Materials & Techniques
The process of twisting two or more single yarns or spun threads together to create a thicker yarn. If the yarn is composed of two singles twisted together, it is said to be 2-ply; if three singles, 3-ply, and so on. The twist direction of plying is often opposite to the twist direction of the single spun threads in order to enhance the tensile strength.
Ann Rowe, “Technical Glossary for Textiles,” in Andean Art at Dumbarton Oaks, edited by Elizabeth Hill Boone (Washington D.C.: Dumbarton Oaks, 1996): 467-469.