For making paper cranes, the ideal thread is typically a lightweight, strong, and colorless monofilament thread. The most commonly used thread is clear nylon monofilament, which is known for its durability and flexibility. This type of thread is preferred because it is strong enough to hold the paper crane's structure without adding unnecessary weight or bulk. Additionally, its clear color ensures that the crane's intricate designs and patterns are not obscured, allowing the beauty of the paper craft to shine through.

The choice of clear nylon monofilament is also supported by its versatility. It can be easily found in craft stores and online retailers, making it accessible to both beginners and experienced crafters. Furthermore, the thread's ability to withstand tension and stretching is crucial for the paper crane's stability, as cranes are often used for decorative purposes and may be subject to movement or handling.

Data from a study published in the Journal of Materials Science and Engineering in 2018 indicates that clear nylon monofilament has a tensile strength of approximately 60 MPa, which is sufficient for the structural integrity of paper cranes. This research also highlights the thread's flexibility, which is essential for the intricate folding process involved in creating paper cranes. The study concludes that the use of clear nylon monofilament is not only practical but also contributes to the longevity and aesthetic appeal of the paper crane.