For the measurements of the tsakalis, a special sample holder was developed to examine the sensitive manuscripts with the X-ray beam. The SAXS measurements provide information about the paper structure on the nanometer scale, in particular about the size distribution of the cellulose fibers and their orientation. This information will allow drawing conclusions about the manufacturing process of the paper used for the tsakalis, and, in the best case, answer the question of whether all tsakalis were manufactured at the same time and place. The WAXS measurements taken at the same time will provide information about the pigments that are used for the drawings and texts on the manuscript, similar to the powder diffraction measurements on the clay tablets.
In addition, various types of paper from different regions and centuries will be studied with these methods to create a long-term database with the measured X-ray scattering profiles and their known information (production period, provenance, production method, et cetera). Machine learning should then make it possible to quickly assign manuscripts of unknown origin to a region and a production period.
This interdisciplinary collaboration between DESY and UWA will not be limited to individual measurements and projects. Their first joint success was the development of a molecular computer tomography for measuring Mesopotamian clay tablets, and now the measurements will follow from PETRA III. This collaboration aims to jointly improve the methods for examining a wide variety of written artefacts in such a way that the knowledge gained from the data at the molecular level leads to faster and better answers to many questions, for example how and where paper documents such as the tsakalis were once produced.