History
Simon Monroe patented a hair straightener in 1906 that comprised 7 metallic teeth that are combed through the hair,[1] while in 1909 Isaac K. Shero patented a hair straightener composed of two flat irons that are heated and pressed together.[2]
[edit] Types of hair irons
[edit] Curling iron
Curling irons, also known as curling tongs, create waves or curls in the hair. There are many different types of modern curling irons, which can vary by diameter, material, and shape of barrel and the type of handle. The barrel's diameter can be anywhere from .5 inches (1.3 cm) to 2 inches (5.1 cm). Smaller barrels are typically used to create spiral curls, and the largest barrels are used to give shape and volume to a hairstyle.[3]
Curling irons are typically made of Teflon, ceramic, tourmaline, metal, or titanium, each of which has its pros and cons. The barrel's shape can either be a cylinder, cone, or reverse cone, and the iron can have brush attachments or double and triple barrels.[3]
The curling iron can also have either a spring-loaded, Marcel, or clipless handle. Spring loaded handles are the most popular and use a spring to work the barrel's clamp. When using a Marcel handle, named after Marcel Grateau, one applies his or her own pressure to the clamp. Clipless wands have no clamp, and the user simply wraps hair around a rod. Most clipless curling irons come with a Kevlar glove to avoid burns.[3]
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