A coil of yarn is commonly referred to as a skein. Skeins are essentially long, loosely-coiled lengths of yarn that are easy to use for knitting, crocheting, and other crafts. They can vary greatly in weight and yardage, depending on the type and thickness of the yarn. Skeins are preferred by many crafters as they can be used directly without needing to be wound, although sometimes crafters choose to wind them into balls for ease of use. The choice between using a skein as is or winding it into a ball often depends on the personal preference of the crafter and the specifics of the project at hand.

Linear Low Density Polyethylene (LLDPE) and Low Density Polyethylene (LDPE) are both types of polyethylene, but with different properties due to their respective production processes. LDPE is made under high pressure resulting in highly branched polymer chains, giving it less strength but more flexibility compared to LLDPE. On the other hand, LLDPE is produced at lower pressures and temperatures, using a catalyst that allows the polymer chains to be more linear with short branches, resulting in higher tensile strength and puncture resistance. LLDPE also has better environmental stress crack resistance than LDPE. However, LDPE is easier to process due to its lower melting point. The choice between them depends on the application requirements, such as strength, flexibility, and processing ease.

Titanium dioxide is generally considered safe, but it can have various side effects based on its intake method or amount. If inhaled, it can cause respiratory problems such as coughing and shortness of breath. It can also irritate the skin and eyes on contact or cause digestive issues when consumed in large quantities. Chronic exposure to titanium dioxide nanoparticles may even pose a risk of cancer, as classified by the International Agency for Research on Cancer (IARC). Therefore, it is recommended to avoid excessive exposure or use under rigorous conditions.