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Hair clippers are made up of a pair of sharpened comb-like blades in close contact, one above the other, and the sides which slide sideways relative to each other, a mechanism which may be manual or electrical to make the blades oscillate from side to side, and a handle. The clipper is moved so that hair is positioned between the teeth of the ...
Early hair tongs. A hair iron is a tool used to change the structure of the hair with the help of heat. There are three general kinds: curling tongs, also known as curling irons, [2] used to make the hair curly; straighteners, also known as flat irons, [3] used to straighten the hair; and crimpers, [4] used to create small crimps in the hair.
Human scalp hair grows on average about one eighth inch per week or one half inch per month. [35] Most clipper guards are numbered in eighths of an inch. The number of the guard denotes the number of weeks of hair growth left on the scalp when a clipper with a certain numbered guard is guided over the head with the guard in contact with the scalp.
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Wahl Clipper Corporation was founded due to Leo J. Wahl's patent for an electromagnetic hair clipper in 1919. [3] On February 2, 1921, he purchased a majority of the stock of his uncle's manufacturing company which made the clipper, and incorporated the business as Wahl Clipper Corporation. [4] In 1924, Leo Wahl patented a vibrating motor hair ...
The advantage of "motor" type clippers is that they provide a positive power stroke in both directions of cutting (as the blade moves back and forth); The other type of clipper motor is the "vibrator type" clipper which, instead of having a rotating armetured motor, has a magnetic vibrating strip that pulls the blade to one side, and, as the AC ...
Radiation induces hair loss through damage to hair follicle stem cell progenitors and alteration of keratin expression. [72] [73] Radiation therapy has been associated with increased mucin production in hair follicles. [74] Studies have suggested electromagnetic radiation as a therapeutic growth stimulant in alopecia. [75]