The Dark Origins Of Printers Devils
A printer's devil was not a supernatural demon, but a lowly apprentice tasked with the filthiest jobs in a print shop. These young workers often had their skin permanently stained black by the ink and soot of the heavy machinery.
During the early days of printing, the youngest assistants were nicknamed devils because they were constantly covered in messy ink. They handled the most grueling physical labor, such as cleaning lead type and scrubbing heavy presses. This common industry nickname inspired the title of a classic Twilight Zone episode, cleverly bridging historical work culture with spooky storytelling. It is a fascinating example of how a mundane job title can sound quite sinister to those unfamiliar with trade history.
Source: Printer's Devil