A professor once gave me a demo of a printer that could erase its own work and print a new image on the same regular printer paper. In between the two prints h

A professor once gave me a demo of a printer that could erase its own work and print a new image on the same regular printer paper. In between the two prints he let me mark the page however I wanted so I could be sure it was the same physical page coming back out. He admitted there was no market for such a thing but it was cool to see anyways. This was in the mid 1990s