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2. halftone-an engraving used to reproduce an illustration. halftone engraving, photoengraving. engraving-a block or plate or other hard surface that has been engraved.
In conventional printing, halftones are created by photographing an image through a screen. The screen frequency, measured in lines per inch, determines how many dots are used to make each spot of gray. In theory, the higher the screen frequency (the more lines per inch), the more accurate the halftone will be. However, actual screen frequencies are limited by the technology because higher screen frequencies create smaller, more tightly packed dots.