What thread does Xuan paper thread-bound book use?

Hemp thread In ancient times, rice paper thread-bound books used hemp thread, or a little white silk thread or white (also beige) silk thread, while modern reloaded ancient books mostly used wax white thread or nylon thread (of course, silk thread or hemp thread). Thread-bound books refer to the types of books bound with thread, also known as ancient thread-bound, which is an important invention of working people in ancient China. The ancient paper books in China experienced two stages: scroll and album.