sir/madam,
please explain the blue print and give the method...
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Step-by-step explanation:
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Step-by-step explanation:
A blueprint is a reproduction of a technical drawing using a contact print process on light-sensitive sheets. Introduced by Sir John Herschel in 1842,[1] the process allowed rapid, and accurate, production of an unlimited number of copies. It was widely used for over a century for the reproduction of specification drawings used in construction and industry. The blueprint process was characterised by white lines on a blue background, a negative of the original. The process was not able to reproduce color or shades of grey.
The term blueprint is also used less formally to refer to any floor plan[2] (and even less formally, any type of plan).[3][4]
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