Thin Paper

[ecoli]

I have this literature anthology from english class, it's over two thousand pages long, but from the outside it doesn't look like it, because the pages are really thin. My question: What is this paper made out of and how do they get it so thin??

Thank you

[Tetrahedrite]

It is mostly cellulose fibres from tree pulp

[swansont]

Onion skin, perhaps, or something similar.