Perm is a kind of hairdressing method, which can be divided into physical perm and chemical perm. Nowadays, chemical perm is the most commonly used. There are actually two purposes of perm: to make hair richer (with curling effect); Change the shape and direction of hair (curling is not very effective). The basic process of perm is divided into two steps. The first step is to break the sulfur bond and hydrogen bond in hair through chemical reaction. Step 2, arrange the stable hair core structure.
Extended data
Curly hair retention after perm
1. After perming, you should supplement some hair care products containing protein and moisture, and you can choose some shampoo, conditioner and essence to supplement nutrition. It is also a good choice to make nursing baking oil.
2. In order to maintain the luster and vitality of perm, it is not advisable to comb hard on the day of perm, so as not to destroy some hair-fixing structures that have not been fully finalized and make the new perm hairstyle out of shape.
3. Please try to avoid using curling iron and electric soldering iron within 3 days after perm, and try not to wash your hair, which will help to keep the perm beautiful for a long time.
4. The correct combing method after perm is to comb the knotted hair with a wide tooth comb first to avoid pulling hard. It's best not to use plastic combs, because plastic combs will generate a lot of static electricity.
Perm doesn't need to be washed every day. Don't rub your hair hard when washing your hair, it will easily damage your hair. Try to let your hair dry naturally after shampooing. Don't use a high-temperature hair dryer, it's better to use a big hair dryer to make the perm fluffy without messing up your hair.
6. After washing your hair or arranging your hairstyle, use hair styling products to enhance the strength of curly hair. Don't move the curly hair after it is dried. The less you touch it, the more natural it looks.
7. When your hair is still wet, make curly hair the way you want. When applying hair gel, you can wrap your hair around your fingers, so that the traces of your hair will look beautiful and small.
Refer to Perm- Baidu encyclopedia