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A lye relaxer consists of sodium hydroxide (also known as NaOH or lye) mixed with water, petroleum jelly, mineral oil, and emulsifiers to create a creamy consistency. On application, the caustic "lye cream" permeates the protein structure of the hair and weakens its internal bonds, causing the natural curls to loosen out as the entire fiber ...
Lye relaxers contain sodium hydroxide, while non-lye relaxers contain calcium hydroxide and can be used on more sensitive scalps. Comparison of the permanent hair straightening treatments: Keratin/Brazilian treatment
Hair relaxers have seen a considerable resurgence in popularity among the Black hair community. ... including lye and no-lye versions, and their origins can be traced back to the early 1900s ...
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.
January 24, 1995 an investigator with FDA's San Francisco district office went to Addressing and Mailing to inspect the firm and found more than 8,000 cases of the Rio hair relaxers, worth about $500,000 in retail value. FDA notified the State of Nevada Division of Health, which, in turn, embargoed the products, thus preventing their sale.
Lye is a hydroxide, either sodium hydroxide or potassium hydroxide. The word lye most accurately refers to sodium hydroxide (NaOH), [ citation needed ] but historically has been conflated to include other alkali materials, most notably potassium hydroxide (KOH).