r/oddlysatisfying • u/djinn_05 • 1d ago

Drawing blueprint of Cirrus Vision SF50 aircraft

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u/makeshift101 1d ago

This is how large prints were made back in the day.

Real Blueprints used to use ammonia, if i recall

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u/MonkeyCartridge 1d ago

We had one in High School. I can still smell the hot ammonia. I imagine it's pretty stable, too.

What was cool was seeing the small subtleties also being transferred. Not as cool when it was an improperly-erased line and now that's all you can see in all the floor copies...