Dot Gain Compensation (DGC) is a calculation that reduces the digital tone values in the file to preemptively counteract the physical dot gain expected on the printing press. The compensation curve is created based on physical press tests and stored in color profiles, but its execution occurs within the RIP (Raster Image Processor). The RIP applies this curve after color separation and before screening, modifying the tonal values sent to the CTP device.

The DGC process is crucial for both AM Screening and FM Screening, although the latter is more complex. Because lithography is prone to physical variables (ink spread, pressure), this adjustment ensures that a desired 50% tone, which might otherwise print at 60%, accurately outputs at the intended value. This management ensures color integrity and adherence to quality standards.