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Between 2010 and 2012, there was a dispute between the manufacturers and importers of Brazilian hair straightening products on one hand, and various US federal and state health agencies on the other, about the proper labeling and health warning of the products. The dispute centered about the chemical compounds formaldehyde (H
Hexion Inc. or Hexion (previously Momentive Specialty Chemicals) [2] is a chemical company based in Columbus, Ohio.It produces thermoset resins and related technologies and specialty products.
Hair straightening is a hair styling technique used since the 1890s involving the flattening and straightening of hair in order to give it a smooth, streamlined, and sleek appearance. [1] It became very popular during the 1950s among black males and females of all races.
A relaxer is a type of lotion or cream generally used by people with tight curls or very curly hair which makes hair easier to straighten by chemically "relaxing" the natural curls. The active agent is usually a strong alkali , although some formulations are based on ammonium thioglycolate or formaldehyde .
He also observed that the liquid worked on his neighbor's dog and his own hair. [20] He made the liquid into a refining cream and launched the G. A. Morgan Hair Refining Company to market it. Morgan received great success and added other products including "hair-growing" cream, black hair oil dye, and a curved-tooth comb for hair straightening ...
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The thioglycolic acid in the perm solution reduces the disulfide cystine bonds in the cortex of the hair. [2] In a sense, the thioglycolate removes crosslinks. After washing, the hair is treated with a mild solution of hydrogen peroxide, which oxidizes the cysteines back to cystine. These new chemical bonds impart the structural rigidity ...
A hot comb (also known as a straightening comb or pressing comb) is a metal comb that is used to straighten moderate or coarse hair and create a smoother hair texture. [1] A hot comb is heated and used to straighten the hair from the roots. It can be placed directly on the source of heat or it may be electrically heated. [2]
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