nino loss wrote: > Would it be therefore better to leave out -r or to even increase it > above the average? If you have no particular reason to change it, leave it at its default. It has been set to a default that should be a good starting point. If you have more information to go on (say you measured a similar type of pigment chart with a lot more test patches, and can use that to evaluate the underlying accuracy of the profile), then you could tune the -r parameter to better suite your device and situation. But of course if this is a one-off, then you would simply use the more patches for your profile. Graeme Gill.