Yarn Grading: I commonly confer with grading specs, which contain the diameter and uniformity of yarn strands. A steady diameter gives better appearance and effectiveness of fabrics. Air covered yarn utilizes the principle of compressed air to intricately entangle and Incorporate a principal yarn using a matching yarn, usually spandex. https://deanupgvk.blog-ezine.com/31781796/not-known-details-about-covered-spandex-yarn