| 摘要 |
The invention relates to an anti-theft ink for marking documents, having a reflection of electromagnetic radiation in at least one wavelength sub-range of the visible spectrum and an absorption of electromagnetic radiation in the infrared range. The invention further relates to an ink spoilage kit for marking documents using the anti-theft ink, to a method for marking documents using the ink spoilage kit, and to the use of the anti-theft ink to mark documents. |
