Inconsistent Print a stepped image


Active member
We are having issues on a narrow web, P9 Markandy, Subsurface print on clear, 4 AR. Dupont DFUV, UV Inks. LED UV Curing lights.
Plates stepped using an ESKO Imaging Engine 18.1, imaged on a Esko CDI.

On the first step image we get a heavy magenta as you can see from the photos. (Thats the actual color difference, not my camera)
Other parties involved in the investigation have found the dot pattern in the stepped tiff files are not exactly identical and have determined this is what is causing the issue. See attached.

Has anyone seen a small dot pattern create such wild print results?
And more importantly, does anyone have a suggestion.
Screen Shot 2020-04-21 at 10.56.47 AM.png
IMG_20200421_103655.jpg IMG_20200421_103642.jpg Screen Shot 2020-04-21 at 10.56.47 AM.png


First thoughts on cursory inspection of the close up dots - the image is already dots before you rip them to the press.
This leads to inconsistent dot patterns between the stepped images.
If your starting image is already rasterized, not a contone, this will happen.

So You Want to Invest In Inkjet

I Want to Invest in Inkjet, But…
Over the past few years I’ve watched a group of transactional and direct mail printers strategically shift from monochrome toner machines to full-color toner and inkjet presses. Most banished old black-only toner boxes but kept their color toner devices around because they anticipated needing both color inkjet and toner presses to meet customer needs. They were right then and continue to be right today. Because toner and inkjet can be better together. Read the Post