Any photomechanical printing surface or the impression therefrom in which detail and tone values are represented by a series of evenly spaced dots in varying size and shape, varying in direct proportion to the intensity of tones they represent.
A process whereby gradations of tone in a photograph, drawing, or painting are translated into small dots by being photographed through a glass or contact film screen. The screen simulates the grays produced by commercial printing by reducing tones to a series of dots. These dots vary in size, shape, and spacing in direct proportion to the tones they represent.