Chapter 13: Advances in Hair Styling Raymond Rigoletto, Anand Mahadeshwar, PhD, Linda Foltis, and David Streuli . ..........................................................................415 Chapter 14: The Effects of Aging on Hair— More Than Just Amount Michael J. Flagler, James R. Schwartz, Clarence R. Robbins, and Thomas L. Dawson. .................................................................451 Chapter 15: Hair Care Product Claims Trefor Evans ....................................................................................491 Appendix A: Keratin and KAP Nomenclature ...............................525 Appendix B: Sample Calculation of the Elastic Modulus .............527 Author Biographies . ............................................................................529 Index . .....................................................................................................539