What did the ancient Egyptians use to slice books?

Papyrus was first used around 4000 BC, and later it became one of the main export products of Egypt. The manufacture of papyrus is monopolized by the state, and its production technology is a strictly protected secret.

Ordinary paper is usually made of mashed plant fibers, but papyrus paper is different. It is made from the stem of sedge. First cut the stem into thin strips and soak it in water for three days until it becomes bright and transparent.