Patent ID: 6692776
Filing Date: 2004-02-17
Classification: A45D,A61K,A61Q,C07D,Y10S

Abstract:
A method of nourishing hair shafts, each hair shaft comprising a cuticle layer and a cortex enclosed in the cuticle layer, said method comprising the steps of:hydrating hair shafts to open flaps of the cuticle layer; applying to the hair shafts an amino acid salt for hair nourishment having a molecular size smaller than the gaps between the flaps, wherein said amino acid salt is present in the openings between the flaps; and then compressing the hair shafts under heat by sandwiching the hair shafts between plates heated to above a boiling point to generate steam between the plates and simultaneously to press the flaps of the cuticle layer whereby the amino acid salt penetrates through the cuticle layer and is confined inside the hair shafts, and wherein said amino acid salt is sodium de-pyrrolidonecarboxylate.