Blueprints were a low-cost alternative to copying designs onto paper or linen. where were blueprints first developed?

The energy applied to cause vibration can be in the form of air pressure a stick, bow, or electricity. true or fasle

Artists best achieve contrast in a composition by: a. drawing with realism b. shading a drawing with dark and light values c. using drawing techniques like stippling and hatching d. focusing on line and shape in a drawing

How many people were involved in the stainglass procedure and who are they