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VP540 Streaking vertically - not banding

Bigdawg

Just Me
I am trying to print a mid-to dark blue display on 9mm Lexjet SR material. The profile they recommend is the 3M Ij180 profile (which I am using). Have tried a couple other cast generic profiles, but am getting the same issue.

I have streaks (slightly darker/lighter - not overwhelming, but visible) going up and down the print. Not horizontally like you would see with banding or feed calibration, but like ink is not laying down evenly across the print, creating a streak.

Does anyone have any clues as to what is going on here? I am seeing it in other colors printed on this material - but it is slight enough I've been able to get away with it. But on this full coverage blue, it's just not working... HELP!!!
 
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