The production of paper as Papyrus sheets which were the earliest form of paper material, influenced the growth of the Egyptian civilization since it was the most important writing material in the ancient world. During those times, stones, clay tablets and animal leathers were used as a surface for writing. With the invention of Papyrus, the Egyptians were able to export it to the Roman as well as the Byzantine Empires, where it was widely used until the 7th century. Papyrus continued being used for over 3000 years. Not only the production of paper but also other Egyptian inventions such us the black ink, the calendar, the ramp, the lever, the plough, the mills among others, contributed to the growth of this civilization.