Question Roland XR640 - Banding on specific grey

[graphicsottawa]

Hey all - We have a Roland XR640 and we're trying to print on Avery MPI1105SC. The print has a few shades of grey in it as well as black and white. The light grey is BK11, the dark grey is BK17. Black is BK22. We're setting the spot colours in Versaworks, head speed is 400. We're getting banding *only* on BK17. Calibration is +0.05. Black and BK11 print perfectly. Anyone have any ideas why this is happening?

Thanks!
Phae

 

[graphicsottawa]

Solved!

The problem was in the media profile. IDK where the profile we were using came from. I downloaded the correct profile from Avery for our printer and ink setup and the banding went away. Just as a note for reference, there are two profiles for MPI 1105, one 6 pass, one 10 pass (for an explanation of passes, read this: https://www.arlon.com/blog/print-profiles-faqs/).

Printer Profiles are available here:
https://graphics.averydennison.com/en/home/services/icc-profile.html