When Color Priority is selected
a) Letter areas
The UCR ratio is set to 100% to reproduce the letter areas well. Black toner
is always used if RGB Common Data is greater than zero.
b) Photo areas
In photo areas, black toner is not used until RGB Common Data reaches a
certain value, which depends on the UCR adjustment setting (see below).
This can be one of 9 settings as shown in the above illustration.
Also, the UCR ratio changes with image density. The steeper the gradient in
the above graph, the faster the UCR ratio increases with image density (as
RGB Common Data increases).
The UCR range for the photo areas can be changed over 9 levels by the
user (Image Adjustment: UCR Adjustment) to get the best color reproduction.
UCR ratio: 100%
UCR
settin
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