What is Hair iron?
[[Image:hairtong.JPG|thumb|right|Early hair tongs]] A '''hair iron''' or '''hair tong''' is something people use to change the shape of the [[hair]] by heating it. There are three types of hair iron: *'''Straightening irons''' (sometimes called '''hair irons''', '''hair straighteners''' or just '''straighteners'''), which [[Hair straightening|straighten the hair]]. *'''[[Curl]]ing tongs''' (sometimes called '''hair tongs''' or '''hair curlers''' or just '''curlers''', or less often '''curling irons'''), which make hair curly. *'''Styling irons''' (sometimes called '''hair stylers''' or just '''stylers'''), that can straighten '''and''' curl the hair. ==History== In 1872, Marcel Grateau (a [[Paris]]ian) used heated [[rod]]s to curl or style hair. In 1893, Ada Harris, a school teacher from [[Indianapolis]], applied for a patent for the hair straightener. The hair straightener was a device “heated like a curling iron” with two flat faces held together by a [[hinge]] . It was said that when the faces press the hair, it will become straight.” Harris's invention also had a comb, which would keep different parts of the hair separated. Simon E. Monroe patented a hair straightener in 1906 that was like a metal [[comb]].<ref>{{cite web|url=https://patents.google.com/patent/US819444A/en|title=Hair-straightener.|publisher=}}</ref> In 1909, Issac K. Shero patented a hair straightener made of two irons that are heated and put together around the hair.<ref>{{cite web|url=https://patents.google.com/patent/US943321A/en|title=Hair-straightener.|publisher=}}</ref> Years later, Sharrell made heated [[metal]] [[tool]]s, for example: hot combs. The hot metal straightener went easily through the hair, making less damage and dryness than the way things were done before. Later, [[ceramic]] and [[electric]]al straighteners were made, meaning people could adjust the heat settings and straightener size. Another method of hair straightening is [[Japanese hair straightening]], which was invented in Japan, and works like a [[Perm (hair