What are blue prints ?
So what are blueprints ? and how do they differ from an engineering drawing ? are these things the same thing, with the exception that the former is printed on some blue colored sheet or so ?
Replies
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Ramani AswathWhen we were students and during early days of work (1950-60s) drawings were actually made by hand on a translucent tracing sheets using Indian Ink. These were reproduced in an blue printing machine which produced a negative drawing with white lines on a blue background (hence the name).
I have myself used one of these ungainly machines.
It was also called ammonia prints. Some sheets will give sepia toned prints.
Here is more info:
Blueprint
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