Do you know Bhojpatra ???

Betula utilis (Himalayan birch, (भोजपत्र)) is a birch tree native to the Himalayas, growing at elevations up to 4,500 m (14,800 ft). The specific epithet, utilis, refers to the many uses of the different parts of the tree
The bark of Himalayan birch was used centuries ago in India as paper for writing lengthy scriptures and texts in Sanskrit and other scripts, particularly in historical Kashmir. Its use as paper for books is mentioned by early Sanskrit writers Kalidasa (c. 4th century CE), Sushruta (c. 3rd century CE), and Varahamihira (6th century CE). In the late 19th century, Kashmiri pandits reported all of their books were written on Himalayan birch bark until Akbar introduced paper in the 16th century.