Unknotting yarn can be a delicate task but it’s entirely doable with patience and the right technique. Start by spreading the yarn out on a flat surface to identify the knots and tangled areas. Using a pair of knitting needles or a crochet hook can help gently pull at the tight spots without causing damage. It's crucial to work slowly and avoid pulling too hard, which can worsen the tangle or break the yarn. Occasionally, rolling the yarn into a ball from the opposite end can help in loosening knots. For stubborn knots, using a bit of baby powder can reduce friction and make the fibers easier to separate. Always unknot yarn in a well-lit area to better see the fine strands and their overlaps. If the yarn is particularly fine or prone to damage, consider using a blunt needle to tease apart the knots gently.

Core spun yarn is a type of yarn that combines a filament core, usually made of stronger, stretch-resistant materials like polyester or nylon, with staple fibers of cotton, wool, or other materials spun around the core. This unique structure offers enhanced durability, elasticity, and strength compared to traditional spun yarns, making core spun yarns ideal for applications requiring both the comfort and breathability of natural fibers and the resilience of synthetic ones. They are commonly used in the production of performance attire, denim, and upholstery. By balancing the benefits of different fiber types, core spun yarns provide a versatile solution for a wide range of textile products, offering improved performance without sacrificing the aesthetic or tactile qualities of the natural fibers.

PVC pipe, or Polyvinyl Chloride pipe, is a type of plastic piping commonly used in various applications such as plumbing, construction, and electrical conduit systems. It is lauded for its durability, resistance to corrosion, and easy installation. Made by polymerizing vinyl chloride, PVC pipes are lightweight yet strong, making them ideal for both underground and above-ground piping needs. They come in different sizes and strengths, indicated by their schedule rating, to suit various pressure requirements. PVC pipes are also cost-effective and have a long lifespan, reducing the need for frequent replacements. However, they are not suitable for high-temperature applications, as PVC can break down when exposed to hot water or gases.