The ancient Greeks and Romans made calfskin or sheepskin into "leather paper" as advanced writing materials. Leather paper is made by a special craftsman. Artisans first tan and soften fetal calf leather, calf leather or sheepskin, and then scrape off appendages with instruments to make the tissue surface smooth and elastic. People used to call it "parchment"

People use feathers or reed pipes as pens, dip them in ink, write on parchment, and then bind them into books. The books they read are written by hand. If someone wants a book, they must copy it. At that time, all rich families had slaves who copied books.