Transitioning from Pre-Civil War Paper Plans to the Digital Age

A History of the Blueprint ​Blueprints were invented a generation before the Civil War by John Herschel, a chemist, astronomer, and photographer, in 1842. Herschel developed the cyanotype process that started with a drawing on semi-transparent paper, weighted down on top of a sheet of paper. The paper was coated with a photosensitive chemical mixture […]