[header] How to make blueprints [title] Know the terminology. [step] Whether a cad print, or a manually-produced drawing, these are termed a " reproducible " or sometimes known as your " originals ". These are produced on vellum or some type of drawing medium that allows light to pass through it. 
When someone uses this type of media for their originals (also known as a reproducible), they typically intend to make a " blueline blueprint ". This means a print that is actually light-bluish in color with darker blue lines than the light blue background.