Testex AG emerged from the "Seidentrocknungsanstalt Zürich" founded in 1846, and operates more than 20 branches[1] worldwide.

China, Hong Kong, Indonesia, Malaysia, New Zealand, the Philippines, Switzerland, South Korea and Taiwan.

[8][9] In addition to silk, the institute also started to determine the commercial weight for the Basel ribbon industry.

[8] After the end of the Second World War, the Zurich Silk Conditioning Institute managed to remain profitable by including other yarns in their testing process.

As a consequence there were personnel changes and the company shifted its focus towards textile testing outside of the silk industry, for example cotton.

[5][19] In addition, the business expanded into the Asian market, where the demand for Öko-Tex tests was high,[7] opening the first branch abroad in Hong Kong in 1995.