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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.
Sodium hydroxide is a popular strong base used in industry. Sodium hydroxide is used in the manufacture of sodium salts and detergents, pH regulation, and organic synthesis. In bulk, it is most often handled as an aqueous solution, [28] since solutions are cheaper and easier to handle.
[1] [3] By the 1960s had an estimated 80 percent of the black hair-care market and annual sales of $12.6 million by 1970. [1] In 1971, JPC went public and was the first African American owned company to trade on the American Stock Exchange. [1] [5] The company's most well-known product was Afro Sheen for natural hair when afros became popular.
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.
Sodium hydroxide creates a harder soap such as is used in pucks, where potassium hydroxide facilitates creation of a softer soap which loads on the brush more easily. [6] Historically, tallow has been a popular ingredient in shaving soaps and is still in use in some traditional products.
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