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Hair iron

technology Maturity 11-13 Next article →

A hair iron is a tool used to change hair.

Brennschere, Brennzange
Brennschere, Brennzange

These tools use heat to change how hair looks. There are three main kinds of irons. Curling irons make waves or curls. Straightening irons make hair flat. Crimping irons create a sawtooth pattern. Using these tools too much can cause hair damage.

Curling iron unbranded
Curling iron unbranded

Curling irons work using a part called a barrel. The barrel can be a cylinder or a cone shape. Many barrels use a spring-loaded handle to clamp the hair. Some irons are clipless wands with no clamp. For these, you wrap hair around a rod. People often use a Kevlar glove to avoid burns. Smaller barrels make tight ringlets. Larger barrels give hair more volume.

Marcel 12 curling iron 1920s
Marcel 12 curling iron 1920s

Straightening irons use heat to change the hair's shape. Inside the hair is a part called the cortex. This part has positive hydrogen bonds. These bonds cause hair to bend or curl. Heat breaks these bonds so hair stays straight. If the hair gets wet, the bonds re-form. Most straighteners use ceramic plates for this work. High-end models use many layers of ceramic.

Curling iron unbranded
Curling iron unbranded

People have used many tools for hair over time. In the 1870s, Marcel Grateau used heated metal combs. Madame C.J. Walker used wide combs and special lotions. Her mentor, Annie Malone, may have patented the hot comb. In 1909, Isaac K. Shero patented a flat iron. This tool used two heated metal plates. In 2013, someone patented a ceramic straightening brush. Sharon Rabi released the Dafni brand in 2015.

Marcel 12 curling iron 1920s
Marcel 12 curling iron 1920s

Different irons create very different looks for the hair. Crimping irons use ridges on the paddles to work. Large ridges make big crimps in the hair. Small ridges make tiny crimps. This look is like the marks from small braids. Crimped hair was very popular in the 1980s and 1990s. Most modern tools use electricity to create heat. Some cordless tools use butane or batteries. Batteries can last up to 30 minutes.

Curling iron unbranded
Curling iron unbranded
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File:Brennschere, Brennzange.jpg
Brennschere, Brennzange.jpg
File:Curling iron unbranded.jpg
Curling iron unbranded.jpg
File:Marcel 12 curling iron 1920s.jpg
Marcel 12 curling iron 1920s.jpg
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