A method for preparation and use of inorganic markers for security identification/marking in explosives, fuses and ammunition after detonation and on firearms and metal projectiles, products obtained and process of inserting markers on explosives, fuses and ammunition and on firearms and metal projectiles, comprising:
- materials with capacity to generate visible colors when excited in the infrared region, which are used to determine the origin of explosives, fuses and ammunition, even after detonation, as well as in weapons and metal projectiles, which are prepared using the solid-state reaction method, wherein the inorganic oxides are mixed according to the desired stoichiometric proportions for obtaining LaNbO4 (Mark1), BiVO4, Sr3V2O8 and YNbO4 (Mark2), doped, respectively, with rare earth ions erbium and ytterbium, holmium and ytterbium, holmium and ytterbium and thulium and ytterbium, which are mechanically inserted into explosives and ammunition and by carburizing and forging on weapons and metal projectiles.