Document Detail

Fading of artificial hair color and its prevention by photofilters.
MedLine Citation:
PMID:  16538296     Owner:  NLM     Status:  MEDLINE    
Fading of artificial hair color has been investigated by simulating actual usage conditions through exposure to artificial radiation in a weatherometer, with 0.35 mW/(m(2) nm) at 340 nm, for 16 to 48 hours, and by periodical washing. Hair color was produced by using commercial two-part, permanent hair dyes with light auburn, medium auburn, and dark auburn shades. Formulations based on red couplers, such as 4-amino-2-hydroxytoluene and 1-naphtol, as well as primary intermediates, such as 1-hydroxyethyl-4,5-diamino pyrazole sulfate, were employed. Results indicate that the extent of fading, as measured by the total color change parameter, dE, is greatest for colored hair subjected to both irradiation and shampooing, and significantly smaller for hair undergoing only irradiation or washing. Color loss has been also found to be dependent upon the hair type employed, with colored natural white and bleached hair undergoing much greater change than colored brown hair. It has been also shown that hair color based on pyrazole intermediates displayed the deepest fading as a result of shampooing (dE approximately 4-6 after ten shampooings) and irradiation/shampooing (dE approximately 14-16 after 32 hours of light exposure and four shampooings). The contribution of UV light (UVB + UVA) to the artificial hair-color loss was found experimentally to be dependent upon the irradiation dose and varied from 63% at 16 hours of irradiation time to 27% at 48 hours of light exposure. The theoretical extent of photoprotection by a formulation was assessed by calculating the percentage of UV light it attenuates in the wavelength range from 290 nm to 400 nm. The results indicate that UVB photofilters, such as octyl methoxy cinnamate, absorb less than 25% of the total UV irradiation at concentrations as high as 30 mg/(g hair). UVA absorbers were found to be more effective, with benzophenone-3 and benzophenone-4 absorbing about 40% of UV at the same concentration. Corresponding experimental data were in reasonable agreement with the theoretical predictions. The data are also presented for color protection with treatments containing two photo-absorbers: benzophenone-3-ZnO; benzophenone-4-ZnO; octyl methoxy cinnamate-ZnO; and dimethylpabaimidopropyl laurdimonium tosylate-benzophenone-3.
B Locke; J Jachowicz
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of cosmetic science     Volume:  56     ISSN:  1525-7886     ISO Abbreviation:  J Cosmet Sci     Publication Date:    2005 Nov-Dec
Date Detail:
Created Date:  2006-03-15     Completed Date:  2006-04-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9814276     Medline TA:  J Cosmet Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  407-25     Citation Subset:  IM    
International Specialty Products, Wayne, NJ 07470, USA.
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MeSH Terms
Benzophenones / pharmacology
Cinnamates / pharmacology
Hair / radiation effects*
Hair Dyes / chemistry*,  radiation effects*
Sunscreening Agents / pharmacology*
Ultraviolet Rays
Zinc Oxide / pharmacology
Reg. No./Substance:
0/Benzophenones; 0/Cinnamates; 0/Hair Dyes; 0/Sunscreening Agents; 119-61-9/benzophenone; 1314-13-2/Zinc Oxide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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