| 摘要 |
The invention relates to a method for producing an optically variable security element (12) comprising a microcapsule-based ink layer (36), having a motif region (14) in the form of patterns, characters or a coding. The invention also relates to the security element itself. According to the invention, . D) a printing ink which contains, in a binding agent (38), a plurality of microcapsules (40) having respectively a semi-permeable capsule cover (42) which is permeable to predetermined reactive substances, is used and a carrier liquid (44) which is closed in the capsule cover (42) and the capsule content which can be influenced by an external electric or magnetic field and which can be displaced essentially freely in the microcapsule (40), . A) the printing ink is applied to a base (32,34) in order to form a microcapsule-based ink layer (36), . R) a layer containing the predetermined reactive substances (52) which penetrate through the semi-permeable capsule covers (42) in the microcapsules (40) of the ink layer is applied to the microcapsule-based ink layer (36), in the motif region (14), . M) an external electric or magnetic field (58) is applied to a sub-area of the ink layer containing the motif region (14) in order to influence the displacable capsule content (46), and . H) the reactive substances (52) which have penetrated into the microcapsule (40) are hardened in order to fix the capsule content (46) in the microcapsule in the position in which it is influenced. |
