Etymology:
Blueprint * Blue: Originally derived from the color of the paper used in the process, which was blue-tinted for visibility. * Print: From the Middle English word "prent," meaning "impression."
Meaning:
Origin:
The term "blueprint" originated in the late 1800s, when an architect named John Herscheli patented a process for making copies of drawings on blue-tinted paper. This process, called cyanotype, used light-sensitive chemicals that turned blue when exposed to sunlight.
The blue-tinted paper made it easier to read the lines and details of the drawings, and the process quickly became popular for making copies of architectural plans and other technical drawings.
Over time, the term "blueprint" became synonymous with any detailed plan or design, regardless of whether it was actually printed on blue paper. Today, the term is often used figuratively to refer to a model or archetype for something.
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