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Flexi RIP color help

yamaha581

New Member
We were using ONYX off of a different computer to print with our HPL25500 and had all the profiles set with the colors correctly. We now have Flexi on our own computer and have been messing around with profiles. We found that the profile we used in onyx still works best with flexi but we are having some troubles with colors coming out as clear as they were. I have a couple pictures to show what I am saying. I have never really adjusted profiles too much so I was wondering if anyone knew what we could do to fix the quality of the prints but still use the same profile? I have messed around with colors but they all still come out dotted like in the pictures.

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derekw13029

New Member
I use the FlexiPrint RIP on an HP Latex 330. To be honest, I really don't care for the program at all, and I frequently have issues with it (like the way it auto-tiles nested jobs, and so if you are printing several wall-covering drops that need to be in order, they will be all out of whack and won't be consecutively flipped like you need them to be, but I digress....).

Have you tested this issue on different media types? I have seen nearly this exact issue on DreamScape Matte Vinyl. I tried cleaning printheads, checking the optimizer ink levels, running a substrate advance plot, making sure the printheads were aligned, basically everything you can on the printer.

Needless to say, the issue was merely with the coating of the media. For me, the issue did not occur on any other kind of media, and it has happened on multiple roles of DreamScape Matte Vinyl.

To me, that doesn't seem like the RIP would do anything differently to affect the coalescence of the ink. You can try using a heavier ink density on your profile, but I doubt that will really help. You could also try to increase the amount of time between each pass, and increase the number of passes. This may or may not make a difference.

I'm actually really interested in this because I have seen this exact same issue and to be honest I have no idea what it is, either, and I even sent a sample of this issue to HP for them to look at and figure out. But replacing the media solved it for me. :/
 
The images posted by the OP appear to show coalescence in the ink. In the L2 series machines (L25 and L26), the biggest cause of this artifact is the incomplete evacuation of the ink's base (water) in the print zone. This causes the ink drops to merge and cause this artifact.

Solutions to this would include:

1) Use more heat in the print zone- This is not always possible, as the print heater maxes at 131 deg f.
2) Utilize an Inter-Pass Delay - This is a firmware-based tool (located under the Image Quality Maintenance Menu on the printer). It was added to the L25500 several firmware updates ago, so if it's not there, you need to update the FW in the printer. Try around 300 ms to start.
3) Print at a higher pass count. This gives the respective heaters more time to do their job.

Aligning the printheads is also a good idea.
 

yamaha581

New Member
Thank you for the replies! We were using the ONYX rip of a friends computer at another shop but since we have moved we now had to get our own and just went with the flexi cloud so we could pay monthly instead of all at once. I understand that ONYX is probably a better rip in the first place. We did not have these problems when we were using onyx so I just figured it was something with this rip. I will go ahead and try all of those out now and see if it improves anything!
 

yamaha581

New Member
When I go to adjust the interpass delay it has a lock beside all of those options. Is there a way to unlock that? I have been looking on line but have not been able to find anything yet.
 
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