UMAX Technologies PowerColor, User Manual, Page: 104 / 127

5-22 PowerColor User Guide
Working with the Gradation Table
The gradation table in the CMYK Gradation window represents ink coverage on
the press in numerical terms. The rows go from shadow values at the top to high-
lights at the bottom. The columns perform the following functions:
• Reproduction density: shows the input density for the shadow point (top)
and highlight point (bottom) in increments of 1/8 tonal point.
• Cyan Dot %: shows the dot percentage for Cyan ink at each tonal step. Since
Cyan is the densest ink, this value is, in effect, the maximum dot size.
• Total Ink: shows the total dot percentage at each tonal step. Total ink cover-
age is determined by Grad 4 and UCR/GCR.
Note: Adjusting the UCR/GCR curve is a power-
ful means of controlling the total dot percentage.
• Cyan Dot After UCR/GCR: shows the maximum Cyan dot percentage after
the current UCR/GCR curve is applied. This column is useful in determining
how UCR/GCR affects ink usage.
• Black Dot %: shows the dot percentage of the Black ink at the various tonal
steps. These values are affected by adjustments in UCR/GCR, as well as
changes in the shape of the four-color or Black ink curves.
Note: It is not necessary to adjust the black
curve or percents. These are computed by the
color computer and should be used primarily as
reference. Changes to black should be governed
by Grad 4 and UCR/GCR. To understand the
table read across a row. For example, for the
table shown in Figure 5–8, the top row (shadow)
indicates that at a reproduction density of 1.308,
and a total ink coverage of 320%, a 100% Cyan
dot is reduced by GCR to 80% and the maxi-
mum Black dot is at 100%.