The Fundamentals of Yarn
Yarn is a long continuous length of interlocked fibers, suitable for use in the production of Textiles, sewing, Crochet, Knitting, weaving, embroidery, or rope-making. According to Britannica, the quality and characteristics of yarn are determined by the fibers used and the method of construction. The history of yarn dates back thousands of years, evolving from hand-spun primitive threads to highly engineered industrial products.
Types of Fibers
Fibers are generally categorized into three groups: natural animal fibers, natural plant fibers, and synthetic fibers. Animal fibers include Wool from sheep, Silk from silkworms, and specialty fibers like Cashmere and Angora. Plant-based fibers include Cotton, Linen, and Hemp. Synthetic fibers, such as Polyester, Nylon, and Acrylic, are man-made polymers often designed to mimic natural properties while adding durability and resistance to shrinking.
Production and Structure
The process of creating yarn is known as Spinning. During this process, raw fibers are drawn out and twisted together to provide strength. The direction of the twist is often referred to as S-twist or Z-twist. Multiple strands of spun yarn can be twisted together to create a "ply" yarn, which increases strength and consistency. Different weights of yarn, from lace to bulky, dictate the drape and warmth of the final garment. Detailed technical specifications regarding yarn weights and ply can be found on Wikipedia.