IPA: /ˈpleɪtˌmeɪkər/
KK: /ˈpleɪtˌmeɪkər/
A person or machine that creates printing plates used in the printing process.
The platemaker prepared the plates for the new book printing.
Platemaker → It is formed from "plate" (from Old French *plate*, meaning a flat dish or surface) and "maker" (from Old English *macian*, meaning to make or create). A platemaker is someone who makes or creates plates, typically in a printing or manufacturing context.
Think of someone who 'makes' ('maker') 'plates' ('plate') — that's why a platemaker is a person who creates plates.