By Crystal Aguh
Written to handle the growing to be pattern of hair loss in ethnic populations, The basics of Ethnic Hair: A Dermatologist's Perspective elucidates the technology of curly hair, demystifies winning hair styling traits, and offers useful suggestion for minimizing the dangerous results of those hair styling practices. Written from a dermatologist's viewpoint, this textbook seamlessly blends technology and sensible administration. Chapters comprise actual and chemical homes of the hair, thermal and chemical straightening, extensions, razor bumps and specified cultural considerations.
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Draelos ZD. Hair care: an illustrated dermatologic handbook. London: Taylor & Francis; 2005. 19. Franca-Stefoni SA, Dario MF, Sa-Dias TC, Bedin V, de Almeida AJ, Baby AR, et al. Protein loss in human hair from combination straightening and coloring treatments. J Cosmet Dermatol. 2015;14(3):204–8. 20. Draelos ZD. Cosmetics: an overview. Curr Probl Dermatol. 1995;7(2):45–64. 21. Guerra-Tapia A, Gonzalez-Guerra E. Hair cosmetics: dyes. Actas Dermosifiliogr. 2014;105(9):833–9. 22. Gray J. Hair care and hair care products.
Primary intermediates are para-dyes such as PPD, para-toluenediamine, and para-aminophenol, which undergo oxidation to produce color [2, 13]. Hydrogen peroxide, the oxidant in this reaction, oxidizes the primary intermediates [2, 22]. Couplers (phenols, meta-aminophenols, and meta-diaminobenzenes) react with the products of oxidation to produce indo dyes, which are larger, insoluble molecules that become trapped within the cortex [2, 22]. These newly formed molecules are too large to pass through the cuticle, which is why they cannot be washed out [22].
Pierce JS, Abelmann A, Spicer LJ, Adams RE, Glynn ME, Neier K, et al. Characterization of formaldehyde exposure resulting from the use of four professional hair straightening products. J Occup Environ Hyg. 2011;8(11):686–99. 18. Beane Freeman LE, Blair A, Lubin JH, Stewart PA, Hayes RB, Hoover RN, et al. Mortality from lymphohematopoietic malignancies among workers in formaldehyde industries: the National Cancer Institute Cohort. J Natl Cancer Inst. 2009;101(10):751–61. 19. Hauptmann M, Lubin JH, Stewart PA, Hayes RB, Blair A.