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Hair color measurement and variation
American Journal of Physical Anthropology, 2008AbstractPigmentation of hair in humans has been investigated by medical scientists, anthropologists and, more recently, by forensic scientists. In every investigation, hair color must first be defined by the researchers. Subjective color assessment inhibits the reproducibility of experiments and the direct comparison of results.
Vaughn, Michelle +2 more
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Dermatologic Clinics, 1988
Hair color changes result not only from alterations of melanin production but also from changes in the hair structure itself, altering its optical properties. A variety of genetic, metabolic, nutritional, and acquired disorders result in hair color changes. When the underlying defect can be corrected, hair color usually returns to normal. The flag sign
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Hair color changes result not only from alterations of melanin production but also from changes in the hair structure itself, altering its optical properties. A variety of genetic, metabolic, nutritional, and acquired disorders result in hair color changes. When the underlying defect can be corrected, hair color usually returns to normal. The flag sign
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1981
Hair color in mammals ranges through shades of yellow, orange and red as well as black, gray and white. Hair color is determined mostly by the pigment granules present in the hair shaft. Two types of biogenetically related pigment are involved: eumelanins, giving dark colors, and pheomelanins, giving light colors.
J. P. Ortonne, J. Thivolet
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Hair color in mammals ranges through shades of yellow, orange and red as well as black, gray and white. Hair color is determined mostly by the pigment granules present in the hair shaft. Two types of biogenetically related pigment are involved: eumelanins, giving dark colors, and pheomelanins, giving light colors.
J. P. Ortonne, J. Thivolet
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Effect of hair color on luster
International Journal of Cosmetic Science, 2005The effect of color on instrumentally evaluated luster of hair dyed to different colors and depths of shades is studied. For natural hair colors, such as blond, brown and black, the increase in luster with increasing color is associated with a decrease in diffusely scattered light as a result of light absorption by melanin granules.
Karin, Keis +2 more
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1990
The color of hair is based on the pigment content of the hair shaft. The structure and chemical composition of the pigments are essentially under genetic control. A few genes are responsible for the broad spectrum of color which is determined by the absorption and reflection of the hair.
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The color of hair is based on the pigment content of the hair shaft. The structure and chemical composition of the pigments are essentially under genetic control. A few genes are responsible for the broad spectrum of color which is determined by the absorption and reflection of the hair.
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Fluorescence and coloration of grey hair
International Journal of Cosmetic Science, 2009SynopsisGrey hair samples were collected from 11 individuals and separated into un‐pigmented and pigmented fibres (International Hair Importers). Fluorescence measurements were obtained by using a double‐grating fluorescence spectrophotometer and a bifurcated fibre optics accessory to measure the spectra directly from the surface of hair at various ...
S, Daly +4 more
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A new oxidant for hair coloring
International Journal of Cosmetic Science, 2010J. Cosmet. Sci., 60, 205–215 (March/April 2009)SynopsisColoring hair using a level 3 permanent colorant involves two processes, lightening the underlying melanin and formation of the colored chromophores inside the hair. In typical in‐market products the oxidant used to achieve these changes is hydrogen peroxide buffered at pH 10 with an alkalizer ...
Jennifer, Marsh +4 more
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Fibers and Polymers, 2009
In this paper, detailed simulation of human hair bleaching was conducted. The materials and chemical used as well as the hair bleaching procedures were described. After bleaching, the colour change of the hair was evaluated in accordance with CIE Lab system and the hair bleaching results was analysed.
C. W. M. Yuen +3 more
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In this paper, detailed simulation of human hair bleaching was conducted. The materials and chemical used as well as the hair bleaching procedures were described. After bleaching, the colour change of the hair was evaluated in accordance with CIE Lab system and the hair bleaching results was analysed.
C. W. M. Yuen +3 more
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Hair Color, Personality, and the Observer
Psychological Reports, 1971To investigate stereotypes associated with hair color, 240 Ss completed semantic differential scales. Ss were 79 men and 161 women of differing hair colors. Results indicate that Dark Men clearly preferred Brunette Women, Blonde Men were equally divided in preference for Blondes and Brunettes.
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Genetics of Hair and Skin Color
Annual Review of Genetics, 2003▪ Abstract Differences in skin and hair color are principally genetically determined and are due to variation in the amount, type, and packaging of melanin polymers produced by melanocytes secreted into keratinocytes. Pigmentary phenotype is genetically complex and at a physiological level complicated.
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