The Ben-Day dots printing process, named after illustrator and printer Benjamin Henry Day, Jr., (son of 19th Century publisher Benjamin Henry Day)[1][2][3][4] is a technique dating from 1879.[5] Depending on the effect, color and optical illusion needed, small colored dots are closely spaced, widely spaced or overlapping.[6] Magenta dots, for example, are widely spaced to create pink. Pulp comic books of the 1950s and 1960s used Ben-Day dots in the four process colors (cyan, magenta, yellow and black) to inexpensively create shading and secondary colors such as green, purple, orange and flesh tones.[7][8]