UCR and GCR replace overlapped CMY with K.
UCR prevents overuse of toner in shadow areas.
GCR stabilizes quality of gray in highlight areas.
UCR = under color removal
GCR = gray component replacement
In UCR/GCR Settings, select Level 1 - Minimum Black: Skeleton.
supplementary explanationLevel 1 - Minimum Black: Skeleton: The generation amount of the black plate decreases the most.
supplementary explanationLevel 5 - Max Black: Full Black: The generation amount of the black plate increases the most.
Click Next.
2. Calculate CMYK Target Profile screen is displayed.
supplementary explanationGo to Calculating a Profile.