Ink set, printed article, a method of printing and use of a colorant
US6926764B2 · kind B2 · utility
50Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2002 |
| Grant date | Aug 9, 2005 |
| Priority date | — |
| Expiry date | Aug 30, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24802
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.