| 摘要 |
FIELD: printed important documents. ^ SUBSTANCE: important document has at least one authenticity sign, which is made using luminescent substance on basis of crystalline latticework of base. Crystalline latticework of base is alloyed with at least one chromophore with electronic configuration (3d)2. ^ EFFECT: increased level of protection of important document from forgery. ^ 7 cl, 3 dwg, 3 ex |
