FTIR spectra of 11 palm-leaf manuscripts

Manuscripts Eleven palm-leaf manuscripts presumably from Indonesia, Sri Lanka, India and Myanmar were measured between 2021 and 2023: CSMC, Object No. 1/2014 CSMC, Object No. 1/2017 CSMC, Object No. 1/2018 CSMC, Object No. T 12/2021 CSMC, Object No. T 29/2021 CSMC, Object No. T 32/2021 CSMC, Object No. T 33/2021 CSMC, Object No. T 34-1/2021 CSMC, Object No. T 34-2/2021 CSMC, Object No. T add. 6/2021 Private Collection, MS Tamil 1 Spectra The spectra were recorded with the portable FTIR spectrometer 4100 ExoScan (Agilent) in DRIFTS mode.

The raw spectra are stored as .spc files together with a documentation protocol file (.pdf) on the exact measuring points. Spectra file names are structured as follows: "Date of the measurement_Name of the instrument_accessory name_no. of scans_name of the manuscript_measurement name.spc" Date of the measurement: yyyymmdd Name of the instrument: E for ExoScan accessory name: DRIFT no. of scans: 256 name of the manuscript: Object No. (see above) measurement name: "page image name_page_area_No" page image name: e.g. DSC0015 page: no. of measured page and r,v (recto, verso) area: measurement area ( leaf , ink , stain ...) No: number of measurement (on this page) Interactive visualization The " 01_InteractiveVisualisation.html " file is a standalone website that shows the individual spectra and the chemometric analysis of the data.