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Information × Registration Number 0122U200204, ( 0225U002758  ) R & D request Title Development of a methodology for establishing changes in the chemical composition of coloring substances over time when crossing details Head Posilskyi Oleh O., Кандидат хімічних наук Registration Date 12-06-2022 Organization Kyiv Research Institute of Forensic Science of the Ministry of Justice of Ukraine popup.description1 The aim of the work is a methodology for a comprehensive study of the chemical composition of colouring substances (ballpoint pen paste, stamp ink and inkjet printers) in their strokes in the presence of intersection of details in documents and to determine the ageing kinetics of the substances under study by changes in the relative content of their volatile components using the spectrum. methods of analysis, establishing signs of the influence of extraneous factors on the document, the influence of factors that led to the appearance of signs of artificial ageing of documents on the results of the study of the chemical composition of colourants. popup.nrat_date 2024-12-09 Close