X - R i t e e X a c t 2
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CIE L*C*h°
This function is a colorspace equivalent to CIEL*a*b*, the main difference is that in L*a*b* the color values are
plotted in a Cartesian coordinate system, while L*C*h° is polar coordinate system. L* stays the same, but C*
refers to chroma or strength which is the radius and h° is the hue angle. When a valid standard is present, the
delta values will be included along with the
∆
E type that is configured.
CIE XYZ
These tristimulus values of a color are the amounts of three primary colors in a three-component additive model
needed to match that test color. CIE XYZ serves as the basis from which many other color spaces are defined.
Shows delta XYZ values if a valid standard is present.
CIE Yxy
This function is directly derived from XYZ values. Y still represents luminance or brightness of a color. The x and
y are calculated from the XYZ values to define chromaticity of a color represent normalized values of X and Z. A
plot of x and y values for solid and overprint patches can reveal the color gamut that can be achieved. The x and
y values are also used as part of other functions for estimating appearances of inks at varying
thickness/concentrations. Delta Yxy values are also shown if a valid standard is present.
Contrast
This function is used for checking the dot quality in the shadow areas. The contrast is calculated from the
measured values of the solid ink density and the screen ink density in the shadow area. This function allows two
auto color response settings, Auto and Spot; or you can manually set the color response to one of the process
colors.
∆
E Trend
This function plots the
∆
E (uses the active
∆
E method setting) value of the current and past samples that have
been measured to the current standard. The graph will show up to 10 of the latest readings.
Density
This function is the measure of the ink thickness. For the process colors Cyan, Yellow, Magenta, or Black the
desired Density Status (A, E, I, T, G) needs to be configured. For spot inks the result is given as the density
value at the wavelength of maximum density for the spectral curve. This function can be optionally configured to
subtract the white base/substrate. Auto color picks the dominant color response and also displays the last
measurements for the other colors (C, M, Y, and K). Spot color picks the dominant spectral density wavelength.
You can manually select the color response as well (C, M, Y, or K). In Jobs, the color response shown depends
on the particular patch measured.
Density & CIE L*a*b*
This function allows you to view a density result as well as L*a*b* values in the same results area. The modes
(Auto and Spot) will display either the dominant process ink (C, M, Y, or K) or the dominant spectral density
response. When a valid standard is present, a Delta/Absolute button will appear that lets you change the results
between absolute and delta results of the latest sample.
Density & CIE L*C*h°
This function allows you to view a density result as well as L*C*h° values in the same results area. The modes
(Auto and Spot) will display either the dominant process ink (C, M, Y, or K) or the dominant spectral density
response. When a valid standard is present, a Delta/Absolute button will appear that lets you change the results
between absolute and delta results of the latest sample.
Density Balance
This function is used to compare a Gray Balance Patch to a defined standard with easy to read graphical
indication.
Summary of Contents for X-Rite eXact 2
Page 1: ...User Guide ...
Page 2: ......
