Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Troy Group, Inc.filedCriticalTroy Group, Inc.
Publication of HK1168155ApublicationCriticalpatent/HK1168155A/en
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.
HK12108875.9A2009-10-202010-10-18Coating composition including fluorescent material for producing secure images
HK1168155A
(en)
Authenticable anti-copy document and method to produce an authenticable anti-copy document with a combined void pantograph and faux watermark security features