Invention Grant
US06926764B2 Ink set, printed article, a method of printing and use of a colorant 有权
油墨组,印刷品,着色剂的印刷和使用方法

Ink set, printed article, a method of printing and use of a colorant
Abstract:
The invention relates to an ink set comprising a plurality of inks of a first and of a second group, having different colors. Inks of said first group comprise a visible colorant and an additional IR-absorbing compound (IR-taggant) which has an absorption peak at a predetermined wavelength in the near infrared. Inks of said second group comprise a visible colorant which has at the same time an infrared absorption peak at the same wavelength as that of the IR-taggant used in the inks of the first group. Preferred embodiment is a four-color process ink set comprising an IR feature.
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