Permanent treatment method

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.

1 . A permanent treatment method, comprising: a permeating step of adhering a permanent treatment liquid comprising thioglycolic acid, down to a position adjacent to the hair root of hair that has been shampooed and from which a hair dressing, the oil contents, and the like, have been removed, thereby permeating the permanent treatment liquid into the hair root of the hair; 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.    
   
   
       2 . The permanent treatment method set forth in  claim 1 , further comprising, between said permeating step and said shaping step, a treatment-liquid absorbing step of sprinkling a treatment powder that adsorbs or absorbs said permanent treatment liquid, onto at least a part of said hair to transfer said permanent treatment liquid from said hair to the treatment powder, thereby stopping the shaping temporarily.  
   
   
       3 . The permanent treatment method set forth in  claim 1  wherein the concentration of said thioglycolic acid in said permanent treatment liquid is 7% by weight or less of the entirety of said permanent treatment liquid.  
   
   
       4 . The permanent treatment method set forth in  claim 1 , wherein said permanent treatment liquid further includes cysteine, and the sum of the concentration of said thioglycolic acid and the concentration of the cysteine is 7% by weight of the entirety of said permanent treatment liquid.  
   
   
       5 . The permanent treatment method set forth in  claim 2 , wherein said treatment powder is at least one member of hydrophilic organic powders and hydrophilic inorganic powders.  
   
   
       6 . The permanent treatment method set forth in  claim 1 , wherein said permeating step includes warming said hair that is in such a state that said permanent treatment liquid is adhered thereon.  
   
   
       7 . The permanent treatment method set forth in  claim 1 , wherein said permeating step includes leaving said hair that is in such a state that said permanent treatment liquid is adhered thereon for 20 minutes or more.  
   
   
       8 . The permanent treatment method set forth in  claim 1 , wherein said permeating step includes vibrating said hair that is in such a state that said permanent treatment liquid is adhered thereon, with ultrasonic vibrating means.  
   
   
       9 . The permanent treatment method set forth in  claim 1 , wherein said shaping step includes vibrating said hair that is in such a state that said permanent treatment liquid is adhered thereon, or said hair on which said treatment powder is sprinkled, with ultrasonic vibrating means.  
   
   
       10 . The permanent treatment method set forth in  claim 8 , wherein said ultrasonic vibrating means is equipped with an ultrasonic oscillator and an ultrasonic-waves absorbing plate, which is disposed to face the oscillator with a variable interval provided therebetween; and said vibrating is carried out while holding said hair that is in such a state that said permanent treatment liquid is adhered thereon, or said hair on which said treatment powder is sprinkled, between the ultrasonic oscillator and the absorbing plate.  
   
   
       11 . The permanent treatment method set forth in  claim 8 , wherein said ultrasonic vibrating means is equipped with an ultrasonic oscillator and an ultrasonic-waves reflector plate, which is disposed to face the oscillator so as to make the interval with respect to the oscillator an integer multiple of ½ of the wavelength of an ultrasonic wave, which the ultrasonic oscillator generates; and said vibrating is carried out while holding said hair that is in such a state that said permanent treatment liquid is adhered thereon, or said hair on which said treatment powder is sprinkled, between the ultrasonic oscillator and the reflector plate.  
   
   
       12 . The permanent treatment method set forth in  claim 1 , wherein said predetermined temperature in said shaping step is 100° C. or more.  
   
   
       13 . The permanent treatment set forth in  claim 1 , wherein said predetermined force in said shaping step is 0.5 kg/cm 2  or more.