Dot gain is a phenomenon that happens when the size of a printed dot increases during the printing process. This cause the quality of the final printed matter to be distorted with respect to color. To a large extent this can be controlled after careful monitoring of the whole process of printing. A densitometer will be required to predict dot gain more accurately. Dot gain is controlled better in a CTP process than in a film to plate process. During plate exposure and processing there can be dot loss instead of dot gain if the plates are over exposed. In the Technova Polyjet system there can be dot gain or loss in the film if the ink density adjustment is not accurate in the Epson printer. At our press we use a ink density setting of 40 percent for 1440×1440 dpi at 125 lpi using a linearization file for 125 lpi.
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