I have been getting a micro banding problem when printing digital negatives. The banding runs parallel to the print head. I have only noticed it in areas of smooth tonal values in the mid to highlights (of the finished print). I have not noticed it when making prints (moab entrada, Canson Rag, Hanh photo rag).
I am printing with a R2880 on pictorico Pro OHP using the P2 selenium inkset using method 3 for my digital negatives. I am using a mac printing from Print tool 1.1 settings Rear feed 2880dpi uni-directional at no color management and 16 bit. For digital negatives I invert and flip the grayscale gamma 2.2 file in photoshop and my curve flatten and save it as a 16bit tiff file sized to output at 300dpi.
A few things I have tried with no noticeable difference . . . bi directional setting changing from default to patten gap wide setting. I have done nozzle checks most often fine but do have issues that seem to move around from nozzle to nozzle. I do see on this one some issues with the black ink but it should not be used for negatives correct? From carefully looking at the nozzzle checks I notice one line in the yellow ink is not in the correct position. Could this be the problem? Any way to correct?
I think i have attached the nozzle check and sample of the lines.