Abstract: A permanent treatment method of the present invention is a method, which has been invented in order to provide a permanent treatment process, which can maintain a straightened-hair state of hair for a long time. The treatment method of the present invention is equipped with: a permeating step of adhering a permanent treatment liquid, which includes thioglycolic acid, down to a position, which is adjacent to the hair root of hair, thereby permeating the permanent treatment liquid into the hair root; and a shaping step of pulling the hair while warming the hair, which is in such a state that the permanent treatment liquid is adhered thereon, to a predetermined temperature, thereby shaping it to straight hair. In accordance with this permanent method, hair, which has extended anew since the permanent treatment, turns into straight hair.

Abstract: A hair cosmetizer of the present invention is such that the hair cosmetizer including an oily material, which is solid at ordinary temperature, is dissolved into water or is dispersed therein by compounding a water-soluble organic medium with a cosmetic material being the major component of the hair cosmetizer. And, since the water-soluble organic medium is fastened firmly to hair by means of the adhesion force of the oily material, which is solid at ordinary temperature, the water-soluble organic medium as a moisturizing material becomes less likely to be eliminated, and thereby the effects, such as gloss and moisture, sustain for a prolonged period of time.