^this is how I use twitter as well. Thriving community in this tiny corner of the web, focusing on neat electronics projects and interesting tech or creative hobbies.
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.