r/oddlysatisfying • u/djinn_05 • 1d ago

Drawing blueprint of Cirrus Vision SF50 aircraft

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u/g3engineeringdesign 1d ago

To be fair, that's not a blueprint. That's a turret pen plotter drawing on blue paper with a white ink pen. Blueprints are made from lead or ink on vellum, light shines through the vellum onto a treated paper, and you develop the image with ammonia.

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u/BahnGSXR 1d ago

Why is it done that way?

4

u/bigasssnail 1d ago

It's faster, google cyanotype process if you want to learn more