Synthetic Threads
As the 1960s progressed, the development of synthetic threads became an important part of the English Sewing Ltd business. In 1966, the following synthetic brands were listed as products of the thread division: Polyfil, Trylko, Terral, Delta, Star By 1972, synthetic threads accounted for 50% of the company's industrial sales. Polyfil thread was processed at the Belper mill: "The first industrial thread to be produced by spinning cotton round a synthetic core to produce strength and sewability." In 1972, the Trylko product was renewed using more up to date production methods. Terylene fibre was spun into yarn at the Pendlebury mill. The fibre was then taken to Neilston to be twisted and wound. Finally, it was dyed, finished and spooled at Skipton. Star was a spun polyester thread that was stronger than Trylko but as fine as Sylko 50. In 1982, Sylko Supreme was introduced. This was a cotton covered polyester thread with a mercerised finish. https://www.etsy.com/uk/shop/