Hello all, I was hoping I could dump this one in your capable hands for discussion.
We've just received a "very" run down Seiko 64s as a trade in for a HP9000 and I've spent the last week on and off replacing all consumable parts (ALL Maintenance kits: pumps, caps, wiping components, belts, ALL print heads...etc..etc....)
My nozzle tests look great the machine is capping fine and wiping fine, Every thing "LOOKS" like it should!!!!!
But when I run a colour sample out of ONYX 7.2 I get a print with white spots on it. Kind of hard to describe this one, it looks like ink pooling away from these little white areas. These spots are in heavy and light areas of print. Before I realized there was a problem I was in the middle of creating a profile (Avery SAV), my densities were: C=1.4 M=1.4 Y=.9 K=1.6 Linearization looked great but as soon as I got to ink combinations the dreaded spots appeared. I've used these densities or close to on our HP 9000 without any problems!
I've tried: -increasing the heat -various canned media setting and profile combinations using ONYX -4 pass and 8 pass -Various medias -I've also run all third party ink out and replaced with Seiko ink.
It went away!!!!! I really hate it when that happens, cause I don't have a clue as to the cause.
I can GUESS that because it was an older printer and had not been used for a while that there were contaminents in the ink lines or maybe air.....?????
Flushing a boat load of ink through seemed to be the ticket. If it weren't for an intermitten nozzel out on the LM we would be off to the races.....DOH!
Hello, we are experiencing the very same thing now on Magenta I assume since any colours containg Magenta is showing these randomly circular white dots. They appeared on a regularly printing machine. Any extra experience about what could be causing this ?
Hi Had the same with my machine - seems to be crap media - put a more expensive roll of media in and the problem went away. I think it is contamination on the surface of the material
