Dot Gain Compensation (DGC) for FM Screening is significantly more complex than for AM because the dot gain manifests as dot clumping rather than a predictable size increase. The microscopic dots of FM are highly sensitive to press variables, demanding steeper and more precise compensation curves to avoid visible Graininess in the final lithography output.

The Densitometer plays a critical role in this process by enabling accurate measurement of the physical dot gain on the printed sheet. Prepress teams use this data, captured via the densitometer, to create the essential DGC curve. This ensures that the digital compensation applied in the RIP correctly matches the physical reality of the printing press, thereby maintaining color fidelity and quality control for both AM and FM screened jobs.