pertaining to or designating plates, processes, or the pictures made by them, in which gradation of tone in the photograph is reproduced by a graduated system of dotted and checkered spots, usually nearly invisible to the unaided eye, produced by the interposition between the camera and the object of a screen. The name alludes to the fact that this process was the first that was practically successful in reproducing the half tones of the photograph.
A photochemical process to transfer a photographic image to a relief plate that can be printed on the same press as type. The continuous tones of the photograph are converted into a pattern of tiny dots (larger and closer together in the dark areas) that are visible under magnification. In duotone printing, two passes of the press are used. The process was first used commercially in 1880.
The process of breaking down a continuous tone (contone) image into solid spots of differing sizes to create the illusion of transitioning greys or colours in a printed image. Half-toning is used in traditional printing and publishing.
a printed picture that uses dots to simulate the tones between light and dark. A printing press cannot change the tone of ink - it will only print the ink color being used on press. This works well for printing text or line art: the press simply puts a full dose of ink for each letter or line onto the paper, creating small solid areas of ink. BUT black-and-white photographs are continuous tone images, and printing a photograph this way would have the same result: large solid areas of ink. White areas of the photograph would have no ink; black areas would have black ink; and gray areas would have black, not gray, ink. The halftone mimics the continuous tone of black-and-white photograph by converting the picture to dots. The result is strikingly similar to the continuous tone of a photograph.