ИСТИНА

Marking of items is relevant to prevent illegal circulation of cultural heritage objects and objects of high value. Luminescent marking allows implementing a number of requirements for secrecy, uniqueness, protection against forgery. One of the requirements is related to the durability of luminescent markings in various environmental conditions. In this research we studied the influence of tropical climate and environmental factors specific to Southeast Asia on the stability of the luminescent characteristics of marking compositions deposited on various materials: metal, wood, ceramics, plastic, paper. Inorganic phosphors YAG:Ce, ZnS:Cu, ZnS:Sn:Sc and organic-inorganic hybrid materials based on 8-hydroxyquinolates: (CaF2+Liq), (Alq3+ H3BO3), (Liq+ H3BO3) and (Hq+ H3BO3) were used as luminescent components of the marking compositions. Phosphors were dispersed in isopropanol and thoroughly mixed using an ultrasonic bath. The resulting suspension was poured into a capillary felt-tip pen and drew the image on different materials The research was financially supported by the Ministry of Science and Higher Education of the Russian Federation within the FSSM-2020-0005 project.