Method for producing a security product, in particular, a stamp dye or ink involves use of pigments which lie in the infrared region and are identifiable only by a particular known reading device

摘要

The method for producing a security product, in particular, a stamp dye or ink involves providing the basis material of the product with pigments which lie in the infrared region, and are identifiable only by means of a particular known reading device. Also claimed is a resultant dye on water, alcohol or oil basis.