I am having issues with a file that was created in InDesign and exported as a PDF 1.4 (see attached pics). The background is a blue gradient that fades from dark to light blue. The gradient was generated in InDesign. No matter how I save the file I am getting the same hard line in the gradient (ie PDF, TIFF, Photoshop PDF). We are using a profile that we created in Onyx using an i1 for printing on aluminum. The issue goes away when we use a different profile. The trouble is that all of our proofing and client approvals are based on the profile that is giving us poor results. My question is, what aspect of the profile could be causing the gradient to print so poorly? Onyx support suggested switching our QuickSet to force 16bit processing but this did not seem to have any effect. I have tried 3 different ways of creating this same gradient color combination (standard gradient, a light blue gradient with a feather on top of the dark blue, and a light blue that feathers to a dark blue on top of the dark blue) all with the same results. The shift happens in the same color range on all three versions. I have read somewhere that I may need to re-linearize the profile? Can anyone explain this process and why/if it would work? Many thanks.