By Dale H. Johnson

Reports the chemical and actual houses, care and remedy of hair, together with product improvement. The ebook discusses ethnic hair, its applicable administration measures and items; emphasizes production and revenues thoughts for family and foreign product viability; surveys instrumental tools for product functionality overview; provides sensory and industry learn strategies for max buyer delight; and extra.

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Additional info for Hair and hair care

Example text

Topics are drawn from a wide spectrum of disciplines ranging from chemistry, physics, biochemistry, and analytical and consumer evaluations to safety, efficacy, toxicity, and regulatory questions. Organic, inorganic, physical, and polymer chemistry, emulsion technology, microbiology, dermatology, and toxicology all play a role in cosmetic science. There is little commonality in the scientific methods, processes, or formulations required for the wide variety of cosmetics and toiletries manufactured.

One of the functions of hair conditioners is to reduce the force of friction on the surface of hair fibers, thus facilitating distentanglement and reducing the possibility of stripping of the scale structure. The result is a longer life for the protective scale structure, and for hair potentially a longer period prior to fracture and splitting of the hair tip. The technique of entanglement of hair used by hairdressers called back-combing raises and causes removal of scales by combing the hair from tip to scalp.

Also present in human hairs are granules of melanin, the material that gives various hairs their characteristic color. Melanin granules are formed in cells called melanocytes at the base of the hair follicle. These melanin granules are extruded from the cells to form part of the growing hair fiber as it progress upward from the follicle base. These granules are round to oval in shape and are of two basic color varietiesbrown-black and yellow-red. Keratin itself is transparent and almost colorless, and it is the concentration and size of the melanin granules present in the hair that give us the complete range of hair colors present in all human hair.

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