The Abbasids first used water mills in the production of this material after learning the secrets of its production from prisoners captured at the Battle of Talas.
The Aztecs received a form of this material known as āmatl as tribute. William Barrow studied decay in this material and developed a method of alkalizing this material to preserve it. In modern times, this material is produced by the Fourdrinier machine. The Abbasids first used water mills in the production of this material after learning the secrets of its production from prisoners captured at the Battle of Talas. The production of this material was said to have been developed by Cai Lun ("tsai LWUN") during the Han Dynasty, and the Song Dynasty first used it for money. For 10 points, name this material made from wood pulp, often used as a writing surface.
The Aztecs received a form of this material known as āmatl as tribute.
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