Certification
Use this dialog to check print quality by measuring a spot ink characterization chart against the CxF/X-4 color definitions. The application provides an instant pass/fail indication and various charts for assessing the deviations both visually and numerically. The measurement results can be uploaded to the Global Brand Assurance web server, which provides a wide range of reporting and analysis tools.
For step-by-step instructions, refer to Print Validation of GBA Jobs (Certification).
- Job
This the GBA print job you have selected in the main window. If this is not the correct job, close the dialog and select another job on the Global Brand Assurance tab.
Note:You cannot use the
button for selecting jobs from the GBA web server. Use this button for loading PDF, CxF/X-4, or QTX files stored locally. This will cause some dialog elements to change (see Certification dialog).- Spot color
This is the list of spot colors used in the selected job. Select the color to be measured next.
Clicking on one of the color boxes is an alternative to selecting a CxF/X-4 color definition from the list.
The boxes are marked up like in the following example if measurements have been made already for the selected tint value:
Validation successful (within tolerance limits)
Validation failed (out of tolerance)
If there are patches with different tint values for the selected spot color, select the tint value to be measured next.
<Spot Color Name>
- Reflectance Spectrum
Spectral reflectance curves for selected color and tint value.
X-axis: Wavelength of incident light in nanometers.
Y-axis: Portion of reflected light (1,0 = 100%)
Target values (reference):
. Actual values (measurement): 
.Target values for spot colors are defined by the CxF/X-4 data. Target values for process colors are calculated from the specified ICC profile or PDF output intent, respectively.
- CIE a*b* / L*
Graphical representation of
target and actual values calculated from spectral data:Hue (a*b*)
Lightness (L*)
- Colorimetric Data
- Target and actual values indicated numerically:
CIE L*a*b* (lightness, red/green hue, blue/yellow hue)
CIE L*C*h° (lightness, chromaticity, hue angle)
Deviation between actual and target color (delta E)
A pass/fail icon
indicates whether dE is out of tolerance.
To calculate dE, the program uses the tolerance value and dE formula stored in the CxF/X-4 metadata. A default value of 2.5 dE2000 is used automatically if these values are set to 0 or undefined.
Users can change these values by clicking
. - Metamerism index
The metamerism index (MI) indicates the probability that two samples (reference and measured sample) will show the same color deviation under two different illuminants.
ORIS CxF Toolbox calculates three MI values using D50 as a reference illuminant and A, C and F11 as test illuminants. Validation is successful
if all of these MI values are within the tolerance limit. Otherwise validation fails .The tolerance limit is the maximum deviation permitted from a target value of 0 dE. A value of 0 means that the reference and measured sample must show exactly the same color deviations under both illuminants. A value of 3.0 means that the samples are not allowed to differ in metamerism by more than 3.0 delta E.
The program uses the tolerance value stored in the CxF/X-4 metadata. If this value is 0 or unavailable, a default tolerance of 3.0 will be used automatically.
Measurement
Click this button to start the measuring process. The button changes to
.Perform a white calibration if requested to do so. Then repeatedly select a color/tint value combination and measure the corresponding color patch.
Click this button if you want to stop the measuring process. All measurement results will be discarded. The button changes to
.
Click this button to load CGATS and QTX measurement files created with a third-party tool. This useful is important if your measurement device is not supported by ORIS CxF Toolbox.
This opens a dialog allowing you to load measurement files and then assign a particular measurement to each CxF/X-4 color definition.
- Target
Actual 
The two big color boxes serve as a visual aid for assessing the difference between the target color and actual color.
The table underneath the button indicates the following:
Total number of measurements for all colors and tint values
Number of measurements remaining to be made
Number of completed measurements which are successful
Both delta E and metamerism index are within the tolerance limits
Number of completed measurements which have failed
Delta E, metamerism index, or both values are out of tolerance
Overall Result
- Icon
A big icon indicates the overall validation result when the last measurement has completed:
Successful
All measurement results are successful.
Failed
One or more measurement results have failed.
Incomplete
There are still measurements to make.
Click this button to upload the measurement results to the GBA web server.
This button is enabled as soon as one measurement has been made. It is disabled after being clicked.
Comments
This box allows you to enter a comment which will be uploaded to the web server together with the validation result. Comments can be entered separately for each CxF/X-4 color definition, but only if the 100% tint value is selected.
