The Epson Monna Lisa also supports two spot inks (pigments), "across" and "overcoating" for print finishing. You can learn more about the printing process of these devices, by looking at the diagram at the end of this page.
The spot inks have specific tabs in the Page Setup window:
Info
For more details on the topic, please take a look at the article on Spot Inks.
For the "Across" spot ink, you can also configure the ink penetration: