The perm using chemicals was in 1906,Nessle et al. first invented the use of borax solution to immerse
Run the curled and fixed hair, then bake it with a heat pipe cover Hair, later developed into electric perm.
Until 1941, McDonought proposed，After the patent of the base cold ironing agent, the hot and cold ironing agent became popular.
Perm is a hairdressing method, divided into physical perm and chemicalPerm, the most commonly used now is chemical perm.There are actually two purposes of perming: to make the hair richer; to Change the shape and direction of the hair.The basic process of perm is divided into two steps: the first step is to pass,The chemical reaction breaks the sulfide bond and hydrogen bond in the hair; second
The first step is to reorganize and stabilize the structure of the hair core.
Classification of perm:
Spiral Perm: The small spiral coil like the telephone line has a large fluffy degree, which can increase the hair volume twice.
Firework perm: The small volume of the ultra-thin telephone line makes the hair fluffy and can increase the volume of hair by three times.
Air perm: Cut the hair into pieces before perming, and then the hair stylist will perm the fluffy curls according to your face shape. Cold burn
Horn perm: Japanese perm method, place the horn curl up or down, the effect of perm is completely different.
Hot tin foil: Use the method of manually adding tin foil to hot, and the hair volume can be doubled.
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