Hi all, I think Terry's explanation of iteration is decent. The iteration function will not give you a whopping difference in the profile, but it can be appreciable. For example, I made an “iteration” or “optimization” or “color edification” chart that is comprised of about 2500 patches… all gray balance. Technically, it ranges from L*=0 to L*=100, with all rotations of a* and b* in +/- 1 and 2 increments. If you think about the gray axis of a profile as the “straw in the center of your drink”, think of this as a “really fat straw” with a buttload of patches crammed into it. Now keep in mind that, if you just tried to evenly disperse that many patches into that small of a region, it would be impossible to get a regular sampling of data. However, because i1Profiler dynamically creates those patches based on the profile you’ve already made, it automatically distributes them evenly. The net-net of all this is that, when using this chart, I typically see about a .5dE reduction. Sometime a lot more. Sometime a lot less. It’s largely dependent on how “regular” your printer is. Fiber anyone? What I really like about it is that i usually pick up an L* in both weight and purity. The black gets blacker and the shadow grays get cleaner… more neutral. If you’ve ever taken a good close look as the gray curves of a MonacoPROFILER profile, the horse tends to run off the track a bit once you get past the 3/4 shadow. While i1Profier already does a better job of handling this...the extra iteration can really snap that behavior back in. Heyah! I did some ungodly iteration tests with some huge charts and was able to widdle the dE down quite a bit. However, it was fairly consuming (in time/paper/ink) considering that I was well within the standard tolerance of most print specifications with my initial profile. I really do like the gray chart if I do say so myself. It fits on 1 page big page of for an iSis XL. If anybody would like me to post it, please let me know. Thanks all, Marc marc@colormanagement.com