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Information × Registration Number 0220U000638, 0119U001900 , R & D reports Title Improvement of the method of determining changes in the chemical composition of colored substances over time popup.stage_title Head Oleh Posilskyi, Registration Date 27-07-2020 Organization Scientific Research Institute of Forensic Sciences, Kyiv popup.description2 To date, a lot of documents have been researched in forensic institutions. This documents often have influence of extraneous factors not peculiar to the normal conditions of storage of documents. The work shows details the processes that occur in documents under the influence of external factors. It is noted that the external impact, depending on the duration and intensity of the action of extraneous factors, can lead to a change in the component composition of the requisites of documents, as a result, the composition of their components will not correspond to the actual time of applying these requisites. It is formulated the notion of "artificial aging of documents" on the basis of the analysis of aging processes in documents. The research work presents the arguments in favor of the need to identify signs of artificial aged while conducting some types of technical examination of documents. An approximate list of features is presented, which are practically revealed in artificially aged documents by visual, microscopic and physicochemical methods. The objective criteria of the suitability of artificially aged documents for further research during the conducting of examinations concerning the establishment of absolute time and the sequence of application of the requisites in the documents are proposed. Product Description popup.authors Артамонова Г.В. Гріненко Ж.Г. Зайцев Д.М. Звягіна О.А. Ковальчук Л.І. popup.nrat_date 2021-03-17 Close