Hi Roger, It's been so long since I posted here. I hope this is the right place. ; )

From a scientific perspective, you might run a small test. You could transform an IT8 using the workflow you described, and then compare the resulting Labeez of the 2 converted images. That would tell how ho far off you were before you even printed.

It was unclear from your post whether the profiles you mentioned are "canned profiles" or custom profiles that you made. In the case of canned profiles, there is a whole host of things that could be different and unknown between the 2 profiles. If there are both custom, following the same exact process, I would expect the electronic result to be very close and for the printed result to present a greater-but-reasonable difference compared to the electronic files. It sounds like the differences you are see are pushing the boundary of "reasonable". Here I would fall back to what others are saying about the output colorspace and the differences in the inks (assuming that both printers are also moving the material at the same speed, laying ink down at the same rate, and that the ink is drying at the same rate). Different inks will produce different behaviors in the colorspace that the profiling engine needs to accommodate (which is why proofing software like GMG and CGS tools iterate). These different behaviors might be handled slightly different but the profiling engine and would likely introduce some of the effect you are seeing. If you are feeling adventurous, you might try to add some "training data" to your profiles. That process would look like: -Prepare a "special target" (an Lab file with measurable colors that are important to you). Grays are always good. -Make your regular-ol profiles -Transform your special chart into the colorspace of the printer (gives you a set of device values) -Bolt those device values together with the original IT chart values to make a new super-special profiling target -Print that target and build a new profile -Rinse and repeat for "printer #2" -Compare -Enjoy ; ) -Marc