Dot Gain

Dot gain is the tendency for all printing dots—halftone, stochastic or hybrid—to grow larger on-press, a part of every printing process. Dot gain occurs at all tonal values, but is most visible in the midtones and in the deep shadows. Dot gain is either real (gains that result from printing processes) or perceived or “optical.” Optical dot gain is the result of an optical illusion; although it is not physically present, its illusion is, and its gain must be considered).