The tone line process is a photographic technique used to reproduce an image so that it resembles a pen-and-ink drawing. This method converts the continuous tones of a photograph into distinct lines and areas of contrast, creating an artistic, illustrative effect.
Photographers and printmakers use the tone line process to produce stylized images for publications, illustrations, or creative projects. By controlling line density and contrast, this technique allows for visually striking reproductions that highlight form, texture, and detail in a graphic, hand-drawn style.