Below is probably one of the most mis-understood printers (well not actually a printer) of our time. The Seri Print 25 was a really cool in-line attachment to the Ricoh duplicators. You would replace the Ricoh ink with Seri Ink, and then you'd be able to print on any gloss coatings. The Seri printer used a UV light to cure the ink on the gloss coat. Alas the Seri is no more and Ricoh is just about out of the duplicator industry now.
Enjoy the threads from ten years ago this week!