At the beginning of 1970's, our dyeing technician, under the guidance of a professor of a textile dyeing university developed the dyeing method for raw human hair as the first dyeing technician in Korea.

And he had been upgrading the technology while working for processing & dyeing raw human hair (over 6,000 tons) of Korean human hair products factories exporting to the world before before he joined John Korea's Training course as a trainer in 2001.

Between 1980 ~ 1990, more than 80% of hair products in the world market were produced in Korea.
1985, 95% of hair products sold in Japan were made in Korea; 85% of hair products in USA were made in Korea.)
There were 7 Korean hair procressing & coloring factories in 1980's that processed raw human hair for Korean human hair product factories.