Hairdryer , hairdryer or blow dryer is an electromechanical device that blows ambient air or hot air over wet hair to speed up the evaporation of the hair dry water. The blow dryer allows for better control of hair shapes and styles, by accelerating and controlling the formation of hydrogen bonds while in each strand. These bonds are very strong (allowing the formation of hairs stronger than sulfur bonds formed by permanent incubating products) but are temporary and highly susceptible to moisture. They disappear with a single wash of hair.
Hairstyles using blow dryers usually have volume and discipline, which can be further enhanced with hair styling products and hair combs during drying to increase tension, hold and lift.
Hairdryers were created in the late 19th century. The first model was invented by Alexander F. "Beau" Godefroy at his salon in France in 1890. Household hair dryer first appeared in 1920. Hairdryers are used in beauty salons by professional stylists and in households by consumers.
Video Hair dryer
Function
Most hair dryers consist of electric heating coils and fans (usually supported by universal motors). The heating element in most of the dryers is a bare nichrome wire naked around a mica insulator. Nichrome is used for two important properties: It is a poor conductor of electricity and does not oxidize when heated.
A store survey in 2007 showed that most hair dryers have ceramic heating elements (such as ceramic heaters), because of their "instant hot" ability. This means that it takes less time for the dryer to heat up and to dry the hair.
Many of these dryers have a "normal mode" button that turns off the heater and blows air temperature when the button is pressed. This function helps maintain hairstyles by arranging them. Colder air reduces curling and can help improve luster in hair.
Many features "ionic" operations, to reduce static electricity accumulation in the hair, although the efficacy of ionic technology is some debate. Manufacturers claim this makes hair "smoother". Some stylists consider the introduction of ionic technology to be one of the most important advances in the beauty industry.
Hairdryers are available with attachments, such as diffusers, air flow concentrators, and comb nozzles.
- Diffuser is an attachment used on hair that is smooth, colored, permed or naturally curly. It spreads the air jets, so the hair is not blown when it dries. Hair dries more slowly, at colder temperatures, and with less physical disturbance. This makes it so that the hair is not easily tangled and give more volume to the hair.
- The airflow concentrator performs the opposite of the diffuser. This makes the end of the blow dryer narrower and thus helps to concentrate the heat into one place to make it dry quickly.
- Comb comb brush is the same as airflow concentrator, but ends with comb-like teeth so users can dry their hair using a brushless dryer or comb.
Hair dryers have been cited as an effective treatment for head lice and earwax prevention.
Maps Hair dryer
Type
Today there are two main types of hair dryers: handhelds and rigid-hood dryers.
The hood dryer has a loud plastic dome covering one's head to dry his hair. The hot air is blown out through small openings around the inside of the dome so that the hair is dried evenly. Hood Dryers are mainly found in hair salons.
History
In 1890, the first hair dryer was invented by French stylist Alexander Godefroy. The invention is a large and sitting version of a hood attached to a gas stove pipe. Godefoy created it for use in his hair salon in France, and it's not portable or handheld. It can only be used by having the person sit under it.
The American inventor of Armenia Gabriel Kazanjian was the first patented hairdresser in the United States, in 1911.
Around the year 1915, hair dryers began to circulate in the market in the form of a handheld. This is due to innovations by National Stamping and Electricworks under the white cross brand, and then Universal Motor Company Racine AS and Hamilton Beach Co., which allows the dryer small enough to be held by hand. Even in the 1920s, new dryers were often heavy, weighing about 2 pounds (0.9 kg), and hard to use. They also have many examples of overheating and electrocution. Hairdryers can only use 100 watts, which increases the amount of time it takes to dry the hair (the average dryer can currently use up to 2,000 watts of heat).
Since the 1920s, the development of hair dryers is mainly focused on increasing the wattage and the exterior outside and the material changes. In fact, the dryer mechanism has not changed significantly since the beginning. One of the more important changes to a hair dryer is made of plastic, making it lighter. It was completely caught in 1960 with the introduction of better electric motors and improved plastics. Another important change occurred in 1954 when GEC changed the dryer design to move the motor into the casing.
The bonnet dryer was introduced to consumers in 1951. This type works by having a dryer, usually in a small portable box, connected to a tube that goes into a bonnet with a hole in it that can be placed over one's head. This works by providing a uniform amount of heat to the entire head at a time.
The 1950s also saw the introduction of the rigid hair dryer which is the most common type seen in salons. It has a hard plastic helmet that wraps around the person's head. This dryer works with the 1950s bonnet dryers but with a much higher wattage.
In the 1970s, the US Consumer Product Safety Commission set guidelines for hair dryers to be safe to produce. Since 1991, the CPSC has mandated that all dryers must use ground fault circuit interference so that it can not shock someone if it is wet. In 2000, deaths from blowdryers dropped to less than four people per year, a striking difference with hundreds of cases of electrical accidents during the mid-20th century.
See also
- Curling iron
- Hot gun
References
External links
- Media related to Hairdryers on Wikimedia Commons
Source of the article : Wikipedia
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