| 摘要 |
The invention relates to a method for increasing the counterfeit protection for an article having a latent security feature, which article contains a substrate having at least one absorbent surface having a first and a second area, wherein the first area contains printing based on a first printing scheme and optionally the second area contains printing based on a second printing scheme and the areas, if necessary, are handled on the basis of a method of handling, wherein the first area does not differ visually from the second area, which means that the security feature does not appear, wherein the first area differs from the second area such that when a liquid is put onto the areas the first area differs visually from the second area even without a chemical reaction, which means that the latent security feature appears so as to be visible to the eye and, as the evaporation of the liquid increases, the visual differences become increasingly smaller until the two areas no longer differ visually from one another, which means that the latent security feature becomes invisible again. |
