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Conk hairstyle. The conk was a hairstyle popular among African-American men from the 1920s up to the early-to-mid 1960s. [1] This hairstyle called for a man with naturally "kinky" hair to have it chemically straightened using a relaxer called congolene, an initially homemade hair straightener gel made from the extremely corrosive chemical lye which was often mixed with eggs and potatoes.
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 .
Perming hair with the sodium thioglycolate method takes only 15–30 minutes of exposure to the sodium thioglycolate solution before a neutralizer solution is applied to bring the pH back to normal and re-bond the hair. The permanent relaxer straightens the hair instead of curling it. The same chemical methods can be used for this, but the hair ...
Postmenopausal Black women who reported using hair relaxers more than twice a year or for more than five years had a greater than 50% increased risk of uterine cancer. ... Black and Latina women ...
Removing the chemical from hair relaxers has been a long-standing goal for advocates. A wide range of studies have linked formaldehyde to certain cancers, including uterine cancer and blood cancer .
The original hair type chart, also known as the hair typing system, was created by Andre Walker, Oprah Winfrey's hairstylist, in the 1990s. He debuted the system on Winfrey's show to promote his ...
The Rio Hair Naturalizer System was a hair relaxer distributed by the World Rio Corporation Inc. It was available in two types; "Neutral", and one that claimed to have a "Color Enhancement Formula" that contained a black hair dye. [1] As a product designed for home use, it was promoted through infomercials in the early to mid-1990s.
[1] [2] The company produced Ultra Wave, a hair relaxer aimed at men that George developed while at Fuller Products, an African American cosmetics company. [1] [3] The product was sold in Chicago, Harlem and other African American neighborhoods of New York City to barbers. [3] Joan repositioned the product in 1957 as Ultra Sheen and marketed it ...