One of the most persistent frustrations with flat iron curling is the sharp horizontal line, colloquially called a clamp dent, left on the hair where the plates first made contact. This happens when the wrist pauses right after closing the iron, or when the straightener features squared plate corners that press a hard ninety-degree angle into hot hair. Tools built with truly beveled, rounded outer shells allow strands to wrap around the casing smoothly without hitting a blunt corner.
To prevent hair creasing, begin the downward gliding motion a split-second before you finish clamping down completely. This moving start distributes the initial clamp pressure along an angled curve rather than a stationary line. Additionally, ensure the hair is thoroughly detangled with a boar-bristle brush before the iron touches it. Any small tangle caught between hot plates becomes an anchor point that halts the glide, burns the cuticle, and imprints an unsightly kink into the curl.
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