A person who creates blueprints; someone who makes detailed plans, technical drawings, or designs for buildings, machines, or other projects.
Agent noun from 'blueprint' (blue + print + -er), referring to someone who makes or uses blueprints professionally in architecture, engineering, or planning.
Blueprinter was a real, distinct profession in the 20th century—offices full of people whose entire job was operating blueprint machines—but it's nearly disappeared as a job title, much like 'typist,' because digital technology completely transformed how technical drawings are made.
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