Hi, i'm having a problem with my canon ipf8300. I noticed today on a almost black print that there are several bands vertical ( on the same direction of the paper) along all the print. It's almost an invisible problem that you can see only with the sun light. I checked the nozzle and both are ok. I've made the alignment but nothing changed. I tried too the unidirectional print but nothing changed. The paper is a Hahnemuhle Photo Rag Bright White, it's a matt paper. Maybe it's time to change again the printhead.