We have done tutoring classes for more than 15 years.
We are not like school teachers, but we are factory-workers, technicians with more than 20 year or 30 years of production experience.

Our chief trainer(one person) in charge of Human hair processing (coloring) has processed about 2,000,000 Kgs of H/hair for himself (with assitants for washing hair ) about more than 20,000,000 Kgs together with staff-dyeing men) since 1975 for hundreds of overseas buyers including most of major human hair wig importers, Human hair weft importers in USA, Japan, Germany, Italy, Spain, UK, etc.

Our chief trainer (male) who is in charge of Wig-making and Weft making producing & up-grading & developing Wig-making sewing machines has produced or fixed/adjusted about 40,000 sewing machines for 45 years since being 15 years old.
He and his 3 friends invented the 3 head sewing machine for the first time in the world, ( Before there were only 1 head machines through the world. Koreans had imported single head-sewing machines from Japan before their invention.
And later, he developed and up-graded all kinds of sewing machines used in wig-making such as Skin machine, High-car in your attachment. He used be a manger of one of biggest wig factory in Korea 30 years ago, and run a his own factory, and joined John Yim to train hundreds of Chinese factory people at a time as a Overseas Training Program, dozens in Bangkok, Thailand, several persons in Israel, etc ; and in Korea mainly & usually one or a few persons at a time with John Yim.

Our Weft-sewing trainer(female) above has produced more than 9 million-meters of wefts for more than 30 years which were used in making about 750,000 wigs or more than 3 million pcs of Wefts ( 113 Grams/pc or 1/4 pounds/pc).

Our Skin( Hair) Implanting trainer for herself has produced about 0.3 millions of skin parts of m/m wigs for 25 years

Our Hand-tie trainer has produced about 9,000 pcs of fine quality of hairpieces for men for about 30 years.

John Yim as the training program manager working made /supplied Wigs, Wefts, Human hairpiece in bulk/weft, Toupees, Top closures in the past, and since 1990 has been making machines, wig supplies &wig materials, chemicals, textiles (netting materials) and providing Hands-on Training courses for overseas people with all kinds of hairgoods-manufacturing techniques used in producing Wefts, Wigs, Toupees, Human hairpiece (Dyeing, Permanent Curling, Permanent Hair-conditioning), Hair Extensions, etc.

Now, Johh Korea Ltd. are suppling machines, chemicals, netting materials, accessories for about 5,000 customers in 90 countries including 21 Indian companies, 70 Chinese companies), 14 African companies, 7 Russian companies as of Jan, 2011.

All, or most of workers in wig factories in China, Korea, or the world know about limited techniques. Sewing girls know only how to sew, Hair blending girls know only hair blending, Machine engineers who assemble & repair machines do not know about wigcap materials, other kinds of machines, chemicals, etc which are related with Weft-making.
What is more, (most of cases) sewing girl of wefting machine (CW433-3H, CW432-2H, etc) can not operate (work with) other sewing machines such as posting (CW435-HP), nor Hair Implantation machine (CW440-HI). Curl-making people can not operate machines.

But, we do (can) train a person to be able to have most of techniques so that he/she can make wigs or wefts for himself/herself and fix (repair) machines.

Ladies' Machine Made Wig factory people do not know about Men's Hairpiece ( hand-tied) such as manufacturing ( processing) methods, netting materials,chemicals, tools and machines, markets.
Hand-tied Hairpiece (Toupee) factory people do not know about the processing methods of M/M Wigs, Human Hairpiece, Synthetic Hairpieces or (Jumbo) Braids, Netting Materials, their Fibers, Machines, Chemicals, etc.

We have had long & much physical & practical (1) manufacturing experience of Wigs, Toupees, Hairpieces in Synthetic fiber, and Human hair, and (2) we have been producing Machines, Chemicals, Synthetic fibers, Human pieces, Netting materials used in making above finished Hair products, And, (3) we have got information and experience about oversea markets as been exported ( mainly in the past) Wigs, Toupees, hairpieces and ( mainly past 10 years by today ) machines, chemicals, netting materials, other accessories, wig & toupee care accessories ( adhesive tapes, bonding glue) and beauty supplies.

We have touched for MORE THAN 22 YEARS most of RELEVANT CATEGORIES & FIELDS of Hair goods manufacturing for both Men and women; Machine made and Hand tie(made); H/Hair and Syn Fiber.
As HAVING BEEN DOING business, we HAVE BEEN DEVELOPING/UP-GRADING(UP-DATING) processing technologies, equipments, chemicals, tools, and other materials according to our wishes and requests of overseas buyers.

Into our Tutoring Classes, we have INTEGRATED all of our experience (manufacturing, marketing), techniques (Wigs, Toupees, Human hairpiece; Machines, chemicals, textiles), and information.
Besides, we have tried upgrade Tutoring methods ( approaches) to be easy and more efficient as the only company internationally running Tutoring Classes.