Header Fields

The header fields in an ICC profile contain information and settings that apply to all ICC profile types. Most of these fields are for information purposes only but some can be edited:

Preferred CMM

This setting is typically used in applications or printer drivers that do not allow the setting of the desired CMM (Color Management Module). CMM selection and arbitration is a complex issue that takes into consideration the available CMM’s, the ability of the selected CMM to perform the desired operation and other factors. Change the setting with the popup menu and then save the profile using “FileSave” for the change to take effect.

The CMM used in ColorThink 4 is "LCMS" (littleCMS).

This CMM also enables ColorThink to offer the same module for both Windows and Mac platforms. For those who need consistency between operating systems, this ensures that you will get the same numbers on both systems (for example, when calculating profile gamut volume.)

Default Rendering Intent

This setting is typically used in applications or printer drivers that do not allow the setting of the desired rendering intent. Change the setting with the popup menu and then save the profile using “FileSave” for the change to take effect.

A diamond will appear next to the profile icon showing the profile has been altered and the change has not yet been saved.

Device Information

Device Information represents data bits that are available as part of the ICC specification. In practical usage, these bits have been very rarely even used in the industry, either from the profile creation side, or from the software that would use profiles. Most profiles will show these bits at 0.