cosmetic Chemists, 19, 683-97 (1968). (18) Lin, T. J., and Lambrechts, J. c., Effect of initial surfactant location on emulsion phase inversion, Ibid., 20, 185-98 (1969). (19) Lin,T. J., and Lambrechts, J. C., Migration of surfactants in a two-phase system, Ibid., 20, 627-38 (1969). (20) Becher, P., Present status of hydrophile-lipophile balance, Am. Per[umer, 76, No. 9, 33-8 (1961). (21) Riegelman, S., and Pichon, G., A critical re-evaluation of factors affecting emulsion sta- bility, I. The hydrophilic-lipophilic balance postulate, Ibid., 77, No. 2, 31-3 (1962).

376 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS IFSCC CONGRESS TO BE HELD SEPTEMBER 20-25, 1970 The Spanish Society of Cosmetic Chemists will host the Sixth Con- gress of the International Federation of Societies of Cosmetic Chemists on September 20-25, 1970, in Barcelona, Spain. Original unpublished papers concerning the following areas of cosmetic technology are now being solicited: 1. Color in cosmetics 2. Physical-chemical aspects of cosmetics 3. Biochemistry and dermatology 4. Practical science of cosmetics 5. Cosmetic regulations standardization of raw materials An International Jury will select the recipient of the $1000 IFSCC Award which will be •ven for the most meritorious paper presented at the Congress. To be eligible for this Award, papers must be submitted before March 20, 1970. Further information concerning manuscript requirements is available from: Sociedad Espanola de Quimicos Cosmeticos Calle Mallorca, 279 Barcelona (9) Espana