Watermarks assist in dating documents and determining their geographical origin.

I can also find specific examples of watermarks or fiber analysis for you.

This report analyzes the creation and material characteristics of historically significant documents, focusing on the techniques used to "produce paper" and manage the (original text) through the lens of ancient to early modern methods. 1. Production Methods of Early Writing Surfaces

Invented by Ts'ai Lun in 105 AD, true paper was manufactured by breaking down raw materials—mulberry bark, hemp, and rags—into pulp, creating a mat of cellulose fibers. 2. The Role of Originality (Texte d'Origine)