Hey folks, I have a heck of a problem here, that we are at wits end to try to solve. In a recent lunar new year related project, we had a spot colour orange on a spot colour red, and we got random, sporadic yellow lines in the middle of the orange. (On a Bizhub C1070 running an IC415.) As usual, I first assumed there was a mechanical issue, and cleaned coronas, examined other print jobs, but then noticed the line _only_ shows up in the orange, not the adjacent red spots, isn't in a consistent location across the width of the print, and isn't necessarily the same distance from the start of the orange elements.
We were told it was a file creation issue, not print-side, and running the job on a different make of printer seemed to confirm this. (C5501-IC408)
I tried running it on different paper. Then, we remade the file. Then we remade the file through a different computer. Then it was saved off a different program, and saved through a different format. The only thing that reduced the frequency, but did not entirely eliminate it, was flattening all the spot colours to a .jpeg. At this point it only showed up on 2 sheets out of 71 run. (Acceptable losses for the job we needed to run.)
As part of troubleshooting, and in hopes of isolating the problem, I created a test file of random circles in random spot or process colours, over various spot or process background colours. It even showed up on a green spot, still made to include the equal parts magenta and yellow from before, and could be seen faintly through the cyan toner. It's random, only seemed to show up in a single element type across the entire print page, and changed positions on the page. Everything we thought was dialed in was upended by some other occurrance.
Then came today, and my writing here. We're running a new job. New spot colours, new file, and this time orange over a navy blue background. Different computer, everything...
...And it showed up again. Subtle, but distinctive, and in a few specific locations across the sheet. I'm attaching photos of the problem, in hopes someone else out there has seen this before, and knows any steps or workarounds to fix it.
I'm at wits end. I've exhausted all methods I can think of to change things and adapt them. I've contacted Konica (over a week ago) and had radio silence.
On the photos, the arrow indicates lead edge leaving the printer.
Please help me Copytechnet folks, you're my only hope!
We were told it was a file creation issue, not print-side, and running the job on a different make of printer seemed to confirm this. (C5501-IC408)
I tried running it on different paper. Then, we remade the file. Then we remade the file through a different computer. Then it was saved off a different program, and saved through a different format. The only thing that reduced the frequency, but did not entirely eliminate it, was flattening all the spot colours to a .jpeg. At this point it only showed up on 2 sheets out of 71 run. (Acceptable losses for the job we needed to run.)
As part of troubleshooting, and in hopes of isolating the problem, I created a test file of random circles in random spot or process colours, over various spot or process background colours. It even showed up on a green spot, still made to include the equal parts magenta and yellow from before, and could be seen faintly through the cyan toner. It's random, only seemed to show up in a single element type across the entire print page, and changed positions on the page. Everything we thought was dialed in was upended by some other occurrance.
Then came today, and my writing here. We're running a new job. New spot colours, new file, and this time orange over a navy blue background. Different computer, everything...
...And it showed up again. Subtle, but distinctive, and in a few specific locations across the sheet. I'm attaching photos of the problem, in hopes someone else out there has seen this before, and knows any steps or workarounds to fix it.
I'm at wits end. I've exhausted all methods I can think of to change things and adapt them. I've contacted Konica (over a week ago) and had radio silence.
On the photos, the arrow indicates lead edge leaving the printer.
Please help me Copytechnet folks, you're my only hope!
Comment