A special pre-straightening shampoo that prepares the hair for the straightening process, the shampoo cleanses residual fat and silicone and raises the pH level of the hair to 2.pH9 so that the straightener penetrates optimally into the hair structure.
The hair should be washed with the shampoo in preparation for applying the straightener.
Sold for professional use only. Read the instructions before use.
The bottle contains a liter of shampoo, you can order a 150 ml powder for a trial.

User manual:

First the hair should be washed with water, then take an appropriate amount of the developed shampoo before straightening Indian oil and rinse the hair well twice, the hair should be dried before applying the straightening treatment.

Warning : Do not use the product if sensitivity to one of the ingredients is known, use the cosmetic only for the purpose for which it is intended and in accordance with the instructions for use. Do not swallow. Eye contact should be avoided and in case of such contact rinse thoroughly with water. Keep away from children. Store in a cool place, below 30 degrees.