Adjust White Point

[indy jones]

How do you tweak an industry Gracol 7 reference data set based upon your own custom substrate white point? We switched to a press sheet that is -6 in the b*?

[meddington]

There is a substrate relativity calculator excel file available from the Idealliance website that will do this.

Substrate Relativity Calculator Kit 20120606 | IDEAlliance

[rich apollo]

If you open the data set in Excel, the white point appears twice. You can simply change the white point noted in the profile and then build a new profile - if you build the profile to have neutrals relative to the paper. By the way, you'll have to grab your Lab values for the paper; but you'll also have to calculate the associated XYZ values. It's easy with the right tools.

You could also perform a white point adjustment on the profile.

I have used the first option numerous times with very satisfactory results, and on a several different paper types.