A hair straightener is an electrical styling tool used to smooth and straighten hair by applying controlled heat through two heated plates. When a section of hair is clamped between the plates, the heat breaks temporary hydrogen bonds in the hair structure, allowing it to be reshaped into a straighter form as it cools.
Most hair straighteners offer adjustable temperature settings so users can choose lower heat for fine or damaged hair and higher heat for thick or coarse hair. The plates are usually made of ceramic, titanium, or tourmaline-coated materials, which help distribute heat evenly and reduce frizz or heat damage.
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