TPI (twists per inch or turns per inch) is a term used in the textile industry. It measures how much twist a yarn has,[1] and can be calculated by counting the number of twists in an inch of yarn.[2]
- ^ Kadolph, Sara J., ed.: Textiles, 10th edition, Pearson/Prentice-Hall, 2007, ISBN 0-13-118769-4, p. 197
- ^ Berka, Amanda (Winter 2007), "Technically Speaking: Twists Per Inch" (PDF), SpinOff, Interweave, pp. 11–12