Angstrom Technologies Incorporated turned to us to produce advertising/sales slicks and swatch color cards to display several different security ink options. These inks needed to be printed with the ultimate precision to assure their invisibility component. In order to view the special inks you will need to use a UV black light. The true difficulty in the procedure is printing what is invisible to the naked eye.
The process: 6 color process inks and 8 color invisible inks.