The present invention relates to a method for using a functional filtrate having excellent far-infrared ray radiation functions and anion release functions as a perm solvent for a wig. The purpose of the present invention is to provide a method for permanently converting the various properties of hairs from various people forming a wig into uniform properties, the method comprising the steps of: obtaining fine mixed powder by pulverizing natural mineral powder in a fine particle size, in which barley stone, illite-mica, and tourmaline are mixed at a particular rate； obtaining a dispersed solution in which organic acid and a dispersing agent or a surfactant are mixed； obtaining a functional filtrate having far-infrared ray and anion activity by agitating and dissolving the mixed powder in the dispersed solution at an appropriate rate in order to be filtered； and dissolving perm agent raw materials in the perm agent dissolved water. Accordingly, the functional filtrate rarely damages the human hairs for a wig and does not leave a residual smell after being used. In the present invention, the processing means improves workability and productivity for producing wigs, eventually reduces costs for producing wigs, and produces high quality wigs. When the technique of the present invention is applied, the functional filtrate rarely damages the human hairs for a wig and does not leave a residual smell after being used. Also, the various properties of hairs from various people forming a wig can be permanently converted into uniform properties.본원은 가발용 펌 용제로 원적외선 방사 기능과 음이온 방출 기능이 우수한 기능성 여액를 얻어 이용하고자 하는 기술사상으로, 맥반석(麥飯石, barley stone)과, 일라이트-운모(illite-mica)와 토르마린(tourmaline)이 특정 비율로 혼합된 천연광물 분말을 미립도로 분쇄하여 미세 혼합분말을 얻는 단계와 유기산과 분산제 또는 계면활성제가 혼합된 분산용액을 얻는 단계와 상기 분산용액에 혼합분말을 적정범위로 넣고 교반 및 용해한 뒤 여과하여 원적외선 및 음이온 활성을 갖는 기능성 여액을 얻고, 상기 펌제 용해수에 펌제 원료를 용해시켜 이용하므로 가발용 인모의 손상이 적고, 사용 후 잔존 냄새가 없으며, 다양한 사람의 인모로부터 이루어진 가발의 특성에 따르는 다양한 모발의 특성을 균일한 특성으로 영구적으로 변화시키는 방법을 제공하고자 목적을 갖는 발명이다.본원에서는
