Ben-Day dots
（重定向自Benday）
The Ben-Day dots printing process, named after illustrator and printer Benjamin Henry Day, Jr., (son of 19th Century publisher Benjamin Henry Day) is a technique dating from 1879. Depending on the effect, color and optical illusion needed, small colored dots are closely spaced, widely spaced or overlapping. 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.