Coating composition including fluorescent material for producing secure images
US8747997B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2010 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Feb 5, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24802
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A coating composition, system, and method for printing documents that are difficult to chemically or physically forge and that are easy to visually verify are disclosed. The system includes a substrate, a toner, including a colorant and a dye, a coating including fluorescent material, e.g., a primary migration-enhancing coating, applied using an offset printing process and optionally a secondary migration-enhancing coating applied using an offset printing process. An image formed using the toner of the invention is readily verified by comparing a colorant-formed image and a dye-formed image and/or to a reverse negative imaged formed by the dye quenching the fluorescent material. In addition, if a solvent is used in an attempt to alter the printed image on the substrate, the dye migrates or diffuses to indicate tampering with the document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.