Samuel Grimes wrote:

nearly all paper manuscripts were written in Pracalit.

lists the following manuscript materials:

bhūrjapattra, nilapattra, palm leaf, paper roll, tamsuk, thyāsaphu

1) Would most manuscripts written in these other materials also be in Pracalit?

2) What are the materials tamsuk and thyāsaphu . When I look online it lists tamsuk as a "landgrant manuscript" not a material.

Harry Spier