This MedLibrary.org supplementary page on Blowdryer is provided directly from the open source Wikipedia as a service to our readers. Please see the note below on authorship of this content, as well as the Wikipedia usage guidelines. To search for other content from our encyclopedia supplement, please use the form below:
Related Sponsors
 |
This article needs additional citations for verification. Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (May 2008) |
A blowdryer or hairdryer is an electromechanical device designed to blow cool or hot air over wet or damp hair, in order to accelerate the evaporation of water particles and dry the hair. Blowdryers allow to better control the shape and style of hair, by accelerating and controlling the formation of temporary hydrogen bonds inside each strand. These hydrogen bonds are very powerful (allowing for stronger hair shaping than even the sulfur bonds formed by permanent waving products), but are temporary and extremely vulnerable to humidity. They disappear with a single washing of the hair.
Hairstyles using blowdryers usually have volume and discipline, which can be further improved by the use of styling products and hairbrushes during drying to add tension, hold and lift.
Blowdryers were invented around the end of the 19th century. The first model was created by Alexandre F. Godefoy in his salon in France. The handheld, household hair-dryer first appeared in 1920.
Function
Most models use coils of wire that have a high electric resistivity and heats rapidly with an electric current. A fan usually blows ambient air past the hot coils resulting in heated air effective for drying. The heating element in most hairdryers is a bare, coiled nichrome wire that is wrapped around insulating mica heating boards. Nichrome wire is used in heating elements, because of two important properties: it is a poor conductor of electricity and it does not oxidize when heated.
A survey of stores in 2007 showed that many hair dryers have ceramic heating elements (like ceramic heaters) - because of their "instant heat" capability.
Many of these hair dryers have "cool shot" buttons which turn off the heater and just blow room temperature air while the button is pressed.
Many also feature "ionic" operation, to reduce the amount of static electricity build-up in the hair. Manufacturers also claim this makes the hair "smoother".
See also
References
 |
This tool article is a stub. You can help Wikipedia by expanding it. |
Wikipedia content modification information:
- This page was last modified on 25 December 2008, at 01:34.
Wikipedia Authorship and Review
Wikipedia content provided here is not reviewed directly by MedLibrary.org. Wikipedia content is authored by an open community of volunteers and is not produced by or in any way affiliated with MedLibrary.org.
Wikipedia Usage Guidelines
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article on "Blowdryer".
The URL for this specific entry is:
All Wikipedia text is available under the terms of the GNU Free Documentation License. (See Copyrights for details). Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc.