What paper did the ancients use to copy the original calligraphy?

In ancient books handed down from ancient times, it is difficult to see paper manuscripts before the Tang Dynasty. The earlier paper manuscripts were Buddhist scriptures written and engraved in the Tang Dynasty. It is also common for Tang people to write scriptures with Tibetan scripture paper. The colors of the paper are yellow and brown, just like brown. Slightly cotton, thick and hard, opaque. This kind of paper is mostly used in Buddhist scriptures and Taoist scriptures written by Tang people, as well as Buddhist scriptures and Tibetan scriptures engraved in Song, Yuan and Ming Dynasties. This may be the origin of the name of Tibetan scripture paper. Books used for printing are rare in biographies.