In addition to contone proof profiles, you can also create n-channel halftone proof profiles for use in GMG ColorProof. The profiles are calculated with the same prediction engine and are based on the same color assets as the contone proof profiles, thus easy to calculate on top of already existing data.
As a basis for dynamic profiling, you need a CMYK DotProof profile, reflecting the process colors used in the printing process. Spot colors can be added after the CMYK profile calculation (see also Spot colors in halftone proofs).
Prerequisites for creating a DotProof profile
- OpenColor project with CMYK characterization data
- Proofing condition which supports DotProof
- Preferences: Ensure that the option Use recommended resolution for DotProof profiling is active.
How to create a DotProof profile (step-by-step)
- On the Tools & Actions panel of the project, click Ink Settings to define the ink settings, especially the screen angles. These settings are mandatory for calculating DotProof profiles. Including the imagesetter resolution, the screening settings should match the actual target printing conditions you want to simulate:
- Click the RIP tab and select the RIP Compensation Curve from the drop-down list that has been used to create the 1-Bit files you want to proof. The list shows all gradations stored in the OpenColor database. Save by clicking OK.
- On the Tools & Actions panel, select a Proofing Condition, i.e. the printer-medium-combination you want to use to print the halftone proof.
- On the Tools & Actions panel, click Calculate DotProof Profile.
- Select all channels you want to include in the profile and click OK to start the profile calculation.
- After the profile calculation, under Finalize, click the Iterate button and iterate the profile at least twice (three iterations are recommended for high quality profiles):
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Publish the project for a specific proofing condition to enable dynamic profiling.
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Save the project.
OpenColor will synchronize the data to ColorProof which in turn automatically creates a proof standard.Note: The profile must be iterated to create a DotProof proof standard in ColorProof. If it isn't iterated, OpenColor will sync the data, but ColorProof will create a contone proof standard from it.
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