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All about hair rollers curlers

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Three hair rollers of different diameters

A hair roller or hair curler is a small tube that is rolled into a person's hair in order to curl it, making a new hairstyle.

The diameter of a roller varies from approximately 0.8 inches (20 mm) to 1.5 inches (38 mm). The hair is heated, and the rollers strain and break the hydrogen bonds of each hair's cortex, which causes the hair to curl. The hydrogen bonds reform after the hair is moistened.

A hot roller or hot curler is designed to be heated in an electric chamber before one rolls it into the hair. Alternatively, a hair dryer heats the hair after the rolls are in place. Hair spray can temporarily fix curled hair in place.

In 1966, Panasonic produced the first electrically-heated hair rollers, and released them in Japan.

Velcro hair roller
A Velcro hair roller is made of a strip of hook and loop fasteners that is wrapped around cylinders. They are available in different sizes and can be used on dry or wet hair. The rollers are self-holding because they do not need pins or clips to be held in place. But they are not considered sanitary and are not permitted by the state board in some states.

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