Gerhard wrote: Gerhard wrote: > That's my impression as well. Obviously they only support > a limited set of printers. Thus I also guess it is just > a trichromatic CIS scanner plus a database of calibration > data for correcting the scans for the different typical > reflectance spectra produced by the different supported > printers. Or, I wonder whether it may just be that they have decided to optimise the test charts for the various tonal responses of the different printers. (if you look at their "how it works" section on the web site, step 1 is to choose the test chart for the specific model of printer to be profiled) Greg.