The ‘Radiation’ Printer (2000)

IBM replicated this in the 4100 series (https://www.cnet.com/products/ibm-infoprint-4100-printer-mon...) I got to see an earlier one at an IBM plant in Boulder which was about 10' long. Where most printers had a way to feed in pages this one had a way of feeding in new 4' tall boxes of fan fold paper.

Tldr: radiation was the brand not the technology. It printed 7 pages per second (420ppm) on special media comprised of 2 layers, a top white layer and a middle black conductive layer. The paper was held on a huge continuous roll and cut off into 11x11” square pages. The image was created by electrically ablating the top white layer, in a 7x9 grid per characacter.