1972 Sumei was founded in Taipei, Taiwan
1976 Hones was established in Taoyuan, Taiwan
1980 Honmei was founded in Taoyuan, Taiwan
1986 Sumei, Hones and Honmei merged to become Sumei Chemical Company Limited
1991 Established Syntak Company Limited in Hong Kong
1993 Hontex (Dongguan) Chemical Company Limited was founded in Dongguan, China
1998 Sumei (Taiwan) and Hontex (Dongguan) received ISO 9002 certification
1998 Established PU product department
2003 Rayan (Dongguan) Polymer Company Limited was founded
2003 Sumei (Taiwan), Hontex (Dongguan), and Rayan (Dongguan) received ISO 9001 certification
2004 Established Flexographic Printing Plate department
2006 Sumei (Kunshan) Material Technology Co., Ltd. was founded in Shanghai, China
2008 Hones (Shatian, Dongguan) Material Technology Co., Ltd. was established in Dongguan, China
2008 Sumei (Kunshan) received ISO 9001 certification
2009 Established Sumei Chemical Company Limited headquarters in Neihu Technology Park, Taipei
2009 Hones (Shatian, Dongguan) received ISO 9001 certification
2013 Hontex (Dongguan), Rayan (Dongguan), and Hones (Shatian) received OHSAS 18001 and ISO 14001 certification
2014 Sumei Polyurethane Varnish received US UL certification
2016 Sumei Material (Vietnam) was established in Binh Duong Province, Vietnam
2018 Hones (Shatian, Dongguan) started factory expansion
2020 Sumei (Kunshan) received ISO 14001 and ISO 45001 certification