How to iterate a DotProof profile

You can improve the accuracy of a halftone proof profile by iteratively refining it based on measurement results.

Step 1: Start the Iteration

1. Open your Project.

2. Select the desired halftone proof profile.

3. Click Iterate in the Actions bar.
   

Step 2: Export and Print the Test Chart

1. In the iteration dialog, click Export below the chart preview to export the test chart as a PDF.

2. Process the exported PDF in your imagesetter RIP.

3. Print the resulting 1-bit files in GMG ColorProof using the exported DotProof profile.

Step 3: Measure the Chart

1. Reopen the iteration dialog.

2. Click Measure Chart to measure the printed chart directly in GMG OpenColor.

Alternative:
You can also measure the chart using third-party software and import the measurement data.

Step 4: Review Measurement Results

• The system displays:

  • Average Delta E

  • Maximum Delta E

• For a detailed breakdown of all measurement values, click Statistics.
  

Step 5: Repeat the Iteration

Repeat the process (export → print → measure) until the results meet your expectations.

Recommendation:
Typically, up to three iterations are sufficient, as Delta E values usually reach an acceptable level by then.

Step 6: Select the Final Iteration

• Choose the iteration you want to use.

• Mark it with the green check mark to apply it.

How to print 1-Bit test chart files in ColorProof  

1. Create a new job in GMG ColorProof and load the 1-bit TIFF files of the test chart, marking all four separations. 

3. Under Merge files, select a recognition pattern (for example Generic 1-bit). 

4. Ignore the other options in this dialog box and click Open to edit the job in the Manual Job Manager. 

5. Job > Printer Settings > Printer: From the Printer list, select your printer. 

6. Job > Printer Settings > Printer: From the Medium list, select the loaded medium. 

7. Job > Printer Settings > Printer: Under Calibration Set, select the calibration set with the print mode you will use for printing the proofs later. 

8. Image > Color Management > Proof Output: From the Proof Standard list, select Custom. As Proof Profile, select the MXD DotProof profile you are creating. (Each iteration changes the profile, please make sure to always use the latest profile for test chart printing.) 

9. Click the Print button on the toolbar to print the job.