In printmaking, a process using screens of various dot patterns to mechanically produce shading effects. This process was invented by Benjamin Day (1839-1916). Roy Lichtenstein (American, 1923-1997) included benday as one of the elements in his paintings signifying Pop Art qualities.Examples: Roy Lichtenstein (American, 1923-1997), Vicki, 1964, enamel on steel, 42 x 42 inches, Minneapolis Institute of Arts.The commercial use of benday has become more and more rare with the rise of digital imaging.