The difference between corner clipping and lattice clipping

Corn clips hurt a little more than grid clips.

In daily life, hair is regarded as an ornament. Throughout history, people have been looking for ways to curl their hair. Perm is closely related to the development of perm tools, which can be said to be the promotion of perm tools.

In 1990s, North Korea invented ceramic ironing, and then it spread to Japan, Taiwan Province Province from Japan, and finally to Chinese mainland. This is a long process, and ceramic ironing has been popular until the beginning of the 20th century.

The main component of hair is protein. Compared with other protein, protein is relatively inactive. But hair is sensitive to boiled water, acid, alkali, oxidant and reductant. Some oxidants and reductants are used in the process of perming hair and dyeing hair, all of which are acidic or alkaline chemicals. In this process, hair may also be exposed to water vapor for a long time.

Therefore, in the dyeing process, the above factors will cause damage to the hair. The surface of hair is covered with fluff. Normal hair and skin are like fish scales (or tiles), which cover the surface of hair shaft in parallel and orderly to protect the integrity of hair.

Any external stimulus will first cause hair and skin damage. In normal hair, the shape of the hair cuticle is complete and closely attached to the hair shaft, and the free edge of the hair cuticle is smooth and fish-scale. After dyeing, the fur skin of the hair is tilted upward, and there is a phenomenon of debonding, and some fur skin edges are slightly curled or serrated.