1961 Established Choyang Co.

Selling Double-side Tape Special Adhesive Tape.

1999 Start to export of solar films to East Asia, China, Europe,

South America, Canada, etc.

2001 Started production selling Inkjet Media and Interior film

Established overseas branch in Shanghai, China

2003 Renamed the company name to TOPKOS

2004 Established second factory in Kwangju

2005 Established overseas branch in LA, USA, TOPKOS USA