Activity 9: Use Verification reports to verify color response with a print curve

Background

You can generate a PDF Verification report to verify the following:

• If a calibrated color response of a print calibration curve, Primary Color Output (PCO) or Secondary Color Output (SCO) matches either the target response or the predicted response.

• If a predicted response of a print calibration curve, PCO, or SCO matches the color response of the simulation or conversion target using the curve or DeviceLink method you have chosen.

Tasks

Goal
Create Verification reports to check if the color response of a print calibration curve matches the target. In this activity, you will create two reports:

1. The first Verification report compares the predicted response to the target response
2. The second Verification report compares the measured color response to the target response 
   

This activity assumes you already created a print calibration curve XX new print calibration curve for gray balance in a previous activity . 

Task 1: Generate a Verification report to compare the predicted response to the target response

1. In ColorFlow, click the Print Curves tab.
2. In the Calibration Curves table, select XX new print calibration curve for gray balance.
3. In the viewer window, click the Verification icon in the connector between the CMYK Reference and the Offset Press panels.
4. In the Calibrated Output Verification dialog box, click the Measurements tab at the top of the window.
5. In the Predicted Response list in the bottom section, select Predicted Process Inks Response Origin and then click Report... at the bottom right side.
6. In the Customer box, enter the report name: XX verification report to verify predicted response (where xx is your initials).
7. In the Comparison section at the bottom, select the Compare to check box, which automatically select the Calibration Target.
8. Click Save and choose a location.
9. Open the generated PDF to view the report.

Task 2: Generate a Verification report to compare the measured response to the target response

1. In ColorFlow, click the Print Curves tab.
2. In the Calibration Curves table, select XX new print calibration curve for gray balance.
3. In the viewer window, click the Verification icon  in the connector between the CMYK Reference and the Offset Press panels.
4. In a real-life situation, you export the measurement chart used to characterize the uncalibrated color response, output from Prinergy, print it on the press and measure in ColorFlow to characterize the calibrated color response to be able to generate a Verification report. 
   But for the purpose of this training, you will import a measurement data:
   1. Click the Measurements tab at the top of the window.
   2. In the Measured Responses section in the upper area, click Import.
   3. Import the verification data file (Approval_GRACoL_VerificationData.cgt).
      The data file appears in the Measured Responses list. 
5. In the Measured Responses list, select the imported measurement and click Report... under the Measured Responses section in the middle area. 
6. In the Customer box in the Print Report Definition dialog that appears, enter the report name: XX verification report to verify calibrated color response (where xx is your initials).
7. Select the Compare to check box under the Comparison section at the bottom.
8. Select Calibration Target
9. Leave the Color Difference Metric: as the default DeltaE ab (1976)
10. Click Save and choose a location.
11. Open the generated PDF to view the report.

Outcome

You have generated two Verification reports to verify if the predicted color response and the measured color response match the target.