Dataset title: Investigating diversity in polymer-based identity cards using ATR-FTIR spectroscopy and chemometrics DOI: 10.25917/5f3a028d3d388 Date of dataset collection: 2017-2019 Date of dataset publication: August 2020 Keywords: Forensic science, questioned documents, infrared spectroscopy, chemometrics Primary dataset contact: Lewis, Simon W. S.Lewis@curtin.edu.au If necessary, further information or contact details may be found by emailing researchdata@curtin.edu.au +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ DATA INFORMATION Data description: This dataset was collected by Jasmine McGann and Meg Willans at Curtin University and the Australian Synchrotron, Clayton, Victoria in 2017-2019. Plastic identity cards were analysed by ATR-FTIR spectroscopy, with chemometric analysis carried out to investigate variations in their chemical composition. Specific structural and chemical differences were further investigated using high-resolution infrared imaging at the IRM beamline, Australian Synchrotron, Clayton, Victoria. Number of files & types: 208 raw spectra files (SPA format), 1 Excel file containing pre-processed spectral data, 1 Unscrambler X file containing data analysis Special software required to open files: Chemometric analysis was carried out using Unscrambler X v11 Geographic information (if relevant): Western Australia +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ REUSE INFORMATION Recommended citation: **McGann, J. et al. (2020). Investigating diversity in polymer-based identity cards using ATR-FTIR spectroscopy and chemometrics. Curtin University. DOI: 10.25917/5f3a028d3d388 This dataset is provided under a Creative Commons Attribution License. More details can be found at More details can be found at https://creativecommons.org/licenses/by/4.0/