| 摘要 |
The invention relates to the detection of manipulation of a valuable or security product (100), for example of a valuable or security document. According to the invention core/shell particles (200) are added to the valuable or security product, the shell (210) of which particles can be damaged or destroyed by mechanical action, such that at least one first chemical substance (250) that is contained in the core/shell particles (200) is released from the core/shell particles (200). When the first chemical substance (250) is released, the first chemical substance (250) creates, alone and/or owing to a chemical interaction with at least one second chemical substance (260) situated in the surroundings of the core/shell particles (200), a visible impression. |
