keratin straightener
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Common plate widths include 1", 1 1/4" and 1 1/2".
Heat-up times commonly fall in the 30–60 second range; some tools list 30 seconds while others list 60 seconds.
Kits commonly include a preparatory shampoo (pre-treatment), the smoothing/straightening treatment or mask, and aftercare items such as a daily treatment spray or a post-treatment shampoo and conditioner.
Typical aftercare guidance is to wait and wash hair the next day, use a daily treatment spray before each restyle, and use the supplied post-treatment shampoo and conditioner to help lock in the finish.
Many tools list titanium or titanium-coated plates; some also use ceramic heating elements or keratin-infused ceramic plates. Tool housings are often made of plastic.
Maximum temperatures are often up to 450°F. Adjustable ranges shown include about 320–450°F and 250–450°F, and models offer multiple heat-setting counts (for example, 5–11 settings).
Kits list result durations such as up to 3 months (about 12 weeks).