The main component of a perm was thioglycolic acid. It destroys the structure of the hair to give it the desired shape. When this pigment is eluted therefrom, the moisture. Hair becomes like a straw, while having a porous structure, and begin pushitsya. In addition, there is a danger to burn itself and scalp. Although manufacturers are added to compositions for a variety of permed caring substances, but they do not save much hair. In addition, they reduce the resistance of the irons.
Another disadvantage of "chemistry" is the fact that hair regrowth is becoming a significant difference between the treated area and regrown. And, of course, that such conduct can not be damaged tresses coloring.
But since 1999, the opportunity to have beautiful curls and not to cause them significant harm. Composition for biozavivki contains cystine. It is a biological protein that is structurally similar to the protein of a human hair. Therefore, we can say that biozavivka in some way serve to strengthen its structure.
But do not think that it is completely safe. Before performing the procedure must be treated hair to make them more manageable. In addition to the composition biozavivki contains components that can dry your hair and even cause allergies. Therefore, before applying the new formulations, it is recommended to do an allergy test.
Biozavivki, unlike chemicals, may be carried out on the dyed hair and even damaged. It does not cause further destruction of their structure. But that hair looked better, the hair still recommend that you treat.
"Lifetime" biozavivki the same as that of the chemical - about six months. It can be slightly extended by the use of special tools. But the major advantage is biozavivki variety of shapes that can be created with it - to create large curls, natural curls and even basal volume.