Since I just received my isis on Thursday and I cannot read targets with ColorPort, I have been using Measure Tool and selecting the option which reads the patches twice with UV on and off. I have save both reading sets of readings in LAB. I am going to use Monaco Profiler to build my profiles. My question is do I use the UV cut version or the no cut version? I didn't have this choice with i1 Match previously. I created two test profiles and compared them in Color Think and the Gamut plot is almost identical. Since I am a newbie with Monaco, some guidance would be helpful.
You're not likely going to see a difference in the gamut plots between UV-include and UV-exclude measurements/profiles. It has little effect on the gamut boundaries. Where you should notice a difference is in the media white point. I would suggest viewing it as a 2D a/b plot and, if you have the option, view the primary and secondary plot points and look at the center of that plot between the two different profiles. Depending on the amount of UV brighteners ("OBAs") in the paper, you'll likely see a shift along the b* axis.
As far as filtration to use, it "depends".....depends on the amount of OBAs in the paper to start with. I use an iSis myself and, frankly, I get the best results with the iSis when I take BOTH sets of measurements and average the results. In my opinion, the UV-cut filtration goes to far in "neutralizing" the effects of OBAs. You DO see the effects after all so it's not a good idea to eliminate the UV visual effect entirely. On the other hand, no filtration at all tends to overstate the effect of OBAs (paper appears to 'blue" to the spectro so the profile tries to compensate but the result is too "yellow" in the final print) so that's equally not so good. Taking both sets of filtration data and averaging them is made easy with PM5 Measure Tool since you can request both sets of data right from the get-go. When it's finished measuring, simply leave both sets of measurements open and immediately go to the Averaging tool and select the measurement data from the pop-up. I'll usually go so far as to save all three sets of measurements (no filter, UV-cut and no Filter+UV-cut average) and profile all three and print the result. Virtually the only thing you need to look at would be a neutral gray ramp and check it for visual neutrality. The effect of the filters on color, especially saturated colors, is so minimal as to mostly not be worth considering. It should be noted that, while you CAN get both sets of measurements using ColorPort, you need to measure the chart twice, changing the filter settings between each pass through the iSis. When importing the measurement data into MonacoPROFILER, you simply need to select the "average" function and import both sets of data. There's a LITTLE more to it than that but that's the short version.
I should note that if you're using a RIP product that offers linearization....or plan to get RIP software in the future....it's almost a universal recommendation to use UV-cut filtration for linearization. Profiling on the other hand, use whatever works best.
Regards,
Terry
