[jcuads]

The gamut of a given profile is made possible by the colorants or strength of the colorants available. Keeping channel limits as high as the media allows and controlling the multiple ink levels within the Ink Limits provide the strongest foundation. e.g. if magenta at 100% reads 1.4 then Cyan does not need to be much higher than say 1.5, beyond that it will be cut down in the profiling process anyway. In this case to keep the K at 1.2 and the Y at 1.2 would provide a bit more than enough ink for the profiling process. For instance if the the Cyan was cut back to 1.1 then the M & Y will also be cut in the profiling process thus clipping or reducing gamut. Channel limits are not that critical in the sense of precise measurements. The important thing is to measure the values of the Cyan and Magenta then adopt to the lower reading of the 2 at 100% to avoid over inking. The K and Y end up a couple of tenths lower than the C and M. In conclusion whether to use Chroma or density readings is not as important to me as keeping reasonable balance while providing a little more than the necessary colorants to create the profile. With the HP 5500 the Cyan usually stays at 100% setting the path for the myk where as the Mimaki the Magenta stays at 100% instead.