I get a lot of requests for white ink (or a light color ink) to be printed on a dark paper…this requires a specialized printing process…it can sometimes be achieved with thermography (raised ink), we have had success printing gold on dark red and silver on navy, but mostly for a clean crisp print you need to do a foil or letterpress print or engraving, which can get very expensive.
We have done the white on black using a “knockout” print…we print (flood) the entire (white) page with black ink and reverse out the type so the text appears white on black…pretty neat looking if you ask me!