Verifying a Proof with GMG ProofControl Inline
Some of the features described in the following may not be included in the standard GMG ColorProof version and require an additional license (GMG DotProof, GMG FlexoProof, GMG ProfileEditor, GMG ProofControl Inline, or GMG OpenColor). Please contact your local dealer for details.
For printers with an embedded SpectroProofer, the drying time after printing is very important for achieving correct measurement results. Different settings are recommended for different types of measurement. Drying settings can be changed in the Change Media dialog for each printer (> Media Specific Printer Settings).
Measurement Type | Drying Method | Drying Time |
---|---|---|
Measuring a control strip | Air Drying | 5 min |
Recalibrating (GMG AutoCali Wizard) | Air Drying | 5 min |
Measuring a Full Gamut test chart | Air Drying | 5 min |
Measuring a Gamut test chart | Air Drying | 15 min |
Optimizing an MX4 Profile | Air Drying | 15 min |
- On the navigation panel on the left of the main program window, click System.
- Click the GMG ProofControl Inline tab.
- In the Proofer Supporting Direct Label Printing group, from the Print Label Automatically on Proofer list, select Always or Only if Verification Passed.
- Create a job for an Epson Stylus Pro x900 printer.
- Job > Label/Strips > Job Control Strip: Select the option Proof Control Strip. (Alternatively, select an image control strip.)
Please note that job control strips cannot be used for GMG OpenColor jobs.
- From the Measuring Device list, select Epson Integrated Measuring Device.
- Select a Control Strip Type and determine where to place the strip.
- Print the job.
GMG ColorProof will print the job with the control strip. The color patches will be automatically measured by the integrated measuring device.
The print medium will be rolled back and the GMG ProofControl Inline label will be printed next to the control strip. If you have selected the option Only if Verification Passed, only labels with the result "Passed" will be printed. If you have selected the option Always, labels with the result "Failed" will be printed as well.
The verification status of each job will be shown in the History view.
GMG ColorProof does not validate that the control strip matches the proof standard used when printing a job. If a proof verification fails, check that an appropriate control strip has been used.
Proof verification status shown in the History view.
The three highlighted jobs show the three possible verification statuses Pass, Unknown, and Fail.
Description | Additional Info | |
---|---|---|
1 | Verification status |
The overall verification status of the entire job is illustrated by a green check mark (Pass), red cross (Fail), or yellow question mark (Unknown). "Unknown" means that a verification was not possible for any reason, for example, because the proof standard did not contain target values compatible with the measured control strip. Printing multiple control strips in a single job: If the verification of only one control strip failed, the verification status of the entire job will also be "Fail", even if the verification of all other control strips passed. |
2 | Verification results | For different print standards, different criteria are specified for verification of a proof. Therefore, you might find different parameters for different print standards in the software. If all required criteria are met, the verification status is passed. |
3 | Show Report button |
Generates a report compliant with the ISO 12647-7 standard in XHTML format. You can right-click the upper part of the report window to open the context menu and print the report on any printer installed on the Windows operating system. The report shows the used standard and control strip, the measurement conditions, the verification results, and the measurement values for all color patches. |
Generally, proofs that fail the verification cannot be used for contract proofing. In most cases, a verification fails because the printer is not in a calibrated state. This can easily overcome by recalibrating the printer.
GMG ColorProof efficiently prevents that further jobs are printed after the first job failed the verification, which saves valuable production time and resources. You can activate this function here: System > GMG ProofControl Inline > Failed Proof Standard Verification > Set Calibration Set to "Not Calibrated".
In combination with the function Output > Printers > Automatic Actions if Calibration Set Status is Changed to "Not Calibrated" > Start Automatic Calibration, GMG AutoCali Wizard will start automatically, thus minimizing the downtime of a printer.
Example:
You are using two print modes on the same printer–medium combination. For example, job A uses a print mode with a resolution of 300 dpi and job B uses a print mode with a resolution of 600 dpi. Both jobs use the same proof standard, ISO Coated v2 (39L). The proof verification of job A failed, but was successful for job B.
This means that the "300 dpi" calibration set needs to be recalibrated for this printer–medium combination. The "600 dpi" calibration set is still ok and can be used for printing.
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With GMG ProofControl Inline, users at remote locations can automatically verify proofs against their standards.
- To use GMG ProofControl Inline, only the target remote location needs the license, not the creator of a job. If the target remote location does not have a GMG ProofControl Inline license, control strips will be measured without a verification. (The measurement data can still be imported into GMG ProofControl for a manual verification.)
- As using a custom proof profile (without using a proof standard) is not supported by GMG ProofControl Inline, you need to link the job data to the job when exporting (option Link to Color Profiles) so that the proof profile of the target remote location will be used. The export option Embed Color Profiles is not supported.
- To guarantee a smooth workflow, jobs containing control strips for an integrated measuring device will be printed anyway. If the job is printed on a printer that does not support such a device, the job will be printed without the control strip.
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