Process for molding and increase the volume of human hair.

The invention relates to a method to shape and volume to human hair, characterized by: a) an alkaline agent permanent deformation, of pH between 7.6 and 11, is applied to the hair based on a substance that reduces the keratin hair; b) the agent is allowed to act on the permanent deformation of hair for a period of 5-30 minutes at room temperature or 20 minutes at the higher temperature; c) optionally, the hair can be rinsed with water; d) the hair with an aqueous acidic intermediate treatment agent with a pH between 2 and 6.5, based on a salt, a betaine, an aliphatic organic acid and / or acid is aminoalifatico; e) optionally, the excess liquid is absorbed; f) the hair is wound on curlers; g) the hair is left to rest for a period of up to 30 minutes at room temperature or up to 20 minutes at higher temperatures; h) the hair is treated, after step e) or step g) with a fixative based on an oxidizing agent agent; i) if curlers or other molding elements are used, are removed; j) the fixing agent is rinsed with water or washed with shampoo and hair is combed to provide the desired style.