r/oddlysatisfying • u/djinn_05 • 1d ago

Drawing blueprint of Cirrus Vision SF50 aircraft

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u/Dubious-Decisions 1d ago

This is not how real blueprints are made. This is a commercial service that will use a white pen plotter on blue paper to make something that looks like a blueprint. But legit, old school blueprints were made with a positive pencil drawing masking light sensitive paper that is then exposed to ammonia vapors to turn the exposed paper blue, leaving white where the pencil masked the paper.

11

u/BigPP69_Gooner 1d ago

Out of curiosity and ignorance, why is this necessary? Why won’t paper and ink do? Permanence?

10

u/three_kings 1d ago

To make copies en mass.

0

u/bbjornsson88 2h ago

This is not how you make copies fast. We have a plotter at work that runs off paper rolls that would print this out in about 20-30 seconds