Chemical And Physical Behavior Of Human Hair

Nine years have elapsed since I wrote the first English edition of this book, and progress in hair science has made a second edition necessary. Since 1978, at least two new m~or scientific cosmetic journals have appeared, and four International Hair Science Symposia and one International Symposium on Forensic Hair Comparisons have been held. Thus, continuing studies in hair science have been numerous in the past nine years, so much so that a large proportion of the text had to be completely rewritten. In addition, a number of omissions that were kindly pointed out by reviewers have been included in this edition, as well as corrections sent to me by readers. I sincerely hope that this new edition fulfills the original purposes: to provide a reasonably up to date and complete account of the chemical and physical properties and behavior of human hair, and to serve as a convenient starting point for hair research-and, as indicated in the first edition, not to be the final word.

Human hair is the subject of a wide range of scientific investigations. Its chemical and physical properties are of importance to the cosmetics industry, forensic scientists, and to biomedical researchers. This updated and enlarged fourth edition continues the tradition of its predecessor as being the definitive monograph on the subject. It now contains new information on various topics including: chemical hair damage, the cause of dandruff, skin and eye irritation, hair straightening, and others. Chemical and Physical Behavior of Human Hair is a teaching guide and reference volume for cosmetic chemists and other scientists in the hair products industry, academic researchers studying hair and hair growth, textile scientists, and forensic specialists.

Reviews the chemical and physical properties, care and treatment of hair, including product development. The book discusses ethnic hair, its appropriate management measures and products; emphasizes manufacturing and sales strategies for domestic and international product viability; surveys instrumental methods for product performance evaluation; presents sensory and market research techniques for optimum consumer satisfaction; and more.

This book presents the biophysics of hair. It covers the structure of hair, its mechanical properties, nanomechanical characterization, tensile deformation, tribological characterization, the thickness distribution and binding interactions on hair surface.

"Sun Protection in Man" looks at the beneficial and harmful effects of solar radiation. The physiological consequences of sun exposure have been systematically studied starting at the end of the nineteenth century and we now have accumulated knowledge about how Caucasian and Asian skins reacts to solar radiation. The chemical effects of solar ultraviolet radiation have been analyzed with particular emphasis during the second half of the twentieth century. Research on micro-organisms has allowed us to understand the mechanisms of UV-induced mutagenesis and photosensitization. Studies with laboratory rodents have opened the path to the understanding of UV-induced immune-depression, carcinogenesis, photo-damage and photo-aging. The results of these studies have enabled other scientists to investigate the same phenomena in human organs such as the skin and the eye. UV radiation damages hair, as well. The present knowledge in these fields is summarized in some of the chapters of this monograph. Mass phenomenon in Europe with the generalization of summer vacations which were a consequence of social reforms introducing the concept of "paid vacations". This created a need for protection and opened a market for sunscreens. This monograph is concerned with sun protection as a whole and is not just "another book on sunscreens". Nonetheless, in these days of general concern, it is important to learn about the efficiency of sunscreens. Several authors discuss how to reduce the number of impinging photons and explain why sunscreens seem to offer less protection than expected. Guidelines are given on how to use sunscreens in everyday life, which are expressed rigorously though clearly, for access to the common reader. Our knowledge on the relationship between sun and humans is at the early stages of development. Industrial and commercial activities are concerned by the development of this knowledge, and rules have been and will be promulgated to guarantee efficacy and safety of sun-products. It is hoped that this monograph will be of interest to the scholar, the layman and the legislator.

This state-of-the-art reference provides comprehensive multidisciplinary coverage of the most recent information on cosmetic ingredients, finished products, target organs, delivery systems, and current technology in safety, toxicology, and dermatological testing. Discussing modern innovations such as active cosmetics for the hair, skin, and