What is the difference between pur binding and thread sewn books?

Pur binding and thread sewn books are two different methods of binding books, and they differ in terms of durability, flexibility, and cost. Here are the main differences between the two:

1. Binding Method:
- Pur Binding: Pur (Polyurethane Reactive) binding is a modern adhesive binding technique that uses a strong and flexible polyurethane adhesive to bind pages together. The adhesive is applied to the spine of the book, and the pages are then clamped together until the adhesive sets.
- Thread Sewn: Thread sewing, also known as sewn binding, involves sewing the pages together using threads. The pages are folded into sections or signatures, and these sections are sewn together using a thread, typically with multiple stitches.

2. Durability:
- Pur Binding: Pur binding provides excellent durability and strength. The polyurethane adhesive used in this method creates a strong bond that can withstand frequent use and handling. It is particularly suitable for books with a large number of pages or heavy paper.
- Thread Sewn: Thread sewn books are known for their exceptional durability. The sewing method creates a strong and flexible binding that allows the book to lay flat when opened and withstands heavy use. This method is often preferred for high-quality and long-lasting books.

3. Flexibility:
- Pur Binding: Pur binding offers good flexibility, allowing the book to open flat and stay open at any page. This makes it easier to read and write in the book.
- Thread Sewn: Thread sewn books have excellent flexibility, as the stitching allows the book to lie flat when opened. This is especially useful for books like notebooks, journals, or textbooks that require easy access to pages.

4. Cost:
- Pur Binding: Pur binding is generally more cost-effective than thread sewing. The adhesive application process is quicker and requires less labor, making it a more economical option for large print runs or budget-conscious projects.
- Thread Sewn: Thread sewing is a more labor-intensive process and requires skilled binders, which makes it more expensive compared to pur binding. It is often used for high-end or limited edition books that require a premium finish.

In summary, pur binding offers strength, flexibility, and cost-effectiveness, while thread sewn binding provides exceptional durability and flexibility at a higher cost. The choice between the two methods depends on factors such as the intended use of the book, budget, and desired aesthetic.