Etymologies
Over time, this became a metaphor for any set of ideas repeated identically, en bloc, with minor changes. In fact, cliché and stereotype were both originally printers' words, and in their literal printers' meanings were synonymous. Specifically, cliché was an onomatopoeic word for the sound that was made during the stereotyping process when the matrix hit molten metal. This was known as 'dabbing' in English. Precisely, the forme was placed on molten lead at the point of cooling to make the cast.
The term "stereotype" derives from Greek στερεός (stereos) "solid, firm + τύπος (tupos) "blow, impression, engraved mark" and in its modern sense was coined in 1798.
Read more about this topic: Stereotype (printing)