Ben-Day Dots printing process , 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. 


warhol's work differs from roy lichtenstein's work.
 Lichtenstein created his work using processes and materials developed for traditional commercial production; Warhol developed methods for producing his work as if they were traditional commercial products.