Halftone: The Illusion of Continuous Tone
Halftone is a reprographic technique that simulates continuous-tone imagery through the use of dots, varying either in size or in spacing, generating a gradient-like effect.
Because most printing presses cannot vary the intensity of ink, they use halftone dots to trick the human eye. Small dots appear as light gray, while large, overlapping dots appear as dark black. For example, if you look closely at a physical newspaper or a vintage comic book, you will see that the “smooth” colors are actually made of thousands of tiny colored dots.
Frequently Asked Questions
LPI stands for “Lines Per Inch.” It refers to the frequency of the dot grid. Higher LPI results in smaller dots and a smoother-looking image.
A Moiré pattern is a distracting visual interference that occurs when two halftone screens are overlaid at the wrong angle.
In “Pop Art” (like Roy Lichtenstein’s work), halftone dots are exaggerated to create a retro, industrial, or “comic book” aesthetic.
In color printing, four separate halftone screens (Cyan, Magenta, Yellow, Black) are printed at different angles to create the full spectrum of color.
AM (Amplitude Modulated) uses dots of varying sizes. FM (Stochastic) uses dots of the same size but varies their density/placement.
Yes. Designers use halftone filters to add texture, create retro styles, or prepare artwork specifically for screen printing.
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