Blowdryers are used to accelerate the evaporation of water particles and dry the hair. The usage of blowdryers also allows you to better control the shape of your hair in the process of styling, by accelerating and controlling the formation of temporary hydrogen bonds inside the hair. 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, so that they entirely disappear with a single washing of the hair.
Blowdryers were invented towards the end of the 19th century, being dependent on heat generation and mechanical air flow in order to be effective. The handheld, household hair-dryer first appeared in year of 1920.
Hairstyles using blowdryers usually have discipline and volume, and can be further improved by the use of brushes during the drying process to add tension, and also the use of styling products such as hair gel, moose, and hairspray.
Before the invention of the blowdrying, hairstyles tended to be stiff and lacked in volume.
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