The strength of PVC pipes is determined by their schedule, which indicates the thickness of the pipe walls. Schedule 80 PVC pipes are considered the strongest commonly available, as they have thicker walls compared to Schedule 40 PVC pipes, thus offering higher pressure handling capabilities and durability. However, it's essential to select the type based on application needs; Schedule 40 is often sufficient for many residential uses, while Schedule 80 is preferred for industrial settings where higher pressure or more robust handling is required. Always consult relevant building codes and standards when selecting PVC pipes for specific applications.

Polyethylene (PE) and polypropylene (PP) are both common plastics with diverse applications, from packaging to automotive parts. Generally, PE tends to be less expensive than PP. This price difference can be attributed to PE's simpler polymerization process and the fact that it is produced in larger quantities worldwide, which scales down its cost. However, prices can fluctuate based on market demand, oil prices (as both are petroleum-derived products), and the specific type or grade of the polymer. Polyethylene is preferred for its flexibility and durability, making it ideal for products like plastic bags and containers. Polypropylene, while slightly more costly, offers higher melting points, making it suitable for applications requiring resistance to heat, such as microwaveable containers. Ultimately, the choice between the two materials depends on the intended application's specific requirements and the budget constraints of the project.

Handspun yarn, with its unique texture and thickness, is ideal for projects that highlight its individuality. Consider using it for small, special items such as hats, scarves, or mittens, where its distinctive qualities can truly shine. Alternatively, handspun yarn can be incorporated into larger projects like blankets or shawls, either as an accent or as the main material, providing a rustic and cozy feel. Given the variation in thickness and texture, gauge swatches are crucial to ensure the end product meets expectations. For crafters who enjoy dyeing, handspun yarn presents a perfect canvas for experimenting with natural or synthetic dyes, offering further customization. As it may come in limited quantities, planning projects around the available yarn amount is essential. Knitting or crocheting with handspun yarn not only results in a personalized and unique item but also supports the tradition of spinning and encourages the continued craft of yarn making.