466 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS (17) Bereston, E. S., •7. din. Med. dssoc., 156, 1246 (1954). (18) Jones, K. K., Spencer, M. C., and Sanchez, S. A., •7. Investigative Dermatol., 17, 213 (1951). (19) Rothman, S., "Physiology and Biochemistry of the Skin," Chicago, University of Chicago Press (1954). (20) Van Scott, E. J., and Flesch, P., ,4rch. Dermatol. andSyphilol., 70, 141 (1954). (21) Van Scott, E. J., and Lyon, J. B., 5 e. Investigative Dermatol., 21, 199 (1953). (22) Van Scott, E. J., and Flesch, P., Science, ll9, 70 (1954). (23) Minard, F. N., Laboratory Records, Dept. of Biochemistry, Abbott Laboratories. (24) Rothrvan, S., 5 e. •lm. Med. •issoc., 159, 1124 (1955). MEASUREMENT OF STATIC CHARGE ON HAIR* By ChARICE M. Minus, VIRGINIA C. ESTF. R and HYMAN HENKIN Colgate-Palmolive Co., •7ersey City 2, N. •7. THE EVaLUaTION of hair properties and the effect of treatments, such as shampoos, rinses, etc., on these properties are matters of interest and importance to all who are engaged in the manufacture and sale of products for use on the hair. Estimation of some of these properties, as, for example, hair manageability, is subjective in nature and may have dif- ferent meanings for different individuals undoubtedly they are com- posites of other more fundamental properties. Other hair attributes are more amenable to direct scientific measurement and study of these proper- ties may lead to a better understanding of some of the more complicated subjective shampoo characteristics. Such properties as "fiyawayness" and ease of combing are at present not even clearly defined, much less sub- ject to quantitative measurement. In our opinion both of these proper- ties are related, at least to some extent, to the development and rate of dissipation of electrical charge on the hair fibers. A study was undertaken of the measurement of static charge on hair and of some of the factors contributing to such charge. This problem bears a close relationship to the problems of static charge encountered in the manufacture of textiles and in the wearing of textile fabrics. Since the advent of synthetic fibers which are more hydrophobic in nature than the natural fibers, this has become a very important problem in the textile industry and considerable effort has been expended on methods of measur- ing static charge on textiles (1-3). Examination of the various test procedures described in the textile litera- ture showed that none of them appeared completely applicable to the study of electrostatic properties of hair, either on heads or on separate tresses. *Presented at the May 18, 1956, Meeting, New York City.

466 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS (17) Bereston, E. S., •7. din. Med. dssoc., 156, 1246 (1954). (18) Jones, K. K., Spencer, M. C., and Sanchez, S. A., •7. Investigative Dermatol., 17, 213 (1951). (19) Rothman, S., "Physiology and Biochemistry of the Skin," Chicago, University of Chicago Press (1954). (20) Van Scott, E. J., and Flesch, P., ,4rch. Dermatol. andSyphilol., 70, 141 (1954). (21) Van Scott, E. J., and Lyon, J. B., 5 e. Investigative Dermatol., 21, 199 (1953). (22) Van Scott, E. J., and Flesch, P., Science, ll9, 70 (1954). (23) Minard, F. N., Laboratory Records, Dept. of Biochemistry, Abbott Laboratories. (24) Rothrvan, S., 5 e. •lm. Med. •issoc., 159, 1124 (1955). MEASUREMENT OF STATIC CHARGE ON HAIR* By ChARICE M. Minus, VIRGINIA C. ESTF. R and HYMAN HENKIN Colgate-Palmolive Co., •7ersey City 2, N. •7. THE EVaLUaTION of hair properties and the effect of treatments, such as shampoos, rinses, etc., on these properties are matters of interest and importance to all who are engaged in the manufacture and sale of products for use on the hair. Estimation of some of these properties, as, for example, hair manageability, is subjective in nature and may have dif- ferent meanings for different individuals undoubtedly they are com- posites of other more fundamental properties. Other hair attributes are more amenable to direct scientific measurement and study of these proper- ties may lead to a better understanding of some of the more complicated subjective shampoo characteristics. Such properties as "fiyawayness" and ease of combing are at present not even clearly defined, much less sub- ject to quantitative measurement. In our opinion both of these proper- ties are related, at least to some extent, to the development and rate of dissipation of electrical charge on the hair fibers. A study was undertaken of the measurement of static charge on hair and of some of the factors contributing to such charge. This problem bears a close relationship to the problems of static charge encountered in the manufacture of textiles and in the wearing of textile fabrics. Since the advent of synthetic fibers which are more hydrophobic in nature than the natural fibers, this has become a very important problem in the textile industry and considerable effort has been expended on methods of measur- ing static charge on textiles (1-3). Examination of the various test procedures described in the textile litera- ture showed that none of them appeared completely applicable to the study of electrostatic properties of hair, either on heads or on separate tresses. *Presented at the May 18, 1956, Meeting, New York City.