My first experince with thermal printing was in Jr. High school in the mid '60s. I used heat sensitive foils to apply the Dewy decimal numbers to lots of library books, with a wood burning tool and the foils.
Or in some cases, it is a combo copier/laser printer. I still have one of those thremal copiers, and a couple microfiche viewers. One of them is a printer as well.
What? You never learned to put a blank page in the front and back of a binder full of lser printed pages? ;-)