 ICI licensed the product to various throwsters.The largest producer by far was William Tatton of Leek, and the Golbourne factory was at one time capable of taking the entire output of ICI's Wilton production of Terylene.Although it was highly profitable in the 1960s, the market collapsed in the 1970s, with ICI taking control of Tattons and Qualitex to form Intex Yarns.