Today when I was visiting the marketplace for some new pots, I came across a merchant selling these odd, a bit fabric-like white sheets. He told me that the Egyptians make these from reeds to write on them.
Personally, I don’t see a need for such a material. Just use a clay tablet like a normal person!
When you light papyrus on fire, it turns into ash. When you light a clay tablet on fire, it becomes stronger than before.