Skein dyed refers to a method where yarn is loosely wound into long skeins and immersed into dyeing troughs. With the exception of olefin, this method can be used on any fibers strong enough to handle the process of winding and back-winding the skeins onto cones. Due to its slow process and high labor cost, skein dyeing is usually ideal for small quantities of custom colored yarn.
Yates, Marypaul, and Adrienne Concra. Textiles for Residential and Commercial Interiors. 2019