Profile Quality and Profile Size

As in general, the profile quality is depending on the quality of the characterization data: the more consistent and harmonic characterization data you feed the system with, the better the optimization and thus overprint simulation. Further quality factors include the number of profile fulcrums, and the Proofing Condition.

Color accuracy

The color accuracy and the visual impression of a proof depend on the quality of the characterization data and how well the printing process itself is standardized. It will be difficult to provide a perfect match of print and proof if print runs already show significant deviations.

The color accuracy is technically limited to the color space of the proofer, represented by the Proofing Condition. This is the reason why GMG OpenColor supports only multi-ink proofers with an extended color space.

You can easily check whether all printing inks used in the printing process are in-gamut by printing a spot color control strip together with the proof job in GMG ColorProof (see "Verifying Spot Colors").

Number of fulcrums and profile size

The number of fulcrums in a profile is based on the number of patches in the test charts used for profiling. The higher the number, the more information is included in the profile and the higher is the file size.

You can choose to not use all available patches if you want to reduce the file size. Depending on the Maximal Profile Size (Options > Preferences), the number of fulcrums is automatically reduced by the software, but can be edited in the manual profile creation.