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The chemical solution used in the perming process is determined by the client's hair type and the pH of the solution. Classic alkaline perms are used for stronger, coarser hair. They work at room temperature and usually contain ammonium thioglycolate in the pH range of 9-10. Acid perms are used on more delicate or thinner hair.
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.
Hair damage can be further exacerbated by the use of chemical products used for chemical straightening. The study's findings support recommendations to wear looser hairstyles and avoid keeping braids and extensions for more than a few months. [61] Certain products (hair dyes, hairsprays, bleaches, etc.) may contain allergenic ingredients.
The US Food and Drug Administration is planning to propose a ban on certain hair-straightening products, such as chemical relaxers and pressing products, that have been linked to health risks.
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.
The scalp can suffer severe chemical burns if over exposed to lye or no-lye relaxers. 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 ...
The Chemical Abstracts Service (CAS) [13] lists formaldehyde (50-00-0 [14]) and methylene glycol (463-57-0 [15]) as two different substances. The compounds have two different chemical structures, exist in two different chemical families and exhibit different physical properties. Formaldehyde is a colorless gas with chemical structure HCHO.
Garrett Augustus Morgan Sr. (March 4, 1877 – July 27, 1963) was an American inventor, businessman, and community leader.His most notable inventions were a type of three-way traffic light, [1] and a protective 'smoke hood' [2] notably used in a 1916 tunnel construction disaster rescue.
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