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Polyester sewing thread
Our Fil Au Chinois all purpose sewing thread is a made of polyester. For those who wish to know what they are using, polyester is a plastic material obtained by chemical synthesis. It was patented by two English chemists, Rex Whinfield and James Tennant Dickson, in 1941, but the product was made public in 1946 due to wartime secrecy restrictions. Each country developped their own version, thus in the UK ICI produced Terylene, Dupont produced Dacron in the USA and Rhone-Poulenc brought out the French version, Tergal.