Halftone is a printing technique that creates the illusion of continuous tones by using small dots of varying sizes and spacing. This method allows for the reproduction of images with gradients and shades, making it possible to print photographs and illustrations in newspapers, magazines, and other media. The process involves converting an image into a pattern of dots, where the density and size of the dots determine the darkness or lightness of the printed area. Halftone is commonly used in conjunction with color printing, where different colors are layered to produce a full-color image, often seen in works by artists like Roy Lichtenstein.