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The difference between curly hair and straight hair... (See also)

23years ago
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Among Korea, 29.6% of people have straight hair, 13.8% of curly hair, and 54% of slightly curly hair, and about 70% of the total population is known to have curly hair.

The shape of a person's hair is naturally determined by genetics, and because curly hair is dominant over straight hair, it is common to have more curly hair. However, in addition to changes in the body, such as sex hormones, there are acquired changes caused by curly hair or lack of hair growth from puberty.

Then why do hair that looks similar on the outside in a long, thin shape some curls and some straight.

The secret lies in the difference in the cross-sectional shape of curly hair and straight hair.

If you cut a strand of curly hair and look at its cross section under a microscope, it is close to a flat shape, while the cross section of straight hair is round.

It is easy to understand why the shape of the cross section is a problem if you think about the paper.

If you hold the bottom of the flat paper with your fingertips and stand it upright on your desk, you can observe that the paper bends immediately. In the case of flat-sided curly hair, it is the same as when flat paper is not upright.

On the other hand, rolling paper into a cylindrical shape makes it easy to stand upright. A hair with a round cross-section can stand straight for the same reason.

Based on this principle, cylindrical shapes are often used to make objects that should not be bent, which is why the chimney or pillar of a building is cylindrical.

Then, can I change my curly hair to straight hair.

Unfortunately, there is no way to fundamentally treat curly hair by making the shape of the hair round.

However, with the recent development of perm technology, technology that can increase curly hair such as iron or straight perm has been developed, making it possible to tidy up and easily organize swollen hair.

However, you should be careful because straightening your hair using physical and chemical methods can cause damage to your hair, and your hair has no ability to self-recovery, so once damaged, the degree of damage increases.

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