Screens are Screaming for Attention

FM (frequency modulated) screening (also called random or stochastic) uses a small dot that remains constant in size. Color density is achieved by randomly varying the spacing of the dots to achieve a different number of dots in a given area. This method can improve highlights and shadows, and eliminates moires and rosettes that can result from the set line-pattern of AM screening. In the mid-tone areas, however, reproductions can appear grainy.