Hello all, I have tested device link improvement many times. I am using an Epson Stylus Pro 4800 and EyeOne Pro with Contract Proof Paper and the IT8 target. As the input profile I am using ISO Coated and the printer profile was created with Profile Maker. The results are always the same: the white point and yellow are increasing after the first step( the other primaries and other ink combinations are really improving ). Basically, the process is: - print the IT8 target ( with the device link profile ); - measure the target; - create the abstract profile( using a previous correction profile if not the first step ); - re-create the device link profile using the abstract profile: ISO Coated -> Abstract Profile -> Printer Profile. Could you please tell me if there are there any known problems with refining or if you have an explanation for my results? I do not expect extraordinary results from the process, I do not expect it to do magic things, but I think at least they shouldn't that get worse. Also, in tweak/refine.c, in function PCSp_PCSp(void *cntx, double *out, double *in), would it be correct to test(something like dE) the new correction and the compund correction against the corresponding target reference data just to see which is getting too far from reference? Then the correction with the smaller delta will be considered( think it as a way to ignore the previous abstract profile for certain patches, that are getting worse ). I am still not sure if this approach would be correct, so it would be very helpful if someone can correct me if I am wrong( preferably Graeme :) ). Best regards, Marcel.