Surplus Yarn
From Tribute Text, a free reading archive edited by Tribute Brand
Surplus Yarn or Waste Yarn refers to both the yarns that are utilized behind the scenes in the knitting process that help cast on or off the main knit and/or assemble two panels, and also to the yarns that are leftover after production. Typically, there isn’t enough yardage of these yarns to utilize them for subsequent orders, so they often accumulate on factory floors or are discarded.