Just a note to anyone who might be looking to work with multicolor profiles. Spec2cie doesn't seem to handle the multicolor ti3 files: D:\Argyll\spec2cie>spec2cie 6colortest.ti3 6colofwa.ti3 Unknown: Error - Device has unhandled color representation 'CMYKRB_XYZ' Back to the drawing board :) >You can apply Argyll's FWA compensation without using Argyll's profile >making. Simple use spec2cie on the spectral .ti3 files, then convert >the resulting CIE tri-stimulus values into whatever format you like. >It won't help if it's not a Fluorescent whitener effect though.